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Beginning Planetary imaging, Help!

Beginner Planet Reflector
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#1 Boven

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Posted 13 August 2022 - 01:31 PM

Greetings,

I have some experience with deep sky imaging, but I had only a few tries at the moon.

 

As for optics I own a 6'' f/5 newt which I haven't used for imaging, because it's on a dob mount and it has no prime focus; 300mm FL old lens

which won't be of much use except on the moon maybe.

I also have 2 DSLRs, ASI 120mini, and eyepieces of very decent quality (x2 barlow, 26mm, 9mm).

 

I could start with a DSLR-Barlow-Newt for planets, but without the mount I think it'll be hard to guide by hand.

Using only my ASI 120mini and the Newt will give me very small FOV, so even worse. What do you suggest?



#2 ngc7319_20

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Posted 13 August 2022 - 04:01 PM

I would say to get a tracking mount and put the 6" F/5 on there (for starters)  Mount does not need go-to or anything fancy.  A drive and some slow motions are all you need.  Maybe find a used CG-5 or similar.  A good finder scope will help, too.

 

Use the ASI 120 with a Barlow and the 6" F/5 for now.  While the field of view is small, you don't need much field for planets.  The finder scope can help you get the planet in the FOV.

 

The DSLR will be difficult.  Ideally you want to take 30 to 100 frames per second (to freeze the seeing) and then register / stack them on a computer.  It will be difficult to get those frame rates with a DSLR.  Video on a DSLR is usually highly compressed, which will introduce noise, and that is bad.

 

Maybe later get a used 8" SCT.


Edited by ngc7319_20, 13 August 2022 - 04:02 PM.


#3 Tulloch

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Posted 13 August 2022 - 05:53 PM

If you haven't seen it already, the FAQ at the top of the page also has a bunch of tips on planetary imaging that you might find useful.

https://www.cloudyni...ated-july-2022/

 

Andrew




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