03-13-2011, 01:14 AM
[quote name='IanCD' timestamp='1299955863' post='6699']
Great! Thanks, Markus <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />
Following up on the 'cutoff' issue... It seemed like a good plan to stick to lenses which get 4* or more for optical quality...
The Nikon 35mm 1.8G DX makes that, but the extreme borders have lower resolution, and I wondered if that would be the sort of performance which you'd seen struggle on the D7000?
(I just checked out the Sigma 30mm which clearly doesn't make it at all..!)
Ian
[/quote]
Corners for a prime wide open are not very important at all. The DOF will be so shallow that you almost never will look for "sharp corners".
Corner sharpness tends to be more important with landscape stuff, with bigger DOF and with wide angle. With shallow DOF, you almost never are dealing with a flat subject. And unless the subject is strangely in the corner, you simply will not have a soft corner problem.
Personally, I have no high opinion of the 35mm f1.8 Dx at all, when used with any shallow DOF... I find its bokeh to be the least attractive of lenses I can think of right now. To me, that is more important than "sharpness in corners". Also contrast is important, but not often tested (color foto, german magazine, tests for it).
The Sigma 30mm f1.4 happens to have nice bokeh, for the focal length. There are some people that don't like it, due to focus consistency (mainly on Canon DSLR bodies from a ferw generations ago), and there are big fans of the lens (also for its bokeh).
Like mentioned above... it does not matter whether a lens is tested on a D200 or something else. If it is a good lens on a D200, it is a good lens on a D7000.
Great! Thanks, Markus <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' /> Following up on the 'cutoff' issue... It seemed like a good plan to stick to lenses which get 4* or more for optical quality...
The Nikon 35mm 1.8G DX makes that, but the extreme borders have lower resolution, and I wondered if that would be the sort of performance which you'd seen struggle on the D7000?
(I just checked out the Sigma 30mm which clearly doesn't make it at all..!)
Ian
[/quote]
Corners for a prime wide open are not very important at all. The DOF will be so shallow that you almost never will look for "sharp corners".
Corner sharpness tends to be more important with landscape stuff, with bigger DOF and with wide angle. With shallow DOF, you almost never are dealing with a flat subject. And unless the subject is strangely in the corner, you simply will not have a soft corner problem.
Personally, I have no high opinion of the 35mm f1.8 Dx at all, when used with any shallow DOF... I find its bokeh to be the least attractive of lenses I can think of right now. To me, that is more important than "sharpness in corners". Also contrast is important, but not often tested (color foto, german magazine, tests for it).
The Sigma 30mm f1.4 happens to have nice bokeh, for the focal length. There are some people that don't like it, due to focus consistency (mainly on Canon DSLR bodies from a ferw generations ago), and there are big fans of the lens (also for its bokeh).
Like mentioned above... it does not matter whether a lens is tested on a D200 or something else. If it is a good lens on a D200, it is a good lens on a D7000.