Quote:
Originally Posted by pigeond
I then stumbled across the 85mm as listed on Bintel's so I tried but it was definitely not it and looked pretty bad.
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Bintel should remove this as it is very wrong. The Celestron 93633-A was designed to be used with or without the reducer for a DSLR (55mm back focus) setup. The Celestron 93633-A is about 50mm. There is a reason for this length especially when using the reducer with a DSLR.... 105mm
Once I used the 105mm rule with my 294MC everything worked perfectly.
Quote:
Originally Posted by pigeond
Another thing I noticed is when I was doing 105mm with filter drawer and the Baader Neodymium Moon & Skyglow Filter, I get much worse image, with or without adding the 0.3mm according to the +filter thickness / 3 rule. This is something that I still haven't figured out yet.
BTW these are all done with an ASI294MC Pro.
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You are correct to factor the thickness of the filter. I never have and I haven't seen much negative impact by using my M&S Glow or my ZWO duo.
Just to note. you will never get perfect round stars to the edges of a non-hd SCT. Even a EdgeHD will only give you "better" but not perfect round stars on the edges. and the Celestron .63 reducer is not that good quality either.