[quote name='mst' timestamp='1312806569' post='10499']
Yes, if you want tests that are comparable within the whole test system.
I know you're interested in macro performance, but as Klaus already said, we simply cannot do these tests, mainly because we'd have to find someone who is able to produce a decent test chart. That chart would have to be 24x36mm in size (or maybe 48x72mm if you can lie with 1:2 MTF data) and printed at almost infinite resolution.
-- Markus
[/quote]
In theory such a "chart" could be custom-created by the semiconductor industry. We are talking about a mask equivalent to about 20x of the resolution of an image sensor ... just consider the costs for this. Assuming the pixel density of the upcoming NEX7/A77 sensor we would talk about a gigapixel charts printed on 36x24. In practice we would face all sorts of alignment and focusing problems. Not to mention centering issues. The margin of error would be extreme.
Regarding our findings - I think its viable to assume that they are at least valid till a max. magnification of 1:5 for a macro lens (with floating elements). That should be good enough anyway.
Yes, if you want tests that are comparable within the whole test system.
I know you're interested in macro performance, but as Klaus already said, we simply cannot do these tests, mainly because we'd have to find someone who is able to produce a decent test chart. That chart would have to be 24x36mm in size (or maybe 48x72mm if you can lie with 1:2 MTF data) and printed at almost infinite resolution.
-- Markus
[/quote]
In theory such a "chart" could be custom-created by the semiconductor industry. We are talking about a mask equivalent to about 20x of the resolution of an image sensor ... just consider the costs for this. Assuming the pixel density of the upcoming NEX7/A77 sensor we would talk about a gigapixel charts printed on 36x24. In practice we would face all sorts of alignment and focusing problems. Not to mention centering issues. The margin of error would be extreme.
Regarding our findings - I think its viable to assume that they are at least valid till a max. magnification of 1:5 for a macro lens (with floating elements). That should be good enough anyway.