Thread: Gso rc10
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Old 09-12-2011, 02:53 PM
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JohnH is offline
Join Date: Feb 2005
Location: NSW
Posts: 1,179
Gso rc10

I am thinking of getting a CF 10" RC for imaging with my AO-8/CFW8/ST2000xm/Losmandy G11G but I have some concerns and would appreciate some advice before I take the plunge.

1. Is this setup a good combiation for DSO imaging? I am in semi dark skies - the outer suburbs of Sydney - can see the Mway on a no moon night quite well...

2. Is the stock 3" focuser sufficient or should I plan on upgrading it
immediately? Will I need to refocus on filter changes - even if my filters claim to be parfocal? If the CF tube stable thermally such that I will not need to refocus due to thermal effects? Typical dusk/dawn delta T is 10C in my location.

3. I am not mechanically adept and am concerned about a couple of issus with this design of scope - the inital setup/collimation (I can ask the supplier to do that). But ongoing how frequently will collimation need to be tweaked? Not to happy with the idea of having to shim focusers or tune mirror separation. Are these scopes set/forget of in need of regular care and attention?

4. Will I need a FF given my ccd is not too large and if yes which unit is

5. I beleive these units have plenty of backfocus - so my imaging train should be ok - true? Would the FF make any difference?

Is there a better option for the money? I have had a VC200L in the past and was not overly impressed with it, but need a bit more light gathering power than the ED127 I am using today.
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