Quote:
Originally Posted by mork
Has anyone tried this on a 16" lightbridge (f ratio 4.5) and can tell me how it worked for them?
I understand from reading other posts that the lowest magnification I can use is regulated by exit pupil 6mm to 7mm and this gives 27mm to 31.5mm.
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I've never understood that maximum limits in a reflector. The claim is that if you get the exit pupil too big, you'll start seeing the image of the secondary mirror as a partial shadow in the eyepiece view.
Yet I've happily used a 40mm 2" eyepiece in my 14.5" f/4.5 dob, giving an 8.8mm exit pupil - and I couldn't make out any shadow or significant light drop off in the centre of the image.
Regards,
Renato