Collimation on a Star

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After some requests to show a collimation video applicable to SCT and Maksutov scopes (and newtonians too, if the secondary is already set) - I decided to record this session and talk people through what I'm doing and why, in a 'live' manner - hope it's helpful to someone out there struggling to collimate their scope!! :-)
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Опубликовано:

30 май 2024

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Комментарии : 79

@backyardspacedude4238

Honestly, it’s so good to finally have a descriptive video showing EXACTLY what needs to be done for this method. Written tutorials and figuring it out for yourself is not the one. Thank you!

@paulyoung4817

Thank you, been in the game with an 8"SCT for several years, however this is a great illustration on how to collimate. Thank you.

@tubedude54

So much easier to do if you can see your computer screen while at the telescope! If not then having a helper to tell you which screws to turn is almost a must. I'd be tripping over everything trying to do it your way by myself! lol

@cratervanawesome

Great video. Something to note for newbies: If your collimation screws/knobs are already snug don't tighten before loosing the others. You don't want any of the screws/knobs to over tightened. You'll get a feel for it after a while. Always do tiny turns. At the start no more than a 1/8th loosen to the other knobs, 1/8th tighten on the one you're adjusting. Less as you get close. The EdgeHDs especially, the only pressure on the mirror comes from the center, you're basically balancing it on that tiny center pointed bit of the holder. I would expect you could get some pinches optics due to this as well if you over tighten.

@vidholf

Thank you! I've read about this method, but seeing someone do it is so much clearer.

@philleng480

That Luke, was a quite awesome video. Spot on with getting all the info in of how you actually do it, no shortcuts, no frustrating how did he go from here to there? Good close ups on the screen. Great tips and tricks. Keep them coming - your processing videos are the best on the internet atm. Clear, all buttons pressed mentioned. All explained without getting too slow. Not as funny as Dylan though.....but Dylan is the one and only astro stand up comedian.

@user-lt9py2pu6u

I don't own an SCT but found this an interesting video none the less, I find most things related to astronomy interesting including how telescope set ups work and how to use them..

@petesastrophotography

Excellent video Luke. I'm going to be doing this very soon on my SCT as I am getting it ready for lunar/planetary imaging (it hasn't been used for the best part of 10 years). I'm no stranger to collimation but this is still a nice refresher.

@stay_at_home_astronaut

The "hand shadow trick" is very useful.

@Astro_Shed

Excellent and very informative video, nice to see it done live….thank you for this 👍🏻

@KingLoopie1

Very good instructions! I like the hand shadow trick. Since the camera might be at any angle its a nice trick to help you figure out where you are. Thanks! 👍👍

@mikeharden7904

Somehow my support got canceled. Didn't know until I saw my name was gone from the supporters list. So sorry. I have since rejoined. Your videos are awesome and very helpful, insightful. Keep up the good work.

@HeavenlyBackyardAstronomy

Good tutorial Luke. I did a rough collimation last night (EdgeHD 11") but did not know about those two inner rings to watch for. I will go out again tonight and finish the job.

@deep_space_dave

Nice collimation video of that C11 beast! Thanks Luke!

@TheTabugman

I've been enjoying your channel for a while now and this video pushed me over the edge to become a member. And I'm a refractor guy... 😅

@ABCMO-bl5pi

Luke, thank you very much for creating this video. It has special relevanceto me because I really got my Celestron C6 far out of collimation about two weeks ago. I was using the C6 on my AM5 controlled with an ASIAIR+ to photograph M51, and I noticed the stars in the images weren’t round. So I decided to devote an evening to adjusting the collimation. Unfortunately, I had tested positive for Covid a little more than two weeks before that, and in retrospect I realize that one of my symptoms was the “foggy brain” one (I.e., you don’t think well or clearly). Well, after 90 minutes I had taken an airy disk that more or less looked like yours as you began collimating and made it much worse, so bad that the edge of the inner disk (the hole in the doughnut) now touched the outer edge of the larger set of concentric rings. At this point I was about ready to abandon SCTs. But I regained my equilibrium over the next couple of days, and I’m going to try to save the C6. Your video will be a great help, and I hope to give it another try in about a week when we are supposed to get some clear skies. I’m in day 33 of Covid now and about 85-90 percent recovered, so hopefully I can succeed in this rescue attempt! If I do, I’ll let you know in these comments.

@notmyname327

It's great to see the whole process! Even though I don't have a SCT I found it enjoyable and informative

@carvrodrigo

hi, my friend, great explanation. Just my 2 cents here: When you tighten 1, release the other 2 by the same amount, or vice-versa. This is because this secondary adjustment uses a pivot plate, so you need to keep the plate turning instead of putting tension in a specific direction.