01-31-2011, 07:54 AM
[quote name='Klaus' timestamp='1296454462' post='5791']
400mm f/6.3 mirror
[/quote]
What the heck were they thinking? I mean, take the usual drop in transmission of a mirror lens into account, we're looking at a 400/8 refractive lens here. Who is missing such a lens?
400mm f/6.3 mirror
[/quote]
What the heck were they thinking? I mean, take the usual drop in transmission of a mirror lens into account, we're looking at a 400/8 refractive lens here. Who is missing such a lens?