So I'm going to go for a mirror lens, now I've got few questions.
First, the TAMRON 500mm f8.0 seems to get the best reviews by people, but there are a few rave ones on the Samyang (and variants) 500mm f6.3. There have been a bunch of scathing reviews on the Samyang as well. Please, lets not make this a Mirror vs. Glass debate ... I need something light and I'm short on cash, so mirror it is.
Now, where I'm looking for help is on these two questions
1) Is the variance in reviews a QC issue, or (sorry to say it) photographer error? (i.e. people not being good with a MF lens, moving it, etc). I've seen some horrid shots with the Tamron and great ones with the Samyang, for instance.
2) Is a f6.3 better than a f8.0 for these mirrors (to get more light), and how much impact does it really have on the DOF at 20+ metres?
Thanks!
Last edited by whelmed; 02-07-2010 at 01:26 PM.