Hi John , I to have a 150mm f/8 Saxon with a fitted Chromocor as well as a nice 10 inch f/10 newt and on the moon and planets these two are basically identical . A lot depends on the given night .
Have you ever looked thru a good 6 inch frac ? they are the best up to a given size ( 8-12 inch Joe blogs reflector , not the multy $1000's hand made babies like you have , nice ) and thats not just the views , cool down , set up/down ease of use and lots of other factors come into it .
Brian.
Quote:
Originally Posted by ausastronomer
Hi David,
If your 6" refractor is outdoing you're 10" dob on the moon and planets, I think something isn't quite right with the 10" dob.
I think one of the following issues may be at play:-
1) miscollimation.
2) thermal cooling and stability issues.
3) an astigmatic secondary mirror which can be easily fixed.
4) a dud primary mirror, which isn't so easily fixed.
I have two 10" dobs, one is a 10"/F5 with a very good GSO mirror (the secondary was astigmatic when I got the scope) and the other is a 10"/F5.3 SDM with a Mark Suchting mirror. There isn't a 6" refractor on the planet which will outdoor either telescope as a lunar/planetary instrument.
Cheers,
John B
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