Product Review on the Skywatcher F4 Aplanatic Super Coma Corrector

You got a F4 Newtonian Telescope??? Wanting to tune it for superb Astro images then check out this cool product!!!
PLEASE NOTE:
This product only works with F4 to F4.5 Newtonian telescopes only.
No other Newtonian telescopes will work with this product.
To Order the Skywatcher Aplanatic Newtonian Super Coma Corrector:
www.rothervalleyoptics.co.uk/skywatcher-f4-aplanatic-super-coma-corrector.html
Also available from Telescope Service:
www.teleskop-express.de/shop/product_info.php/info/p5836_GPU-Designed-Aplanatic-Newtonian-Coma-Corrector-4-element.html
M48 x 0.75 SLR Adaptor For Coma Correctors
www.rothervalleyoptics.co.uk/skywatcher-m48-x-075-slr-adaptor-for-coma-correctors.html
M48 x 0.75 SLR Adaptor available from Modern Astronomy:
www.modernastronomy.com/shop/accessories/adapters/canon-eos-m48-wide-t-ring/
M48 -T2 Adaptors for use with Astro CCD or CMOS Cameras.
TS-Optics Adaptor from M48x0,75 to T2 - low profile
www.teleskop-express.de/shop/product_info.php/info/p3504_TS-Optics-Adaptor-from-M48x0-75-to-T2---low-profile.html
TS-Optics Adaptor from M48x0,75 to T2 - 6mm optical path length
www.teleskop-express.de/shop/product_info.php/info/p10401_TS-Optics-Adaptor-from-M48x0-75-to-T2---6mm-optical-path-length.html
TS-Optics Adaptor from M48x0,75 to T2 - high profile
www.teleskop-express.de/shop/product_info.php/info/p10395_TS-Optics-Adaptor-from-M48x0-75-to-T2---high-profile.html
M48 EXTENSION TUBES:
TS-Optics 30mm Extension with M48 - 2" Filter Thread and 2" Diameter
www.teleskop-express.de/shop/product_info.php/info/p368_TS-Optics-30mm-Extension-with-M48---2--Filter-Thread-and-2--Diameter.html
Variable M48x0,75 (2" Filter thread) extension 17 mm through 23 mm
www.teleskop-express.de/shop/product_info.php/info/p4512_TS-Optics-variable-M48--2--filter-thread--extension---17-23-mm.html
BAADER VARIABLE T2 EXTENSION TUBES FOR ASTRO CCD/CMOS CAMERAS:
Baader Varilock 29 T-2 Extension Tube
www.rothervalleyoptics.co.uk/baader-varilock-29-t-2-extension-tube.html
Baader Varilock 46 T-2 Extension Tube
www.rothervalleyoptics.co.uk/baader-varilock-46-t-2-extension-tube.html
Altair 2"-1.25" Self Centering Eyepiece Adapter
www.altairastro.com/altair-2-1.25-self-centering-eyepiece-adapter.html
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groups/astro...
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[@TareqAstroPhoton]

I have this coma corrector, can't wait to use it for what its designed for, and hope nice results too, thanks for this video and review.

[@LAshotts]

Great review yet again Martin. Keep up the good work.

[@andelkoloncar4791]

AMAZING job Martin, just as always!! KEEP IT UP!!!

[@MPAstro]

Thanks again!

[@henri-julienchartrand3387]

Thank you so much Martin. You probably just solved my coma issues that I have with my f4 6 inches Orion astrograph. The baader MPCC MKIII does the job only to a certain extent. This one unit designed specifically for f4 might meet my expectations. Respectfully, HJ, Montreal, QC Canada

[@MPAstro]

Thank Heri for the positive feedback, it was real pleasure to make this video. Has this Coma Corrector get's very little info, and yet this the best coma corrector I've used which my F4 Newtonian is totally changed to very different beast. The images are so stunning and they appear much sharper than ever before. I now seem to use my Newtonian more often for imaging thanks to this amazing product. Thank you for support, don't forget to hit a like, subscribe and share this video. I will be away from social media for a while, Has I'm currently in the process of moving away, so no Astronomy reviews for a while I'm afraid. But this move will defo be worth it, with new video content coming soon.

[@RaysAstrophotography]

Newtonian Quattro seems like a good choice. It needs a good solid mount. Thanks for the review Martin!

[@henri-julienchartrand3387]

Good day Martin, Thanks for answering. Good luck with you moving challenge. Looking forward to hear from you again soon. Henri-Julien

[@ALSutton]

Hi. I use a smilar quatro with the corrector plate. And by far the best scope I have ever used. NEQ6 is a necessity due to the weight. By by far the best scope I have ever used.

[@skylinevspec000]

Thanks for this amazingly detailed video

[@MPAstro]

Glad you liked it

[@BrokenPik]

very nice , kinda looks like the ES HR coma corrector for the Bresser 20839. :-)

[@jamesdougan8789]

g`day martin great video good to see you post again after a while... few too many adds creeping in... its a little frustrating when concentrating on your great advice .. the content of the video is golden /excellent thanks again for posting cheers james D

[@MPAstro]

Thanks James for watching and for supporting this channel. Yes I agree what you say that there is ads creeping in, But KZbin is making it difficult to smaller KZbin Channels, I make very little money through AdSense, but it does pay towards new video content, and most of it is saved to buy new Astro gear to then review it later on. But I don't make this a full time job neither and to be honest I love making videos like this to share it out to our viewers. So I try my best to minimise the ads but it does pay me which helps towards more video content so you can enjoy and get as much advice as possible but using my own spare time and hard work, I should get something out of it. Remember it's OK to help and push free advice but little help of donation goes along way, Personally I don't like to ask for donations from viewers through Patreon account, when donations should be a charity theme to help people in difficult situations.

[@jamesdougan8789]

martin i fully understand what you are saying and i support your view on the subject i know its a way to support the channel as its not free for you to do it and you put in a lot of work and effort and time to give us advice and save us cash buying a wrong bit of kit for our scopes and the hobby there is a lot of expensive gear in astronomy and you help us by reviewing this gear so we dont make the wrong decisions based on advertising hype and i really appreciate and respect your advice ... sorry for my first comment i was a little frustrated at the time as i was concentrating on what you were saying and i was being selfish wanting you not to be interrupted to get the most from your review and i apologise for that and hope i have not offended you in any way cheers james D

[@MPAstro]

I respect you nor matter or what, I am nothing without your support the viewers, sometimes there is too many KZbinrs milking in the money, I totally agree what you say and I respect your honesty in this as well, I listen that you have a constructive comment and your right to say this. I am one of the few that strongly believes in Astronomy not only as a passion or interest but I firmly believe that we need to encourage newcomers to Astronomy. It's our generation that we have a important role, or a purpose to change other peoples attitude, and make them realise that reality is Science and Science is fact not fiction. And these videos is part of the program to get people into Astronomy. I am just a normal guy who survived many wars being a veteran, I turned towards Astronomy to overcome my scars of PSTD. Here we together must do the job to make Astronomy for All. But we must encourage the new generation into the hobby, and not turn it into a rich man's club hobby, this is not Astronomy is all about!!! So far I don't blame the young people, and I totally agree with them that there is a few assholes in this hobby who ruin it for us all. It's our attitudes we need to change, we need to be role models, so we need to put on the big boys and girls pants on and show leadership and respect, and get new people in Astronomy.

[@jamesdougan8789]

martin a channel you may enjoy is kzbin.infovideos deep astronomy they have live telescope shows / hangouts that have guests that are the people that are writing the science papers in astronomy and astrophysics . they have a pro version of the telescope hangouts that cover the new and proposed ground and space based telescopes like luvoir... hope you can make it some time .. grab a beer sit back and enjoy.. its on in the early evening your time i think for dates try deepastronomy.space ..... i am only a fan of the channel (like yours) i am not associated with it at all .... its a suggestion to have a look as i do with beginner astronomers i meet / answer in astronomy forums i surguest your channel to get them the good info they need starting out in the hobby maybe tony can have you as a guest expert / panelist ?? he has a couple from the uk cheers james D

[@julianparks8485]

Excellent review Martin. Thanks for sharing your expertise! Where did you get those collimation screws for the secondary? Bob's Knobs?

[@MPAstro]

Thank you for watching, these were just standard Knurl bolts which I've ordered from WDS Components, they sell variety of mechanical parts which are handy for telescopes. Expensive on some items but they are well made stuff indeed.

[@xe1zlgg]

Very good review,, nice improvement on the aplanatic desing... Astigmatism is not corrected at all but this corrector is not designed for that.... Maybe the Ackermann reducer corrector may do a difference on astigmatism. Thanks for share... Luis.

[@petematos6201]

This is fantastic information my friend thank you very much. My daughter and I just bought her a Skywatcher quattro 10" astrograph newtonian Reflector. Kind of confused about what to get for lenses and camera adapters etc. This information is perfect for us right now. It is most appreciated. Thank you.. What kind of mount do you recommend for this 10 reflector preferrably something reasonably priced.

[@MPAstro]

Glad it was helpful! For the 10" Quattro, I highly recommend the NEQ-6 Mount www.rothervalleyoptics.co.uk/skywatcher-neq6-pro-goto-mount-tripod.html there is a newer version of the NEQ-6 design out now with new added features gets very promising reviews too! www.rothervalleyoptics.co.uk/skywatcher-eq6-r-pro-goto-imaging-mount-tripod.html

[@gershondaniel9957]

Hi how you calculate the air gap for each focal lengh of telescop do you have formula

[@chrisstrobel3439]

Hi Martin, I notice the compression ring on the end of your focuser tube has three set screws, do you remember where you got it from? Mine is just the stock one with two sets screws and I'd like to replace it with a ring like yours. Thanks!

[@chrisstrobel3439]

Thanks! Subscribed. Can you use 2" eyepieces with this coma corrector? Also where did you get your blue saddle plate? Also on the accessory ring on your focusing tube .. did that come stock with your OTA or is that an upgraded one? Thanks!

[@MPAstro]

I am not aware that the this coma corrector will work with 2" eyepieces, has it's initially designed more for photography use. There is no 2" eyepiece holder supplied with this item, which will be needed to adapt to the Aplanatic coma corrector. But what I will do is try it out with the existing 2" eyepiece holder you get with standard F5 coma corrector. Once the weather clears I test it out and give you answer. I couldn't see why not?? The blue dovetail is a 10" Farpoint Losmandy dovetail plate, fantastic product, high grade Aluminium and very sturdy. Fits perfectly with the Quattro 8", Purchased quite a while back from Telescope Service. But there is an official Farpoint website, please check them out here: farpointastro.com/shop/farpoint-10-inch-metric-universal-dovetail-plate/

[@chrisstrobel3439]

Martin Pyott Hi Martin .. fantastic! Found the saddle plate and its in stock .. so is it just a matter of swapping it over to the Quattro using its existing bolts, or do I need to get different bolts? I just ordered the 8" Quattro yeterday after watching a lot of your videos, plus I found some fantastic imaging done with the Quattro on Astrobin and Flickr. I've been away from the whole scene for almost 20 years, but use to do a lot of film imaging with hypered Fuji 400 and my 10" f/5 Newt on a big Schaefer/Buyers mount .. a rig which I still have .. but getting on in yesrs now its just too heavy to move around .. so the EQ6r I just bought, and the Quattro which is on the way are my new tools, and your videos have been a BIG help! Yeah let me know what find out with the coma corrector, I have it narrowed down to either the Baader MPCC or the Sky-Watcher and am still trying to decide. Right now I'll be imaging with my Sony A7rII untill I can afford a dedicated CCD or CMOS cooled rig. Thanks! ............... C

[@TylerMillhouse]

Just ordered mine!

[@MPAstro]

You'll be impressed with the results, though expensive but worth it in the end

[@MrGeert1972]

i have the 150p Quattro and that came with the coma corrector and works great. but i don't like the ring at the back off the focuser. so i bought the Baader 2" clicklock but now i cant get focus anymore. that Baader is twiche the thikness off the standerd lock ring will it help to take out the coma corrector? or wil it only work with a astro camera to get focus? from what i now and see both my DSLR as astro camera need 55mm of back focus

[@philgolden8619]

Jesus that is a beast!

[@jeffslade1892]

Right but for the wrong reason. The cause is not the primary mirror per se but the angled secondary mirror. If we trace the path of the light beam we can see that the path to the image is longer from one side than the other, resulting in the non-circular image.

[@ManosZafirakis.ShapeMixStudio]

Hi Martin !! Thanks for the video. I don't own a telescope yet but I watch videos for astrophotography and I was thinking of buying a quattro. I am a little bit confused. So you don't need an eyepiece ? When you use a coma corrector you don't have to use an eyepiece ?

[@jeffslade1892]

Astrophotography rarely if ever uses the traditional eyepiece. Eyeball observation gathers so much less light that imaging by camera is so much more effective.

[@estibolitas]

hello! I have a question. Is the focal point (the primary focus) the same with the coma corrector? I intend to change my focuser but it will be a little higher and I don't know if I can focus with the coma corrector. Thank you!

[@hughmongus1233]

So I gather that you think a Newtonian is the best and a Newtonian is what I should get? Because a Newtonian is the best and there is nothing better to get than a Newtonian? Newtonian it is then.

[@ROY-COLLEY]

So what comma correct should I have for a Skywatcher 250pds Martin ?

[@whydidyouresign]

Specifically which telescope is this? Is it the 250P Quattro? Also, which mount do you show supporting the telescope? Sorry if I missed these bits... I did watch the vid and read the comments, too. Thanks!!

[@MPAstro]

Thank you watchin my video!! This is the 200P Quattro and the mount I use is the trusty NEQ-6 from Skywatcher!!

[@Mara-xd7bg]

Part of the coma corrector sticks into the tube (1,5-2cm?). Does it matter? Does it cause any reflections/difractions in the light path?

[@MPAstro]

It does not matter at all, as long your using the corrector for the Quattro series, the main important factor is the air gap from the corrector to the sensor of the camera!! If it's over the ideal 1mm +/- with the 55mm it cannot function properly.

[@Mara-xd7bg]

@@MPAstro Great, thanks for response. :)

[@MPAstro]

@@Mara-xd7bg No problem!!!

[@antoniomajstor9388]

Hi Martin. I know this video is 2 years old but I have a problem and this video is about it. I have the same telescope and coma corrector as you. And my problem is that I can not fit that coma corrector in the focus tube. I can but only inside that black plastic tube with screws. As soon as I reach the long focusing tube I can't go further. Do you have any idea what should I do?

[@MPAstro]

That is really odd, I've not come across this problem before?? I have seen your message and I did ignore your message to begin with but now I was trying to solve a solution for you for sometime?? And it got me thinking??? I believe the solution to your problem that Skywatcher have fitted 2" Format eyepiece adaptor for a Original F5 Newtonian. Maybe this Adaptor will be your solution to your problem!! TS 2" adapter www.teleskop-express.de/shop/product_info.php/info/p4018_TS-Optics-2--Adapter-with-Compression-Ring-for-Skywatcher-Newtonians.html So sorry for not replying back soonest??

[@antoniomajstor9388]

@@MPAstro Hi. As first don't worry about late reply, I am happy you replied no matter when. As second I contacted the store I bought the scope from and they had to send me the whole new tube for the focuser, so yeah the problem was the whole focus tube. Still again thanks for trying to help me and clear skies.

[@MPAstro]

Thank you for your reply back. At least you got a brand new replacement and now it works, that was a very good Retailer who delivered outstanding service to you!! Skywatcher products have really slipped big time!! I have so many people complain about their mounts too!! Some parts were missing, damaged and even parts not greased and these were straight from the factory brand new!! Skywatcher really need to get grip on their quality control, their standards have slipped after the lock downs we had. Hopefully everything should pick up and recover after the crappy 2 years we had so far. Now Christmas is coming Manufacturers should be pushing out the great products once again!! Also keep in mind to remind newcomers to say away from TRASH TELESCOPES which will also be out this year for Christmas too!!! So everyone watch your back and warn others of this crap coming out to trick and con people from their hard earned cash!!!

[@nathanhassey4724]

What guidescope mount is that? I’m looking to mount my guidescope to my 8” Quattro

[@MPAstro]

This is the Altair Astro 60mm Guidescope, They are very good quality, very sturdy and Altair Astro does packages for this design at a good price. Here is the link of this product: www.altairastro.com/altair-60mm-guide-scope-kit-straight-thru-precision-locking-focuser-no-eyepiece-77-p.asp

[@KZgun4hire]

Looks like your coma corrector extends into the OTA which I'm pretty sure would cause diffraction spikes. Which is also the reason you cant collimate the setup. The comparison images of the super corrector look quite good though. Did you notice if the corrector was extending into the OTA while you taking the exposures?

[@MPAstro]

Any Newtonian telescope will suffer from diffraction spikes no matter if a coma corrector is fitted on the tube or not. These spikes are caused through the spider vanes of the Newtonian telescope and bright stars will give that effect. It's nothing you can do on the instrument, other than you can process the star images out using Photoshop. But to be honest I like diffraction spikes on stars and certain DSOs like M45 The Pleiades open star cluster look awesome indeed. However some people like yourself don't like diffraction spikes in their images which I totally get it, as everyone as many preferences in their images.

[@KZgun4hire]

@@MPAstro That's true because the secondary mirror fins cause diffraction. However the fins are usually symmetric and fine. A two inch fat protrusion into the OTA on just one side is not symmetrical. When the protrusions are not symmetrical the diffractions will usually be very ugly.

[@KZgun4hire]

@@MPAstro Look at this video where this exact problem is clearly identified and explained. kzbin.info/www/bejne/d5fMZnVmd5iXraM about 2:30 time frame.

[@MPAstro]

Good point in the video and is very well explained too!! Yes my focuser obstructs a little but it's 1", and the Quattro series despite being a cheaper brand, does have baffles inside the tube, Also the tube is oversized as well to allow 1" gap all the way round the primary mirror. So far I've had no real issues with the diffraction spikes that look slightly out of place as shown in the video, So why try to fix the problem when there is none to fix.

[@Berkan4show]

Hi, I know this video is quite old so don't know if it's still active. I have this corrector for my 6" F4 (600mm) and my dslr. So backfocus should be 51.66mm but how should I do this? I'd need a M48 ring that's around 8mm~?

[@MPAstro]

You can use a Slimmer 1mm T-ring and use spacers to get the distance you need, Usually this Super Coma Corrector can fit most DSLRs with a standard T-ring. M48 Spacers www.firstlightoptics.com/adapters/astro-essentials-m48-extension-tube-set-4mm-5mm-6mm-7mm-8mm-9mm.html Ultra short Canon T-ring www.firstlightoptics.com/adapters/ts-ultra-short-adapter-from-m48-to-canon-eos-ef-only-1-mm-length.html

[@Berkan4show]

@@MPAstro Thanks for the reply!

[@dante2387]

Can this telescope be used only for deep sky and planetary observation? Or is it just for astrophotography use?

[@MPAstro]

Yes, but you'll need a 35mm extension tube to bring the eyepieces into focus

[@mimcan70]

Hello..could you recommend best affordable coma corrector/reducer for d150f700 newtonian please?

[@MPAstro]

There are 2 choices the Baader one (bit expensive , optics superb but no eyepiece adaption) www.firstlightoptics.com/coma-correctors/baader-mark-iii-mpcc-coma-corrector-photographic.html or the Skywatcher (cheap, good optics, eyepiece adaption and act's like a 0.9x focal reducer speed up your optics down to F Ratio, whatever scope is???) www.firstlightoptics.com/coma-correctors/skywatcher-coma-corrector.html I know which one I would pick, however both coma correctors are good and will help your Newtonian reduce those horrible star comet trails. When think about a coma corrector make sure your telescope has 2" focuser (to accept 2" format eyepieces) Mehmet can you provide any details of the Focal Ratio please, as these Coma Correctors will only work with focal ratios between F4.5 & F6, this is crucial factor you must consider before buy these, as if you use any coma correctors which are within these limits, they will not work at all, You'll need to know the focal ratio, To find this out you can use these app called "Astronony tools" astronomy.tools/calculators/field_of_view/ Select the FOV calculator, type in your focal length and aperture, it should calculate the Focal Ratio out for you, you can even apply the focal reduction to find out what the Skywatcher 0.9x Coma corrector can do to lower the focal ratio??

[@mimcan70]

@@MPAstro great advice..many thanks master :) I have a f1400 old newtonian reflective with 9.3 f ratio . Its barrel length endtoend is 520mm .primary mirror spherical blue glass dia 150mm thickness 14mm . Magnifyer/single focuser also has a max extension 160mm with a 17mm thick 20mm diameter magnifying glass at bottom. Only recently I bought a new 150dia 750mm primary+secondary mirror set which I want to modify my old guy with.. I will need to extend barrel length to 750mm plus with some extra work on it.. My target us to use the modified d150f750 for astrophotography with an unmodified apsc cam like sony a6000..thats why I asked about coma corrector which is supposed to help me in that final quest hopefully. Good day to you..cheers mate

[@MPAstro]

You got a great project going there, with that F5 Newtonian is going to be fast imager with the Skywatcher coma corrector, expect to get as fast as F4.3. The Sony A6000 is a very sensitive camera and you can hype up a lot of ISO with very little noise compared to normal DSLR cameras. The mirrorless sensor will bring to focus to the telescope, However one important factor I need to addressed to you is? despite the T-ring, you'll need spacers to get within ideal 55mm air gap from the sensor and corrector. The mirrorless sensor is a lot closer compared to normal Canon & Nikon mirror cameras as the sensors back focus are deep inside the camera body (hence why these coma correctors are designed in a way that you can just simply attach the t-ring). These Sony's are a different beast of a camera and so spacer adapters like these are a must if you want the coma corrector to work. www.baader-planetarium.com/en/baader-varilock-29-lockable-t-2-extensiontube-20-29mm-with-spanner-tool-(t-2-part-25y).html

[@dankahraman354]

How does it compare to the Baader Coma Corrector MPCC?

[@MPAstro]

The Baader works very similar to the Skwatcher Coma corrector www.rothervalleyoptics.co.uk/skywatcher-2-coma-corrector.html just the Baader has better optics and coatings. However the Aplanatic Super Coma Corrector works differently as it is designed purposely for F4 Newtonian Reflectors, They eliminate coma but they also flatten the field of an image, making your images much sharper and more natural in the frame.

[@kamilabertran3206]

Is that a 150/750 Skywatcher?

[@viperboych]

10:48 its heavier than it looks

[@MPAstro]

Yep my bad there, 300Kg should be 300g, Sorry about that Craig, I should have placed a subtitle embedded in the video to correct that one?? Lol

[@asteroid457]

Will this Quattro Coma Corrector work with 1/5 aperture?

[@MPAstro]

I'm guessing you mean 15" Aperture??? As long if the Focal Ratio is F4, the coma corrector should work

[@AB-ft2lb]

@@MPAstro It works at F5 too apparently. Owner's of 130P-DS swear by this CC.

[@anthonysaab1186]

Would this CC work with the Celestron 8 inch f5?

[@MPAstro]

No, this coma corrector only works with F4 Reflectors, at a push F4.5 maximum.

[@anthonysaab1186]

@@MPAstro Oh I thought it's the same as this one www.teleskop-express.de/shop/product_info.php/info/p5836_GPU-Designed-Aplanatic-Newtonian-Coma-Corrector-4-element.html. According to TS, it works with f5 also.

[@MPAstro]

@@anthonysaab1186 Where I was reading on the translation there is no mention of this corrector working with the F5. I would give TS a phone and check with them first before you purchase the item. TS are very good and I have bought a lot things from them. This looks actually the same as the Skywatcher one without a doubt. Check before you buy to avoid disappointment.

[@anthonysaab1186]

@@MPAstro Ok Thank you! One more question, if the spacing required is less than 55m, how can you achieve that when the DSLR Backfocus is 44m and the M48 ring is 11mm? this means you'll need to reduce the spacing but how's that possilbe?

[@MPAstro]

@@anthonysaab1186 Very good question, and the one you might need ask TS, as it's the optical designer quoted these measurements. The only way I think is to skim down the M48 ring (thread side) to remove material and make it slightly thinner. I believe that the coma corrector should with a +/- 1mm degree of error, as long if your within those limits even if your 1mm out you should be OK.

[@AG-kd3sw]

Hello Martin, thanks for Video! It’s nice! I have big problem with my coma corrector form Baader (Baader MPCC Mark III - Multi Purpose Newton Coma Correktor - Link: www.baader-planetarium.com/de/2%22-mpcc-mark-iii-(multi-purpose-coma-corrector-f%C3%BCr-newtons).html ). Most of the time the coma corrector don’t work good. I have “Coma form the stars” in the corner of the picture. Sametimes the coma corrector works good. I have less “Coma form the stars”, but never no coma! I don’t know why it sometime better and sometime not so good. Do you know why? I do alltime the same like you in your video. I have the same Newton (Sky-Watcher 200/800 quattro) like you. I have also a Canon cam (eos 1200D). But much more important you me is: Please tell me your experience with you coma corrector from Sky-Watcher (the coma corrector in the video). I have buy this coma corrector. I can give this coma corrector back. If you tell me that you have bad experience with this coma corrector. But I hope you tell me that you have very good experience with it. What I mean is: That you have all time no coma in the corners of the pictures. Now I hope you answer me soon and sorry for my bad English. I’m from Germany. Best wishes Andreas

[@Wub892]

First time i saw your name, i thought it said Monty python. I had to double take.

[@boku7n1]

300kg? Too heavy bruz

[@MPAstro]

So man, meant to say 300g. You got me there bro!!