Astro Tutorial #1.5: Focal Length and Aperture

[@catchingphotons]

I just uploaded a remastered version of my first videos with enhanced audio quality and no coffee :-) Check them out: kzbin.info/www/bejne/m4K7mpqMiZplhtk ! Clear skies!

[@MattRussellUK]

Thanks - the slurps were...distracting.

[@parthpatel0335]

You deserve more views. Just dont stop making videos.

[@catchingphotons]

Don't worry, I won't :-) Thank you very much for your encouraging comment! Greetings and clear skies Chris

[@Sarimae23]

@@catchingphotons I can only copy that. you need more views. :) Well done, thank you

[@ericfrench2021]

@@catchingphotons Just found this channel. Very informative video. Thank you!

[@kevinwilliamenriquez2641]

Why is this channel not more popular? I've been stargazing and doing astrophotography for months, and a lot of these basic concepts haven't sunk in as well as they have, until I've watched this. keep it up and please make more! :D

[@catchingphotons]

Thanks Kevin for your encouraging comment! I will keep on doing stuff. We are just at the beginning :-) Even though the theory part is quite important, I think! Next will be Hardware and then Image Acquisition.... still a long way to go. Spread the word, if you think the content is worthwhile :-) Clear skies! -Chris

[@kevinwilliamenriquez2641]

@@catchingphotons sharing with friends. Surprisingly useful for intermediate astrophotographers too (fine tune and review).

[@TheCommandModule]

Clear and Crisp explanation of various variables in telescopes. Helped me to understand field of view (fov). Thank you.

[@catchingphotons]

Thanks a lot for the comment, glad the video helped! Clear Skies!

[@bennybooboobear3940]

Hey man, (as everyone says) you really deserve more views. I can see the amount of effort and time you put into your vids! I love your accent as well, keep doing vids and don’t give up!

[@catchingphotons]

Thanks Benny for the kind words! Creating this channel is a cool experience 😉 the community is superb and I get a lot of encouraging feedback. So: thanks for that!

[@hoaithanhnguyen7178]

actually this is very good for someone to start the hobby. thank you Chris.

[@catchingphotons]

Thank you very much for the encouraging words!!

[@thehonestcourier]

Thank You so Very Much. As you know telescopes are a Great Mystery to most. Just this one video taught me far more than I could have ever figured out for myself. Your presentation was great, your breaking down and explaining the focusing details was PERFECT. I am shopping for a "better telescope" for my grandchildren and now while I am certainly not an expert. at least I have a basic understanding. Thank You Again.... and Merry Christmas. Gary Rullo , Delaware

[@catchingphotons]

Ah thank you so much for your kind comments! This is truly what keeps me going! Cheers and clear skies!

[@cosmoscafe3745]

This is the best video on focal length ever! 💯

[@catchingphotons]

Oh thank you very much!! Much appreciated!

[@esparagus]

Thanks for the videos. Very informative and well done! I am just about to buy my first telescope and your videos have been the most to the point pieces of info I could find.

[@catchingphotons]

Thanks esparagus! I'm glad the videos are of any help! What first telescope are you tending towards? Greetings Chris

[@esparagus]

@@catchingphotons did not decide yet but looking for a refractor for ease of use. And a good mount too with solid tracking.

[@esparagus]

focusing on the mounts at the moment. probably an eq5. and a refractor in the 1k EUR range. recommendations are welcome.

[@catchingphotons]

The EQ5 or the EQ6 will serve you well. My EQ6 -R Pro is on its way!! I can't wait for it to arrive! I'm in team "Newton" but I'd recomend not to use focal lengths above 750-800mm for the beginning. Shorter FL are easyer to polar align, to star align, to frame, to guide/track. @astrobackyard uses a few short FL scopes. Check out his channel! kzbin.info/door/n3npsPixgoi_xLdCg9J-LQ Greetings Chris

[@zeynaamazonlu7978]

Pleaseeeee keep the videos comming ..i so desperately need you in my life right now to help unravel this mystery of which telescope to purchase.... Thank you ..

[@catchingphotons]

I will. Despite "normal life" I two videos are currently in the pipe. Barlow lenses and projection methods. That will be it for the "theory" part and we will move on to the hardware part. That might help you with your decision! I'm honored, that you count on this channel! Clear skies! -Chris

[@clestonlopes6618]

Nice job, very informative ans well explained, my wife said that you made it easier to understand.

[@catchingphotons]

Thank you very much! Greetings to both of you!

[@charimuvilla8693]

That was very useful! What's your opinion on barlow lenses? Can they really make up for a shorter focal length?

[@catchingphotons]

Thanks Chari, barlows can help alter your focal length for sure BUT only within the given borders of optical physics. The longer the focal length of your scope the lower the areal luminosity in the images you take. And: you must not exceed the physical boundaries of "magnification". Every telescope has a maximal resolution. That is given by the aperture of the scope. So maybe not the best idea to pimp a 400FL/50AP scope with a 5x barlow to 2m FL :-) Other way around: The shorter the focal length - yes - the wider the FOV BUT every imperfection will be visible in shorter focal length ranges. See with my 750mm F5 Newtonian scope. I need an extra "coma corrector" to undo the intrinsic errors of parabolic mirrors at the edges. Otherwise the image is out of focus at the edges. So there are "folded light path scopes" with extra adapters to turn a F11 into F2 (astrobackyard has a great video about his one). BUT they are primarily build as F2 with a WIDE aperture. All the mirror elements are of best quality to go for this range. Never touch a F12/50mmAP long lens scope (let alone 2 lens designs) and "shrink" them to F2. That just does'n work. But in the end: My F5 750mmFL scope is too short for planetary. So I use a 3x barlow and I am happy with this. The resulting 2.2m FL is as high as I want to go with my seeing conditions and there I am :-) Other way around: M32 the Andromeda Galaxy just doesn't fit into one frame. So I need a x0.75 focal reducer. That is fine and works for almost every scope. Hope I could help and sort some things out! Clear skies! Chris

[@charimuvilla8693]

@@catchingphotons Wow that has to be the most detailed answer I ever got on youtube thanks a ton! I ordered a cheap 7cm aperture 30cm focal length telescope to see if telescopes are my thing and I was wondering if I messed up with that focal length. But I'm guessing barlows will help me see some planets.

[@catchingphotons]

​@@charimuvilla8693 You are very welcome! Ok, 300mmFL is a rather short scope but 70x2 = 140 times magnification is possible. So... try 2x barlow and a 10mm eyepiece? Jupiters moons are spectacular to see, even with small binoculars. Greetings Chris

[@3uphrates]

Thank you for the clear explanations, great work!

[@catchingphotons]

You are very welcome! 🤗 Cheers 🍻

[@ninjaace0944]

hello i hope you can answer my question. i have a celestron powerseeker127eq. it has aperture of 127mm(5 inches) and a focal lengh of 1000mm is it good? it also comes with a 4mm eyepiece, a 20 mm and a 3x barlow lense. the 4mm is to powerfull i will see big but blurry. the telescope cost around 230$ thanks

[@catchingphotons]

Hey ninja! The power seeker is an entry-level Newtonian telescope. The mount looks kinda shaky to me but for plain visual it might do the job. It's an equatorial mount meaning you need to polar align before observation but on the other hand tracking objects will be much easier. Best case: just turn the RA knob. Can't say anything about the optics. With f7.5 it's not fast, not slow and the focal length of 1000 will allow you to observe the moon and the planets easily. Max magnification is ~2x aperture [mm] so around 250x. If you use the 4mm eyepiece (looks quite cheap to me) you are on this edge (1000mm:4mm=250x). So I doubt you will get much use out of the 3x Barlow. For brighter Deep Sky Targets the 124mm aperture might just be enough. You can expect to see the inner core of Andromeda or the bright core of the Orion nebula or very faint hints of brighter planetary nebula. Don't expect to see any structure within deep sky objects. Your scope has too little aperture to resolve those. My Newtonian telescope has nearly the same specs: 750/150. And I'm quite happy with the scope. Using it for the planets can reveal the rings of Saturn or the structure on the surface of Jupiter or its moons big craters on our moon and even some details on Mars. My recommendation: maybe invest into a good 10mm eyepiece and a high quality 2 x Barlow lens and if it's within your budget try the smartphone adaptor from celestron. With this adapter you can capture videos of the planets or parts of the moon and stack those later on on within autostakkert!3 to achieve sharp results. See my latest video about smartphones within astrophotography for more info. Clear skies and lot of fun with your scope!! -Chris

[@ninjaace0944]

thanks clear skies to you to

[@timsexton]

Very well explained. Thank You !!

[@catchingphotons]

You are very welcome Tim. Thanks a lot for your comment!! Clear skies!

[@patrickmole9645]

Best explanation for Aperture

[@catchingphotons]

Thanks Patrick!

[@solkatlol]

Dude, excellent video. Very useful for someone like me who just bought their first telescope.

[@catchingphotons]

It's soo cool that this videos can be of any help! What scope did you buy? Clear skies to you and lots of fun with the scope! Chris

[@solkatlol]

@@catchingphotons Oh for sure. I'm gonna eat them all up a time or two in the next days. Very informative. I bought a Celestron Advance VX 8" Newtonian - it might be a gamble but I figured I'd start at a decent level. :P

[@catchingphotons]

@@solkatlol Is it 1000mm FL? That's actually pretty long. Make sure to nail polar alignment. The longer the focal length the higher the precision needs to be with everything. But 8" Newtonians are cool :-) What mount did you buy? Greetings Chris

[@solkatlol]

@@catchingphotons It's identical to this one. Has a built in automatic mount. :) kzbin.info/www/bejne/onaqo2iap9amr7M&ab_channel=AstroBlender I have my first trip coming up this weekend, so I'm very excited.

[@catchingphotons]

@@solkatlol Then: clear skies buddy!

[@marktom5243]

Very informative and concise. Thanks.

[@catchingphotons]

Thanks Mark! Appreciate your comment!

[@joeabad5908]

Starting to get interested.. My interest is more with birds than sky. Im eyeing an SVbony SV503 though taking my time per your advise as the total price easily piles up as I add accessories...

[@catchingphotons]

Yea... unfortunately this equipment tends to get quite pricey. Anyway: Clear skies!!

[@joeabad5908]

@@catchingphotons thanks

[@catchingphotons]

@@joeabad5908 You are very welcome!

[@jesseavalos08]

I need help i keep viewing Jupiter with a bright white object how can i over come the bright light and see more detail of Jupiter thank you for sharing

[@catchingphotons]

Hey Jesse! Are you talking visual or imaging? What is your equipment? For visual: check your focus and/or use a filter to dim the light. But normally I'd say that Jupiter should be visible without filters. Imaging: check gain and exposure on your camera. When set rightly you should see Jupiter's surface but hardly the moons. Clear skies!!

[@RonySemaan]

Very educative and informative details. Nice work & thank you

[@catchingphotons]

Thanks for the encouraging comment, you are very welcome. I hope my video-series is of any help. Clear skies!!

[@deep_space_dave]

Even though I understood the fundamentals, your video really solidified them! Well done!

[@catchingphotons]

Thanks David! Well appreciated!

[@ryry4298]

This is the video i was looking for before i buy my first scope

[@catchingphotons]

Cool! Glad I could help! Have you already purchased your scope? What is it? Greetings Chris

[@_mahii_1003]

Can you suggest best telescope under $400

[@catchingphotons]

Sure, for what purpose? Do you want to travel? Are you stationary? Do you want to image? Are you team visual? What targets interest you most (planets or giant nebula)? ....... My tip: download "Stellarium" and play around with different focal lengths. Clear skies!!

[@_mahii_1003]

@@catchingphotons I love deep space so I just want to see some planets and nebulas. Love to take photos too ☺️

[@catchingphotons]

That's a broad range! 😉 Deep space is something totally different than planetary and visual is different to photography. I'd make a suggestion: Planets are a cool thing to view. To do so you need a long focal length. To visit any deep sky object (planetary nebula and stuff) you need some sort of aperture. Why not buy a Dobson? That's the most aperture you can get for the money and cool for planetary, too. You can add an additional smartphone adapter for your eyepiece and capture breathtaking images of the planets and snapshots of some bright deep sky objects. Truth: you won't take APOD images of nebula with such a scope but it's brilliant to get into the hobby and to learn the night sky. I'd choose the Skywatcher Skyliner (150) or some equivalent, the Celestron NexYZ Smartphone Adapter or equivalent and a normal 2x Barlow lens (Omegon or something). For start use a 10mm and a 25mm eyepiece. That in combination with the Barlow should do the trick. Clear skies!!

[@anata5127]

Telescope should be presented with camera. Right? Only this combination is important. FOV, resolution, etc is function of imaging scale. Right?

[@catchingphotons]

Partly right. But in this video I wanted to focus on scopes themselves. Cheers!

[@anata5127]

@@catchingphotons Not particularly, fully right. Scopes are bought on base of imaging aims and cameras in hands. This topic critical. It could be broken on parts and presented meticulously.

[@ytaky]

Good explanation, thanks! im trying to decide what telescope to buy.. for the last 2weeks :/ so far ive narrowed it down to: - Bresser Sirius 70/900 refractor - Bresser Venus 76/700 reflector price wise Venus is 33€ cheaper, so that doesnt help (much) both have similar size and weight.. both come with 4 and 20mm, 3x barlow, red dot and smartphone adaptor im after quality moon gazzing, some saturn, jupiter eyeballing and some nebula if possible, what would the best choice be? Thanks.

[@ChrisSmith-lk2vq]

Mobile me: Hey and thanks for the comment!! Both scopes are cheap ones. Some would call them beginner scopes but I'd hesitate doing so because a beginner scope should serve the beginner well! I'm in doubt whether your suggestions would be best fitting. The refractor is achromatic - meaning no good correction for chromatic aberration. The reflector is color true but with both scopes the focal ratio is pretty large (9.xyz) and the mounts (!!!) are somewhat weak. My suggestion: spend a few dollars extra and get this: skywatcher skyliner 150p dobsonian The Dobsonian mounting is sturdy, the scope of good quality and with 150mm aperture you will be able to see some planetary details as well as some faintnebulosity of DSOs with your eyes. Very cheap scopes are often not the best joy... The best scope is the scope you enjoy to use. See my episode about mounts for the importance of those ;-) Greetings and clear skies!! Chris

[@ytaky]

@@ChrisSmith-lk2vq Thank you for answering. in all honesty I am a "noob" all my sky exploring till now was made with my eyes and a pair of cheap binoculars. So a cheap(ish) telescope would be the logical upgrade in my opinion.. I would like to stay under the 200€ mark. Would the Bresser 114/500 Solarix be a reasonable "upgrade" to the other two telescopes I mentioned? Considering my objective Thank you

[@catchingphotons]

Hey Tiago, what do you want to do with your scope? 500mm is more like bigger sections of the sky - star fields or very (!) bright DSOs. With the attached 2x Barlow you can observe sections of the moon - planets... maybe. Install "Stellarium", enter the specs and play around with the given field of view. So you will get a feeling of what you can expect. Keep an eye on the mount! Under some aspects it is much more important than the optics. Greetings Chris

[@davidbrandenburg8029]

I would recommend 114mm or larger mirror on a newtonian, considering how cheap they are inch for inch compared to refractor telescopes!.

[@catchingphotons]

Both groups have their advantages and disadvantages but true: I'm a big fan of reflectors, too.

[@ManishFrenchStudio]

Knowledgeable video 💖💖🎉🎉🎉 thank you for sharing 🙏😀🎁🎁🎁🎉🎉🎉

[@catchingphotons]

Thanks Manish, you are very welcome!

[@jons2447]

Thank you, Chris! BTW, multiply by 25.4 to convert inches to millimeters, 2.54 for centimeters. (For those that don't know.) Have a GREAT day, Neighbor!

[@catchingphotons]

Haha, thanks Jon! Where are you from? Clear skies!!

[@yenyelinito]

What a good video, keep it going!

[@catchingphotons]

Thanks for the words of encouragement! I will, the next video is in the pipe - just took a bit longer than expected. Greetings Chris

[@kevinstiles1752]

I Know this is a dumb question but, what is meant by OTA?

[@catchingphotons]

As always no dumb questions: In astronomy, OTA stands for Optical Tube Assembly. It refers to the main body of a telescope, which includes the optical components such as lenses or mirrors, but excludes the mount, tripod, and other accessories. The OTA collects and focuses light to form an image, making it the core component of a telescope system. Cheers!!

[@mrlittlefinger1516]

Vivid and exquisite description!

[@catchingphotons]

Thanks ahmad!

[@brownsamurai3070]

Coffee cup was neat. Immediately made me want to get up and get a 2nd cup.

[@catchingphotons]

The opinions about the coffee diverged ;-) Clear skies man!

[@keepondev]

wow! man thank you for the great explanation.

[@catchingphotons]

No worries mate. Glad you find it helpful. Clear skies!

[@bobbertonsmivelton7019]

Hi just wondering, I live in Australia, it's windy over in Queensland right now, and even if I put a heavy base under it, it wouldn't stop wobbling. Any ideas?

[@catchingphotons]

What is the name of your mount and the focal length of your scope Bobberton? Clear skies!

[@bobbertonsmivelton7019]

@@catchingphotons The name of my mount is Saxon EQ3 Mount and the focal length I've found is around 700mm. Cheers!

[@catchingphotons]

@@bobbertonsmivelton7019 EQ3 and 700 is always a trouble. I used a EQ3 until recently. It didn't wobble around in normal usage but was too unstable for longer exposures (>30" was tricky). But wind is always a problem for mounts at their weight capacity limit. Greetings! Chris

[@bobbertonsmivelton7019]

@@catchingphotons Thanks I'm thinking of buying a different one, any ideas?

[@consti-xe8cj]

i have a 1000mm newton telescope and its not really long more short idk why

[@catchingphotons]

Hey Consti! What do you mean "it is short". Like physically? 1000mm is considered to be intermediate long. It's not 2500mm but... short would be something like 400mm but: there is no real definition! Clear skies!

[@consti-xe8cj]

@@catchingphotons ok its hard to explain here is the link to the telescope: www.astroshop.de/teleskope/celestron-teleskop-n-127-1000-powerseeker-127-eq/p,7934 im just wondering why this telescope still short with a 1000mm focallenght thats what i mean btw thank you i wish you clear skies too!

[@Trying858]

It is a reflector so the light travels twice to 3 X as far in the optical tube. I have a really short 1300mm FL scope Maksutov-Cassegrain.

[@gouravranjan9558]

According to you which is better Astromaster 130EQ or Astromster 114EQ. Bcoz I m little bit confused among these 2 models. Please suggest me.

[@ChrisSmith-lk2vq]

Mobile me: "What do you want to do with the scope?" is always the first question. Both scopes will only be useful for first visual steps. Do not attempt to step into real astro photography with those scopes. The mounts are not motorized and quite weak. The 114 seems to have an additional lens in front of the eyepiece. This is called Barlow lens. I don't know why they would do so?! A shorter scope would be faster and deliver brighter areal targets... given the same eyepieces. Whatever. I wouldn't buy a scope with attached Barlow lenses. If you ask me: go with a 20cm Dobsonian. They are cheap and the mounting (Dobson mount) is sturdy. No alignment needed - point and shoot. If you then wish to enter astrophotography... Go for dslr lenses first (traveling mounts) or - with a big scope - nothing under eq5. The mount is everything!!! See my episode about mounts. Greetings Chris

[@catchingphotons]

Hope, that helped :-)

[@anirbanchowdhury5777]

This is really helpful, thanks

[@catchingphotons]

You are very very welcome!

[@kelrico1]

Great video. Thank you!

[@catchingphotons]

Thanks Kelrico1, you are very welcome!

[@ephjaymusic]

Love these videos!! Thank you!

[@catchingphotons]

Thanks for the encouraging comment!!

[@Fredrikaolsen]

Awsome vid! Learned alot

[@catchingphotons]

Thanks!! Clear skies :-)

[@The-nn6kr]

That coffee slurping is like nails on a chalkboard lol

[@catchingphotons]

There is a coffee sipping free version uploaded for your convenience.

[@balack106arrow]

You are doing a great job. Just stop drinking whatever it is because I couldn't finish the video.

[@catchingphotons]

Thanks for your comment! I just uploaded a remastered version of my first videos with enhanced audio quality and no coffee! Check it out: kzbin.info/www/bejne/m4K7mpqMiZplhtk

[@babaali7050]

thanks. you gave easy explanation. Keep it up.

[@catchingphotons]

Thanks, I will :-) Clear skies!

[@bobbailey7235]

What is the worse sound to hear: a. a grizzly bear running towards you as you look thru your telescope? B. A tornado approaching your home with no basement or storm shelter. C. The sound of your internet teacher slurping coffee during the class. If you chose C then you watched this video and heard the sounds which ripped the neuron synapse apart as you were trying to understand this video’s information.

[@catchingphotons]

Thanks Bob for this feedback. Every feedback is well appreciated and I do conciser redoing some of the first videos anyway. But that will take some time. The upcoming videos are mostly "coffee-free" and I hope you like them anyway! Clear skies to you!

[@catchingphotons]

I just uploaded a remastered version of my first videos with enhanced audio quality and no coffee :-) Check them out: kzbin.info/www/bejne/m4K7mpqMiZplhtk ! Clear skies!

[@martinvillamayor5354]

How much apeture has your coffee?

[@catchingphotons]

Differs with the time of day ;)

[@Amradar123]

Nice videos but why the slurping noises? It distracts.

[@catchingphotons]

Hey Marc, Please feel free to watch the "coffee-free" and audio-enhanced version of this video: link is in the playlist. Clear skies!

[@robertmadey6085]

great video if you like astronomy and listening to someone slurp coffee constantly.

[@catchingphotons]

Thanks Robert for your comment! Coffee is (mostly) banned in future videos... Clear skies to you!

[@humlakullen]

Thanks a bunch:-)!

[@catchingphotons]

You are welcome ;-)

[@astrowales5581]

great video!

[@catchingphotons]

Thanks!!

[@maheshprajapat3555]

thanks sir

[@catchingphotons]

You are very welcome!

[@garyliu6589]

💕

[@deltacx1059]

Keep in mind the focal point isn't exactly a point it's a plane and that fact will absolutely screw with you if you miss it whilst building a scope.

[@catchingphotons]

And most often it's not a plane but a curved plane if you try to build a mirror telescope. :-) optics are tricky.

[@deltacx1059]

@@catchingphotons seems to be curved with refractors too considering I need a field flattener for my homemade refractor.

[@davidbrandenburg8029]

better consider cashing in one of those kids, if you want a newtonian in 12 inches or larger!.

[@catchingphotons]

The most important point here is the mount! No good telescope without the mount.

[@Matt-pi9jo]

Lol @ 1:27 coffee ☕️

[@Matt-pi9jo]

And more hah

[@catchingphotons]

;-) I swear it's gone in more recent videos. Thanks for watching! Clear skies!

[@pubgplayer9064]

I am making a 1,000 mm telescope 😆

[@catchingphotons]

Fair plan! Clear skies!

[@pubgplayer9064]

@@catchingphotons i don't have money brother that why 😢

[@theprimer1024]

Stop drink this coffee!! It's not nice to hear!!!!

[@catchingphotons]

Got your message. Clear skies! -Chris

[@catchingphotons]

I just uploaded a remastered version of my first videos with enhanced audio quality and no coffee :-) Check them out: kzbin.info/www/bejne/m4K7mpqMiZplhtk ! Clear skies!

[@jeffczartoszewski4568]

Great video untill I the disgusting sounds of you slurping and gulping filled my ears. Why on Earth would you think anyone wants to hear such revolting noises. We scold children for slurping and making such noises. Too bad. It was a very informative video 🤢

[@catchingphotons]

Thanks for your reply and the very "explicit" description, Jeff! Some are offended and some are not - there won't be any in future videos but I can't promise that for any upcoming 7h long live-sessions :-) Maybe a great Talisker Storm against the cold...

[@redpilldude8688]

Thank you for this comment. I agree. No more slurping pls.

[@akm1967]

Sip sip. Really!???

[@catchingphotons]

Sip Sip - yes. Somehow I need to redo my first videos in the upcoming future. Stay tuned :-) Clear skies - Chris

[@catchingphotons]

I just uploaded a remastered version of my first videos with enhanced audio quality and no coffee :-) Check them out: kzbin.info/www/bejne/m4K7mpqMiZplhtk ! Clear skies!

[@ericdran9181]

Okay, the Coffee thing was Really annoying...

[@catchingphotons]

For non-coffee-folks I uploaded the entire series "coffee -free". Head over to my playlist for more videos 😊 Cheers and clear skies!

[@viewfromthehighchair9391]

People below are questioning why you don't get more views. I agree in the quality of the videos; however, I would suggest losing the coffee cup sip. I know you think it is charming; however, for some (like me), it is annoying as hell. Stop doing it and the views will come.

[@catchingphotons]

Got it! This video is a bit older and I switched to coffee free content a while ago 😉👍 There is also an edited non -coffee version. I left this version online though because some folks find it relaxing, so.... As always: one topic, multiple opinions. Thanks though for your kind words, very much appreciated! Cheers and clear skies! Chris

[@mechengineering583]

everything was well explained except the coffee sipping. Which was irritating. Sorry.

[@catchingphotons]

Thanks for the feedback! You will be delighted to hear that I re-uploaded the coffee-videos with enhanced audio and without coffee. All videos in the play list are "coffee-free" :) kzbin.info/www/bejne/m4K7mpqMiZplhtk Clear skies! -Chris

[@lalunaraggio31]

The tea sound is creepy and annoying ☹️

[@catchingphotons]

😅 the community is 50:50 about that sound. Especially for folks annoyed by that sound I re-uploaded the entire chapter without tea 🍵 feel free to watch the enhanced version. Clear skies!!

[@davoc5140]

Deine explanations sind fantastisch ...mein Deutsche ist nicht so gut...

[@catchingphotons]

Danke für das Lob!