Celestron EdgeHD compared to the Classic C8

In this video I will try to illustrate the similarities as well as the differences between the classic C8 and the EdgeHD 800.
I decided to buy the EdgeHD 8" when I saw one offered on a local telescope second hand market. It was a good deal and in this video I hope to show that it certainly has its benefits.
There are better reducers for the classic C8 available as the original Celestron 0.63x reducer/flattener I show in this video. In native focal length though, the EdgeHD is flat as well, whereas the C8 shows field curvature. It is not that apparent though when shooting with a cropped sensor as I have in the ASI294MC Pro.
Thanks to @erfmufn Dylan O'Donnell for your help ;)
No ST4 cables or eyepieces were hurt in the making of this video...
Chapters:
0:00 The hook
0:54 Awesome intro
1:19 Introduction
2:21 I need help
3:40 The reducers
4:55 The classic C8
6:53 An offering to the guiding gods
7:33 The EdgeHD
9:46 A poor man's KZbin collaboration
10:24 Comparison images
11:45 Outro
12:10 Outtakes
#asiairpro #zwo #optolong #ioptron #cem40 #celestron
My links
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TWITTER: / mjschoenmaker
INSTAGRAM: / astrokoplamp
TELESCOPIUS: telescopius.com/profile/schoe...
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Music/Sound effects:
Space - Saturn Dust - / @saturndust
Away - Patrick Patrikios - KZbin audio library
To the Sun and Back - TrackTribe - KZbin audio library
Get Back Up - Silent Partner - KZbin audio library
"Subscribe Button" by MrNumber112 • Free Download: Subscri...
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Edited in #Shotcut www.shotcut.org/

[@KopLamp]

Thank you for watching my silly comparison video. In case you didn't know Dylan O'Donnell yet, I suggest to check him out too. Very funny guy who takes beautiful astrophotography. kzbin.info

[@SimonsAstro]

@@KopLamp Yes I know Dylan, already subscribed, I’ve subscribed to to you also😀 I preferred your version of Dylan’s ‘Everything is meaningless’ (clear skies to everyone)👍

[@JonnyBravo0311]

OK, I laughed out loud when you introduced "Dylan O'Donnell" and the "hemisphere of less impressive targets". Subbed just for that 😂

[@KopLamp]

Haha. Nice. Saw your name and immediately said out loud “Don’t touch the hair”. My wife looked at me as if I am a madman. Could be she is right

[@DavidTremblay]

Lololol subbed too. For the same reason

[@KopLamp]

Thank you!

[@ronstewtsaw]

Me too!

[@lukomatico]

Hey Martin!! - Man, this one was awesome :) I really enjoyed it from start to finish, so much work must have gone into this one but it was all worth it! Well done mate, so happy for you to be closing in on 500 subscribers too, that's amazing! 👍👍

[@KopLamp]

Thanks. It really was a lot of work. Also planning wise. Had to write everything beforehand because I shaved for playing Dylan. 😅

[@Naztronomy]

Found myself watching through your old videos. This one is very informative and hilarious!

[@KopLamp]

Thanks. This is my most popular video. Probably indicating I should try to get Dylan involved more. Perhaps a real cameo someday instead of these poor-man-collabs 😅

[@Naztronomy]

@@KopLamp I'm all for that! Clear skies!

[@keithw7542]

Thank you, I really enjoyed your video and imitating Dylan! This was the first time I came across one of your posts and look forward to more! Cheers

[@KopLamp]

Thank you. There will be more videos that’s for sure. It might not be speedy, but there will be more!

[@unluggylounge674]

great video i thoroughly enjoyed that. the informative aspect and also the sense of humor. good idea to bring dylan in as a guest like that :)

[@KopLamp]

Thanks. I hope that my content helps people. And if not, that it creates a smile. Or both. 😅

[@kencrane4741]

As a total electronics nerd, I appreciate your trip into another version of Nerdville. Fascinating video.

[@KopLamp]

Thanks for finding my corner of Nerdville. I have several very nerdy video's :P There is one where you get to see the circuit boards of a telescope mount. Spoiler alert, no soldering in that vid...

[@NGC008]

Very entertaining. Looking forward to your in depth collimating video. 👍👍

[@oldfilmguy9413]

New viewer, new subscriber. Enjoyed your laid-back style and humor. Cheers!

[@KopLamp]

Thanks for the sub and compliments!

[@brentj7564]

Both entertaining and got across exactly pro and cons of both solutions. Well Done!

[@KopLamp]

Thanks for your comment.

[@AstroLaVista]

Best colab ever! I've not come across your channel before now Martin, but how can I not subscribe with such deadpan humour and a great comparison 😆👍

[@KopLamp]

Haha. Thanks for this awesome comment!

[@KopLamp]

You seem to be the 1200th subscriber. WOW 🤩

[@astronomynotebook]

Just love your manner of presenting your videos 😊❤️

[@KopLamp]

Thanks... It feels very awkward while filming, so thanks for this comment!

[@JoesAstrophoto]

Awesome video Martin! Great comparison and loved the Dylan collaboration lol

[@KopLamp]

Thanks. This poor man’s collaboration did not land me an APOD though 😜😇

[@martynh5410]

Brilliant video Martin! I instantly subscribed! I have an Evolution 8 EdgeHD and the 0.7x focal reducer. All I need now are some really clear skies in my back yard so that I can get more Astrophotography practice!

[@KopLamp]

Thanks for the sub! It encourages me to go on with this time consuming part of the hobby ;) In case you'd like to see my imagery you can look here (telescopius.com/profile/schoenmaker) or follow me on instagram.com/astrokoplamp

[@martynh5410]

@@KopLamp thanks Martin. I’ll check those links out.

[@frankskeen1310]

A good video. and I have had the C 8 & C 11 both with a reducer/flattner. I enjoyed the both especially the II inch which gathered so much more light so as to be able to spot small galaxies that I could barely see at all in the 8inch. I enjoyed your video a lot.

[@KopLamp]

Thanks! The C8 EdgeHD is now 'big scope'. Curious if I would ever venture into C11 territory.

[@Avanteesh_Astro206]

Great Comparison!! Love the outtakes. I like Your Sense Of Humour, Fun Video, Enjoyed It, Clear Skies!!👍👍🔭

[@KopLamp]

Thanks!

[@Diocrew]

That!!! was a great video! Very well done, informative and very funny!

[@KopLamp]

Thanks! I hope you like the rest of my content too. Last January I uploaded a video which (amongst another scope) also contains images shot with the classic C8 and the EdgeHD. 😎

[@Diocrew]

@@KopLamp I am new to AP and recently purchased an Edge HD 8, so I had to check this video out. I'll check out the other videos too! 🔭

[@jimbundy8449]

That was Awesome! Nice comparison and I was laughing the whole time about Dylan 😂🤣👍🏼

[@KopLamp]

Ha, yeah he is hilarious indeed 🤪

[@CosmuzzAstro]

You are a funny guy, I lost count how many times I laughed, especially at the end. Has Dylan changed his accent? A great video Martin, you can tell a lot of work was involved creating it. Top Job! A realy good comparison and nice images at the end.

[@KopLamp]

Thank you for these nice words. Lots and lots of work indeed.

[@bloodstone2000]

I enjoyed this one immensely! I recently acquired a Vintage Super C8 that Was used once in the 80's, then stored in a closet . Would love to see some Colimation tips and tricks!

[@KopLamp]

Well I guess I’ll have to make that video then… 😅

[@thomasbardenwerper9365]

Well done!! VERY informative and funny as hell too. Lots of inside jokes only astro geeks like us well get - LOVE IT!! Dylan's going to have to step it up to top your sense of humor!

[@KopLamp]

Wow. Thanks for the compliment. Glad you liked it. It was a pain watching those jokes over and over again in post processing having thought of and written them weeks before 😜

[@SimonsAstro]

Nice one Martin! A lot of work went into a funny video 😀 Good results!

[@KopLamp]

Thanks! Already hatching a plan for my next video

[@TheJerryRN]

Martin… most entertaining and simultaneously informative video since I was last on Dylan’s channel! Fantastic job. I am new to astrophotography and use a very unforgiving CPC 1100… feels like looking thru a straw but the view is amazing. My next purchase is a small wide field scope.. maybe a red cat. Thank you for the video…I subscribed and I might have a new man crush lol. Cheers!

[@KopLamp]

Haha thanks!

[@Astrobloke]

Well done Martin, Nice comparison and some comedy. You have found your calling.

[@KopLamp]

Thanks... if it is my calling I don't know ;) It was just my way of story telling for this specific video. But... perhaps one day I'll do imitations of other famous Astro KZbinrs. ... Now where do I go to borrow a black dog? ;)

[@VolklgirlKat]

Well done! I'm trying to decide on 8" EdgeHd --looks like its the way to go.

[@KopLamp]

Or the 9.25" if you can spare the money. (Sorry to add more options to that already-hard-to-choose-from list ;)

[@knightclan4]

Man That was a really great video mate! I’m subscribing

[@KopLamp]

Thank you! It took a lot of work to make this so I am glad it is to your liking.

[@knightclan4]

@@KopLamp On par with Astrobiscuit and Dylon Odonell

[@KopLamp]

@@knightclan4 Wow... that is very big compliment as both are my 'examples'

[@physmc1]

Nice informative video! As a note, fastar is available on all new celestron sct (edge and non-edge) and Starizona offers a conversion kit for the older sct. I agree that hyperstar is awesome :). Looking forward your video on collimation with the tri-Bahtinov mask. Seems like an improvement over the conventional method via the Fresnel disk.

[@KopLamp]

I wouldn't know how to make the old SCT (according to chips in the original fork mount dating from 1997) able to use faststar... The secondary seems to be an integral part of the corrector plate. But yes, I did hear about the option, but I intentionally left it out of the video to not over-complicate things.

[@DSOImager]

Fun video! I've been running an Edge HD 8 for a little over a year now.. no regrets! :)

[@KopLamp]

So far also no regrets. The old C8 went back to the previous owner. He was getting ever so more regretful selling it some 4 years ago. He was seeing my results… I have to say that I did many improvements on the scope in those years…

[@DSOImager]

@@KopLamp Wow... 4 years and back to the original owner. Interesting story. I have a hard time selling my stuff. I'm still holding on to an st80 and cg4!

[@bluecelox]

Very entertaining. Good job.

[@AstroCrescent]

Very informative and entertaining as well Subscribed 👍🏼.

[@KopLamp]

Thanks. Nice KZbin name ☺️

[@AstroCrescent]

@@KopLamp Thanks dear.

[@caput_in_astris]

Hi, great and very entertaining video - you have a new subscriber 😃 Question: when shooting with the C8 vs Edge C8 and with or without reducers, did you adjust the gains on the ZWO294? Just asking, as the stars looked less “pointed” with the reducers (even less with the /6.3) and I was wondering is this could also be due to a slight over-exposure - as of course, you will concentrate more light with the reducer, especially with the 6.3.

[@KopLamp]

No, I always have the gain on 120. This is unity gain, where the noise characteristic of the camera is optimal (according to spec)

[@erykmozejko3329]

Glad I watched this now just before I stepped into a library as it made me da laugh out loud a few times. Comedy element aside this was a really excellent subject comparing the standard to Edge HD OTA’s Ahhh! This means another you tube subscription

[@KopLamp]

Thanks!

[@horaciodortona574]

Thanks for posting this informative video. I too wondered if the edge hd was that much better than a c8 with a ff/reducer. As it turns out the "edge" has an edge but the difference isn't earth shattering...at least to me. Thanks for sharing 👍

[@KopLamp]

Exactly!

[@horaciodortona574]

@@KopLamp I own a vintage Super C8 Plus with excellent optics which I have enjoyed all these years and still do. Couldn't help but wonder if I was missing out with the edge. Thanks for helping me clear that up. 😃👍

[@KopLamp]

I’ve got comments on another KZbin video where I was told not to buy an EdgeHD as a regular C8 with a more expensive reducer/flattener than the celestron one, would give me equally superb views. I think the Starizona one was meant.

[@bobbeanbags]

I loved this!!!! And it was perfect!

[@KopLamp]

Thanks!

[@keithkorthals6183]

Nice job and really liked this! Any thoughts on the edge "lossing" some intensity because of the optical correction in the tube; there are some extra pieces of glass to go through. Reflection at least some from additional lens even though they are coated lenses. Etc

[@KopLamp]

I haven’t looked into this in detail. Only at native focal length this can be evaluated and both scopes performed equally from my perspective. I think it is not noticeable to have less light intensity. Regarding reflections, I don’t think it is an issue as the lens is deep within the baffle tube.

[@offraed6156]

Yes, theoretically you can get a small amount of light loss due to non perfect transmission at lens surfaces. Is it noticable viewing or when imaging? Probably not. American SCTs are variable due to manufacturing tolerances. This much overlooked truth is responsible for many users ascribing errors in the images as due to design differences, when really a particular telescope has not been figured correctly. Lower order spherical aberration and slightly rough mirror surfaces are the usual culprits. I have tested hundreds of them.

[@astrospeedcuber]

I'm surprised Dylan didn't see this video yet, haha. Very helpful, thanks!

[@KopLamp]

I asked his permission before I started and I sent him the link before I published. So he has seen it.

[@AstroSoundscape]

Nice work Martin I thought you did a great Dylan. Must have taken ages to do some of those shots. 👍

[@KopLamp]

It did take ages indeed. Well preparing I mean. Shooting it took me about 5 hours. I think it was 5 days of planning and 5 days of editing. Ha! Perhaps it will make me famous and then one day Dylan can try to do a good ‘Martin’ 🤪

[@edhowe6443]

Loved it! Thank you.

[@KopLamp]

Thanks!

[@textandtelescope8199]

My next consideration. Danke!

[@frackcenturion]

and we are all going to Bintel 🙃🔭👍 cool video Martin

[@KopLamp]

Haha... the NEAF commercials Dylan did! Yeah, I had it pop in to my mind a few time as well...

[@robertarmstrong9406]

Feel bad for Jupiter rules. He seems so agree. Missing the whole point of most of us taking astro-photos. It is about the fun. Only a few of us are professionals. The rest do it for the joy. To open up a fits file and turn it into a color photo. Wow that is what astrophotography is for most of us. If you have the money to put a telescope in space, fine but for the rest we do what we can afford. And we do it with joy.

[@uriahheep8470]

Thanks. Nice comparison.

[@Big.Ron1]

It is good to know I made the right decision. If it ever gets here. Thank you!

[@zaphus]

Awesome Dylan impersonation :-)

[@KopLamp]

Yes... Now I am curious in Dylan's Martin impression :P

[@endurance11]

Hi great video just wanted to know where did you get that custom focus knob on edge hd its really cool @8:09

[@KopLamp]

That came apparently with a MoonLite focuser I got with the EdgeHD. I am probably going to sell that as it is collecting dust (figuratively speaking)

[@nnikitaka]

This video is gold!

[@KopLamp]

Thank you. Glad you liked it.

[@stephenstrassen1135]

love the video well done and funny

[@KopLamp]

Thank you! I hope you'll also like my newest video on how to use the EdgeHD to create a Hubble Palette image of the Wizard Nebula

[@HEADLINEZOO]

A star is born.

[@Avecfort]

That's a great video. Lots of work must've gone into it. We'll done! Are you located in the Netherlands?

[@KopLamp]

Yep I am the Netherlands. The observatory where I filmed this is close to the German border. And yes, this particular video took in total perhaps 40+ hours to make. It payed off though as it is my most viewed video from the day it was uploaded.

[@Avecfort]

@@KopLamp nice! My fiance is from didam so maybe I'll try to visit the observatory one day when we go visit :)

[@Masoch1st]

this was really well made boys.

[@KopLamp]

I should’ve made a behind the scenes video 😅 Thanks for the compliment

[@Jcastleinfo]

Fantastic! Now for my Edge to be delivered….

[@KopLamp]

Fingers crossed it will be a quick delivery. And comes with clear skies 😅

[@iandobbin8068]

Great video 👍. Just found your channel. Subbed immediately. An Aussie, so appreciated the hairy legs. Somehow Dylan seems taller too.👍

[@KopLamp]

I did shave to look more like Dylan… did I have to do the legs as well??? 😮😅

[@gianlucabelgrado3624]

POV: You are looking if Dylan commented on this video

[@thompsonproductions4820]

Yes I am 🤣

[@KopLamp]

He told me he liked it. Does that suffice? I also asked for his permission to impersonate him

[@clintkennedy8374]

The meaningless joke got a subscribe from me lol love Dillon’s slogan that cracked me up and excellent video!! I’ve been looking at upgrading from my C8 to an Edge 8

[@KopLamp]

Thanks for your comment. I couldn’t leave the slogan out of course 😇

[@StargazerFS128]

Someone really likes the Star Stuff intro, I cant blame!

[@KopLamp]

If you impersonate someone, you do it as complete as possible 😅 Knew the accent wouldn’t work, so intro it was…

[@MrGuilletv]

hey martin, great video...how much back focus u use in the c8+0.63x reducer?

[@KopLamp]

The f/6.3 reducer by Celestron should have 105mm back focus. See 6:04 minutes in my video about Backfocus. kzbin.info/www/bejne/jYmTpmmroKp3hJI

[@thomasfox8027]

Brand new subscriber here. Great video!

[@KopLamp]

Welcome! And thanks!

[@NOWitsOKto]

Well done

[@KopLamp]

Thanks

[@geldingmakr]

@2:52 love it!

[@chulpitostados]

Hi, greetings from Ecuador. Suscribed!. I have one question, the C8, about what year is it? is the one around 80s and 90s?.

[@KopLamp]

The C8 in this clip originally was mounted on a fork mount. A Celestar 8. I had it disassembled once for repairs and on the main board was a sticker with 1997 printed on it. I guess the scope is from that same year.

[@AstrocandyTV]

Good sense of humour, Martin 😂

[@KopLamp]

Thanks!

[@lavers_1]

nice vid! does the specks/dirt on the C8 corrector inhibit performance? can it be cleaned?

[@KopLamp]

It has no discernable effect. You can clean it, but I never bothered. It is not in focus, so you don't see it. It probably accounts for a tiny loss in contrast. Look up the "mcdonald telescope incident" on Google and be amazed how much damage a telescope can endure without (big) issues.

[@rontencati1027]

Photos taken through each scope would have been nice. I thought that you were going to do that, they way you introduced the comparison in the beginning.

[@KopLamp]

I show the differences between the two with the shots I took of M13 (towards end of video). I also included a shot by Adam Drake who allowed me to show a Hyperstar field of view as well. See the chapter “Comparison Images”

[@ancientelectrons]

Cute guys modeling cool telescopes, awesome video!

[@KopLamp]

We agree! ;)

[@robgatehouse1651]

I know I'm not exaggerating when I say that this belongs up there with such cinematic achievements as Kubrick's 2001 or Pee Wee's Big Adventure. Dylan O'Donnell has never been more existential. Plaudits and kudos notwithstanding, it's great to see you acknowledge how the EdgeHD SCTs are a triple threat when you can add the hardware and a bucket of cash or credit. I got one and I'm glad I did. Like any good, well made machine they are multi-taskers and I have always enjoyed reading FB and forum scribblings contesting same. Thanks Martin for a very funny informative video.

[@KopLamp]

Haha “2021, an SCT odyssey”. Thanks!

[@BrentMantooth]

Looking forward to the tri bahtanov (however that is spelled) mask video

[@KopLamp]

I already have some footage, but it was shot in winter ;-) A bit weird to use that together with footage shot in the coming month :P

[@truckernige]

it’s Bahtinov after Pavel Bahtinov… just sayin…

[@banday78]

Great video, what the back focus distance on C8 reducer to camera sensor?

[@KopLamp]

105mm for the standard C8 0.63x reducer/flattener. See my video -> kzbin.info/www/bejne/jYmTpmmroKp3hJI For the EdgeHD 8" telescopes 0.7x reducer it is advertised by Celestron to be also 105mm's. See -> www.celestron.com/products/reducer-lens-7x-edgehd-800

[@frankskeen1310]

Maybe one day someone will make a complete telescope set that's provides the buyer and user with all they will need, or at least close to that. Such as a finder scope with matching scope for guiding beside it, quality upper and lower dovetail bars, focus mask as part of the scope, quality eyepieces at least 3 & a good Barlow, adapters of various sizes so you can attach different cameras and more. Sort of what Meade did years ago with their RX400 model were their folks set around and hashed out what would really make a great scope.

[@KopLamp]

ZWO is getting into something close to that I guess. They now have announced a mount even!. I guess, they are only lacking a telescope now ;-)

[@frankskeen1310]

@@KopLamp You are correct, Zwo's mission it seems is to arrive to a point where they can offer any and all things necessary for astronomy and astrophotography. Waiting to see what they come up with next, I already saw the new mount but like so many others I hope they dont push for all they can get in place of offering quality at an affordable price.

[@Miguel_Noppe]

Leuk vergelijk, ik had gedacht dat het verschil groter zou zijn tussen de gewone en de Edge eerlijk gezegd, zo zie je maar.

[@KopLamp]

Het grote voordeel van de EdgeHD is dat deze vlak is ook zonder reducer. Maar met reducer kan een gewone C8 het beeld van de EdgeHD prima evenaren, mits je een duurdere reducer koopt (bv Starizona) dan de standaard Celestron reducer. Misschien dat het prijsverschil tussen die twee indicatief is: 399,- vs 90 euro.

[@danjensen9425]

Awesome, thank you You have saved me money. I have a c8 and thought of selling it and buying a edge 8 or 9.25. Stars are the least interesting but galaxies and nebulas are. A comparison of those types of images would be nice.

[@anata5127]

It is not about stars. Edge produces sharper images. It is clear on bright stars. It will be very important, when you will be doing pictures of galaxies.

[@KopLamp]

I found the quality of sharpness indistinguishable between the classic C8 and the EdgeHD. The only noticeable difference is on the edges of images when doing things without a reducer. Only then does the Edge performs better.

[@anata5127]

@@KopLamp Exactly. I get no gain by going from 1400 to 2000. We can use half of sensor and get the same scale. By the way, have you tried Starizona reducer. They turn C8 into top notch scope.

[@KopLamp]

​@@anata5127 I do not own the classic C8 anymore. I only used it with (or without) the Celestron 0.63x reducer/flattener, which worked perfectly. The video shows the results at the end.

[@anata5127]

@@KopLamp Great. I owned both Celestron and Starizona one. You may not see difference on asi294. But you will on a large sensor. Moreover, it will be very noticeable on OAG. It was straggler with Celestron reducer. It just did not cover big circle.

[@sandaruwanmilan9535]

Thanks your support ..... can i use this 8 edge HD OTA for celestron 8SE computerlize tripod?

[@KopLamp]

I don’t know for sure. I only have experience with the mounts you see in my videos.

[@MPAstro]

Thank you Martin for this Excellent and so funny video!! Interesting comparison indeed!! Totally agree on your input!! To be honest I never liked his channel content as I've found him to be so arrogant and very rude to the Astro community. Yes everyone has a say on their videos but I don't agree on his feedback to be honest!! I've liked the video and subscribed on your channel, Awesome research my friend, I never laughed so hard in my life!! But you highlighted the key question that there are too many Top KZbinrs who totally authoritarian and elite that they become so toxic in their ways, thinking with their ego they honestly believe themselves to be Astro Experts when really they know nothing but steal other peoples ideas and make the videos as if these ideas are their own work. Your hard work is not gone unnoticed Keep it up!! WE WANT REAL Astronomers who speak the truth and not out there to make themselves a pillar of selfishness for fame, money, views and subs!!! BS Artists I call them!!

[@KopLamp]

Thanks Martin. I am just making video's on subjects that I think would interest others or on subjects where I myself struggled. As for instance, should I buy an EdgeHD when I already have a C8. One of my next video's will probably be about me messing up mounting an EAF (autofocus) on the EdgeHD. Got me frustrated at first, but then I found my mistake and fixed it. A typical example of a video subject I think more people will benefit from.

[@FabioS2k]

hi, can i find out which telescope and guide camera you use?

[@KopLamp]

Guidescope is a 60/280 ZWO. The guide camera the ASI120MM mini

[@jasonrichuitti8587]

Funny shit,loved the video!

[@KopLamp]

Thanks!

[@ACarterSr2004]

Does this telescope track movement of a planet or say the moon as they travel across the heaven? Plus, can you tell me if there is an adaptor for attaching a smartphone over the eye piece?

[@KopLamp]

The telescope mount you see in this video is the iOptron CEM40. It allows the telescope to stay aimed at celestial bodies indeed. There are many adapters available that allow a smartphone to photograph / film through an eyepiece. I have a Easypic Universal Smartphone Adapter which works well. Celestron also has one called the NexYZ adapter. Seems a good one too.

[@Johan22333]

hey . thats in lattrop haha i was there last weekend i was already intrested in buying an telescope and making beutiful pictures but last weekend got me hooked but lookint at all the different telescopes and equipment you can buy got me shook and the prices geez !

[@KopLamp]

Hey, hoop dat je het leuk vond in Lattrop. Prijzen zijn van 100 euro tot duizenden euro’s inderdaad. Bepaal eerst wat je echt wil. Een goede tip is het Nederlandstalige Astroforum.nl Er is op dat forum een vragenlijst te vinden dat je kan helpen tot het vinden van je weg.

[@Johan22333]

@@KopLamp oh bedankt voor de tip !!

[@cesarecannavo1134]

Good morning to you. Interesting video. I am interested in buying myself a C9.25" EDGE HD using a 2" Focuser from the company Star-Light-Instrument for SC, to do observations, but also occasionally with the two Nikon D800 and Z8 I have, do some photography as well. Some friends recommend the C9.25" XLT for making observations. But I have an AP-Traveler 105mm, used to having maximum sharpness, some friends, recommend me, also for making observations, the C9.25" EDGE HD. What do you think, which of the two instruments do you recommend? For making observations, do I need to buy the 2"-BackFocus system from Star-Light-Instrument or use without it? I would be very happy to receive your answer. I have a complete set of accessories for practising Astro CCD, however, I find it very difficult and complex. That is why I will sell the Traveler, and then buy a SC C925" Edge HD or XLT. What do you think? Thank you for your professional help. Bye. A

[@KopLamp]

Thanks for watching and commenting on my video! Since posting this video I have heard many people advising the 9.25" over the 8" Celestron. I have also heard people state that in case of wanting to shoot astrophotography with a reduced focal length, the flattener/reducers from Starizona on a non-Edge SCT are just as good (if not better) than an EdgeHD. The XLT is a bit lighter than the EdgeHD and it is also a huge amount cheaper. At the shop where I buy all my gear, the 9.25 XLT costs 2195 euros whereas the 9.25 EdgeHD costs 3375 euros. To me the only situation where the EdgeHD would outperform the XLT is in its native focal length. I am not a visual observer myself, so I have very little insight on which focuser to use. The stock focuser does have a potential difficulty in regard to mirror-flop as moving the focus is actually moving the mirror back and forth. Having a separate focuser on the visual back can resolve that, but that will have issues of its own. It can also be bought as an upgrade later when mirror-flop becomes annoying to you (or don't buy it if you get used to it, like I did).

[@cesarecannavo1134]

@@KopLamp I thank you for your very precise comment. I know the problem with the SC when focusing. In the 95', before I bought my Astro Physics Traveler 105, I had many negative experiences with the MEADE LX200, at that time they were not the MEADEs of today like ACF, which they also recommended to me. However many people say that the EDGE HD, are superior to the Meade ACF. Personally, I have a friend on Facebook, who uses a MEADE 12" ACF, which does a lot of planetary, but also solar shooting, using a 2"-Back Focus system to focus. As far as he explained to me, he set the primary mirror at about half position, then focuses with the back focus system. He has never reported any problems. At the moment, I'm still using the Traveler, but as soon as I can after selling the new, stationary AP1100 mount, I'll buy the C9.25". Have you ever tried astro photography from the primary of your C11" E.HD? How come you decided to buy the C11" E.HD and not the C9.25"? I think perhaps, since I will be doing more observing, I'd better buy the C11" E.HD instead of the C9.25". Only though, the field flattener, it's more inside type as for the C8" E.HD, and I don't know if that's a good decision. OK. I greet you cordially from northern Switzerland.

[@KopLamp]

Let me start by saying I don't own a C11 but a 9.25" EdgeHD at the moment. In the video it was still the EdgeHD 8, but I had an oportunity to upgrade for a very good price (not the one I posted earlier). You can find a video about the upgrade on my channel too. At the observatory where I do volunteer work they had a Meade LX200 ACF 16". It was a beast, but I never liked the images it produced. Recently they've sold it and purchased a EdgeHD 14" but as it is awaiting delivery the observatory has a EdgeHD 11" on loan from the shop. Fantastic scope! When shooting planetary you don't actually need the flat field of an EdgeHD as you are mostly only working with a very small object which you'll try to keep away from the edges of the field of view anyway. Collimating a scope that size can be tricky though and because of the weight of the mirror, even slewing from one object to the other can throw collimation off. When doing planetary, you'll probably want the best of the best collimation. I've heard people say that for this reason they tend to slew to a planet. Collimate the scope. Lock the mirror. And then fine adjust the focus with an extra focuser on the visual back of the scope. I have no experience with this as I hardly do any planetary and am not that precise with collimation anyway (still have to collimate the 9.25 after having it several months).

[@inquisitivesoul8978]

Good job Martin. Uh, but I know Dylan...😊

[@KopLamp]

According to the amount of subs he has, a lot of people know Dylan. 😅

[@offraed6156]

One thing you need to add is, that for imaging or viewing small objects like planets, double stars and very small DSO, any object on-axis that sits within the diffraction limited field, there is no benefit to the Edge HD over the standard SCT in terms of image quality. Also these telescope are variable quality wise, so it becomes difficult to judge optical quality of design, unless you know the figure on the optics and the wavefront error. No two SCTs are exactly the same.

[@KopLamp]

I am more a nebula enthousiast in my astrophotography. For planetary work the classic C8 is very good too indeed. See this clip I made with a compact camera, an eyepiece and the classic C8 you saw in the comparison video: kzbin.infoAN6Oy-hg6zw

[@anata5127]

Exactly! I have old NexStar 8i SE. Absolute killer! Made in USA. Bit any Edge up to 9-1/4 and on par with many 11” once. Edge problem is collimation. First, it is very tough to achieve. Second, de-focusing stars depending on direction. Third, doesn’t keep collimation well.

[@dunmer26]

Good video, funny guy 😂

[@KopLamp]

Haha... Thanks

[@sage.chapel]

I would like to know the name of the guidescope for the Black C8.

[@KopLamp]

It is the ZWO 60/280. www.ganymedes.nl/product/zwo-guidescope-60-mm-280-mm-met-beugels/ If you buy at this link, tell them I sent you 😅

[@jomon723]

🖖🏽👽✨ Nice show

[@KopLamp]

Thank you for watching. It was fun to make.

[@elmikol2443]

Great video!! It seems like Dylan has aged since the last time I saw him.🤔

[@KopLamp]

Yeah. And he sounded so Dutch as well. 😅

[@mycarolinaskies]

And got a bit taller too!

[@henrybroussard8363]

This video was way more than meaningless. lol... I bought a NexStar 8SE 5 weeks ago. Been cloudy here in Texas every day since my purchase... I didn't know the differences until I watched this video. Thanks for the info! I already knew about Dylan, enjoyed the spoof!

[@KopLamp]

Such it is with astronomy gear. I had equipment issues -> clear for nights on end. Resolved the issues -> clouds continue

[@batchosaurus]

good info, thanks.......not so sure about the comedy factor though .......cheers

[@KopLamp]

The comedy was fun to do. Had the entire thing scripted too as I needed to record myself twice with the same camera. To date it still is my most viewed video, so I am happy. A comparison video of an EdgeHD8 versus an EdgeHD925 will probably be done this year.

[@DavesAstrophotography]

And I thought the engaging question was going to be "Why am I wearing a head torch in broad daylight? ". 🙃

[@KopLamp]

Haha. Koplamp = head torch in dutch.

[@cdh79]

Just into the video: you call yourself "Koplamp"? Dan weet ik meer of min waar je vandaan komt ;) After watching it completely: That was great! I am contemplating of getting an EdgeHD, but don't yet know if I can justify it in the pristine Dutch weather that's just meant for astronomy. (I do own a Tak FSQ85 already).

[@KopLamp]

Busted! Yep, klopt... was mijn accent niet al voldoende? ;)

[@Kyle_Hubbard]

Dylan looks a lot better here.

[@hael8680]

Two observations: 1- some C8 can be turned into Hyperstars, 2- you used the worst possible reducer/ flattener i.e. the Celestron model. Starizona (the Hyperstar developpers) sell an SCT corrector that gives fantastic results much better than the Celestron reducer/flattener.

[@KopLamp]

I know. But I showed what I had. I am not a KZbin hotshot (yet) 😅

[@hael8680]

@@KopLamp You'll get there wearing that white lab coat and sandals...!👍

[@offraed6156]

This one of those "what do you mean by field flattener"? questions. SCTs have off-axis coma, so simply introducing coma correction at f/6.3 will improve the off-axis image but it doesn't flatten the field. Celestron have always been coy about this. When asked they have a "marketing" answer, not a technical one. Telescopes can display field curvature and distortion, correcting either one improves the off-axis image, but only a field free of field curvature, coma, astigmatism and distortion can be called a flat field in a meaningful way to an astronomer. You can have an instrument which has correction for field curvature, but it can still have coma. Manufacturers will claim their design is flat field, astronomers will still see coma in star images toward the edge of the field.

[@hobbylyfe4716]

Can you compare more targets?

[@KopLamp]

I only have M27 as well to present. See this Dutch forum post for the images: www.astroforum.nl/threads/8-edgehd-versus-gewone-c8.1470058/

[@denodan]

Loved your Dylan O'Donnell, was a laugh, but no Aussie accent. Anyway I think it is a waste of money going from an ordinary 8" to the HD series, unless your shooting photos at native f10 or Hyperstar. Otherwise there is not advantage. You can get a stararizona reducer, which will give the same performance if your using a reducer as the HD series Visually unless you have the best eyepieces you won't get the benefit of the HD series out of cheaper eyepieces which have their own aberrations. Oh and the newer C8, I think can be converted to the hyperstar, the 9.25 SCT can anyway. Buying the 8" HD, I feel if you are not using it for hyperstar or reducer you wasted your money, when, in fact could have got the 9.25 standard cheaper and with stararizona reducer flattened will perform just as well as the HD series, and if you got the 9.25 standard and the stararizona reducer would still work out cheaper then the 8" HD. I almost got the 8" HD, buy when I found out the 9.25 was $200 cheaper was a no brainer, bigger aperture for less money, made more sense. If I wanted the same performance as the HD, just get the starizona as you should be using a reducer anyway. The reducer for the HD series is not only far more costly the either the standard one or stararizona reducer, its very heavy and boy is it expensive. Aldo those screws that hold the mirror, if you forget to loosen them before focusing you may damage your focusing mechanism, etc? Also the 9.25 inch is known to have the best mirror as its f2.2, nor f2 as the other ones. It is a legend among the SCT telescopes and have the reputation of having the better mirror. As far as I can see, the only advantage the HD series has is going hyperstar. For planetary photography does not even matter as you centre the planet anyway. Personally I think you wasted your money, as the 9.25 standard is cheaper and a better figured mirror. Your only advantage is hyperstar. Also your images did not see that hugh an issue, with either. Afterall for years until recently everyone was happy with the standard SCT, hyperstar star is were it really matters. And yes if I was planning on getting an HD, it's wasted unless going to hyperstar. But then again would maybe better just getting the RASA. I think the HD series is over rated, when you can get a decent field flattener comb reducer that works ad well as the HD series. There is always ways around these issues

[@KopLamp]

I think everything you say are good points. If I had to buy new, I probably also would go for a 9.25, but an EdgeHD 800 came onto my path for a good deal, including the reducer and more goodies. ;-) Oh and Dylan... yeah, I couldn't resist when I found my old lab coat. You'll find 'him' popping up in more of my videos. My newest one (to be released today) also has a Dylan hidden in it - don't blink however 😉

[@denodan]

@@KopLamp cool good to hear Dylan O'Donnell, just hope your practicing the Aussie aren't lol. Bet Dylan loves it

[@Microtonal_Cats]

You didn't make the music under "Dylan" loud enough.

[@KopLamp]

Haha. Some stomping beats would’ve been appropriate 😇 Hoping to get a true collab with him one day!

[@svendemeyer6278]

dutch, clearly dutch :p wij kunnen dat dus nie verbergen als we engels praten :p bedankt voor de video :D

[@KopLamp]

Are you sure you aren't referring to Dylan's Australian accent? ;-) Hahaha. KLM Engels is erger geloof ik ;-)

[@svendemeyer6278]

@@KopLamp dat engels klinkt idd nog een pak erger. Maar bij u hoor ik het gewoon. Ben zelf belg en werk veel met buitenlandse firma's. Dus ik klink ook zo 😂👌

[@voyager037]

What a difference it makes...... :( 30 years and no significant improvements (besides the price level has improved for Celestron) . BTW never seen such a dirty correction plate. The classic C8 could use a pressure wash ! Without any hesitation I would buy some classsic C8. Very competitive at original focal length !

[@KopLamp]

It is specifically at the native focal length that the Classic C8 is falling behind on the EdgeHD. When using the telescope with a reducer/flattener, I think the classic C8 is just as good. Especially when used with a quality reducer/flattener. That corrector plate was dirty indeed. Still, it is not something you'll notice when imaging. These specks are so much out of focus that they are virtually invisible.

[@truckernige]

lol, very funny 😎subbed

[@KopLamp]

Thanks!

[@capturethephotons2078]

Lab coat and all!!!

[@KopLamp]

Had a lab coat. Needed a sidekick in this video, so impersonating Dylan seemed the most logical choice ;)

[@bobmanp8653]

i have a adhd 8 inch

[@KopLamp]

That is probably a lot faster telescope than my EdgeHD 😂

[@otrondal]

That straight and sober man is not Dylan.

[@KopLamp]

Yeah I still have to refine my impersonation. You could sponsor my - no yet existing - alcoholism, by having all of your friends subscribe to my channel 😅 Eventually I will get there and start throwing beer cans at my - also not yet existing - backyard observatory… 😇🍺

[@skye7690]

That old c8 glass looks a little dirty. ;)

[@KopLamp]

True. But you don't really see those dust specs as they are out of focus. But I should've probably cleaned it before showing it on camera during day-light ;-)

[@skye7690]

@@KopLamp Loved your video, such a refreshing style.

[@dos-trotamundos]

Nederland?

[@KopLamp]

Yes