07-29-2010, 10:53 PM
[quote name='joachim' timestamp='1280428699' post='1398']
How much does it change from fully open to a stop down? Overall it seems you got a decent copy. I would still check for de-centering though by doing the famous "brick-wall". If it is severely de-centered this would show it.
I look forward to seeing your praxis report on this one.
[/quote]
About 2/3 stop. I think I'll pass the brick wall test before going away, I'll lose faith in it if I ever spot the tiniest thing!
I thought I was cured from pixel peeping with my pen camera but I realise it's only because I've been lucky : not much to complain about with my 9-18, 20 & 14-45 (that one is IMO very impressive). The 45-200 is probably still decent but doesn't shine so much when compared to its smaller siblings.
How much does it change from fully open to a stop down? Overall it seems you got a decent copy. I would still check for de-centering though by doing the famous "brick-wall". If it is severely de-centered this would show it.
I look forward to seeing your praxis report on this one.
[/quote]
About 2/3 stop. I think I'll pass the brick wall test before going away, I'll lose faith in it if I ever spot the tiniest thing!
I thought I was cured from pixel peeping with my pen camera but I realise it's only because I've been lucky : not much to complain about with my 9-18, 20 & 14-45 (that one is IMO very impressive). The 45-200 is probably still decent but doesn't shine so much when compared to its smaller siblings.