02-24-2011, 08:50 PM
[quote name='mst' timestamp='1298572933' post='6328']
Heavy Coma. Maybe. At least that is what we currently suspect it is.
Nothing unusual with fast lenses, but the degree here is quite a bit disturbing. And completely ruins the MTF results at the border and corner spots until around f/5.6
I contacted Sigma Germany about this issue yesterday, but haven't heard back, yet.
Apart from this issue, the 85/1.4 seems to be one heck of a lens.
-- Markus
[/quote]
Well, that lenstip review did mention quite heavy coma (worse than the Zeiss and Nikon wide open). So maybe what you see is normal <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/blink.gif' class='bbc_emoticon' alt=':blink:' />
Heavy Coma. Maybe. At least that is what we currently suspect it is.
Nothing unusual with fast lenses, but the degree here is quite a bit disturbing. And completely ruins the MTF results at the border and corner spots until around f/5.6
I contacted Sigma Germany about this issue yesterday, but haven't heard back, yet.
Apart from this issue, the 85/1.4 seems to be one heck of a lens.
-- Markus
[/quote]
Well, that lenstip review did mention quite heavy coma (worse than the Zeiss and Nikon wide open). So maybe what you see is normal <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/blink.gif' class='bbc_emoticon' alt=':blink:' />