[IanP]

Originally Posted by Rod771

Are you thinking of converting your CPC 9.25 OTA?

If your after the field of view I'd probably stick with your ED80. If your after the speed of F2 then it might be worth it.

When I was purchasing my scope I was told the 9.25 would be the smallest OTA to go for when using a DSLR on the hyperstar but they recommended the 11 for less obstruction.

I was recently chatting with a member who uses the 60Da with the Hyperstar on a normal C11, They weren't too happy with their results and replaced it with a Officina Stellare APO However, that's not to say your OTA wouldn't perform well. After seeing your M20 image at F1O , looks like you've got some good glass in that OTA.

Yes, Rod, I was thinking about this option, but after considerations I decided not to follow this path.
I know F/2-something is very tempting, however for this range I think triplets are better alternative.
The game of taking reasonable images with the CPC925 had changed since I fitted it with the FeatherTouch focuser, also PixInsight is very good software, so both things combined can produce not bad results.