SCT reducer/corrector test

[Ewan]

Hi guys, a complete noob here so please explain to me like I am a five-year-old.

I have a C8 SCT, Celestron f/6.3 which I'm attaching right to the rear cell (i.e. before the visual back). Then the visual back goes to the f/6.3. I have a Celestron T-adapter and a Canon EOS T-ring for my Canon 450D. 

Now, what do I need to buy to be able to adjust the spacing everyone here's talking about?

I also have the ASI120MM-S camera, do I need to buy anything else for it (to be able to adjust the spacing - is that even needed for a ccd)?

Thank you

I use the Celestron one, http://www.amazon.co.uk/Celestron-93633-A-T-Adapter-C9-1-Telescopes/dp/B00009X3V8, with my C8 + DSLR & you can use it also with a ccd camera as well. So you have DSLR > Adapter > Reducer > Scope.

If i use my Atik + Filter Wheel it also works well.

This was shot with the Atik > FW > Adapter > Reducer > Scope :-

Full Frame

[Ewan]

I am actually wondering if i could use my C8 F6.3 reducer on my 80EDT, probably end up with too much vignetting with the Atik 3124L+ im thinking but without testing i won't know.

[perfrej]

Hi Per, just wondered if you ever did any tests with Optec reducer ?

Dave

Dave!

I sold the 925 quite a while ago, and I did not do any real tests with the Optec. What I did find is that it had a ridiculously small image circle...  

/per

[scibuff]

Any idea how the 0.8x William Optics performs with the C8? Basically, I have a C8 and a WO Star 71mm f/4.9mm and I'm getting the 0.8x WO reducer/flattener for it and would like to know if there's any reason to get the 0.63x for the C8 or if I can use the WO 0.8x - it seems that (based on the very first post in this thread) the FR/FF for f/4-6 refractors work at least as good as the Celestron's 0.63x (which I'm sure has to do with those being 0.7-0.8 rather than 0.63x).

thank you

[cerebrum06]

Ransu, hello!

Can you show me, how you connect TRF2008 to your SC?

I have old 6" Celesctron SC and i buy TRF2008. And my result is not too good, like your...

[Davey-T]

21 minutes ago, cerebrum06 said:

Ransu, hello!

Can you show me, how you connect TRF2008 to your SC?

I have old 6" Celesctron SC and i buy TRF2008. And my result is not too good, like your...

Hi and welcome to SGL.

This is a very old ( 7 years ) thread so you would be better off starting your own new thread.

Dave