Hi all,
I have been Googling around but can't seem to find and useful information on which Focal Reducer I should be using with a DSLR camera.
My main imaging scope will be my C8 with a FL of 2000mm. I am aware that I would be crazy to start off astrophotography using a 2000mm FL. So I need some help.
I have read that using a F3.3 reducer will create severe vignetting on an image. Is this true?
F6.3 reducer = 1260mm FL
F3.3 reducer = 660mm FL
Thanks in advance.
