Quote:
Originally Posted by Dilsh
Hey Martin,
I have the 36mm LRGB SHO 3nm Antlia Pros with a QHY filter wheel and a QHY290m. They are awesome filters.
They are all parfocal (i.e you can focus with the L filter and that will be in focus for all the other filters). Keep in mind my focal length is only 600mm (waiting for my observatory build prior to upgrading scope). I have no issues with focusing when switching between filters. I focus once and then never again for the night.
I would get the 36mm. With your larger sensor (I only have the 290mm pro) then you will only cry once  .
Hope that helps,
Dilshan |
Hi Dishan,
Thanks for your comments, very much appreciated
The fact that they are all parfocal is great news , it’s going to save so much time during a session as I don’t auto focus with the EAF. I’ve never had an out of focus session in 6 years , maybe once or twice from memory. I rarely find my focus drifting during the night.
I image with 3 Newts and my 2600MC , 6” @ 900mm fl , 8” @ 1000mm fl and 10” @ 1280mm fl
I’ve done the calcs on the 10” and require 33mm filters ( 36mm would be ok ) but I’m going for 2” for future proofing
Thanks again
Martin