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p.1 #1 · p.1 #1 · Voigtlander 35 1.4 on A7R - Field Curvature / MTF | |
I picked up a CV 35 1.4 this past week and have just gotten around to shooting with it this morning. I like the handling of the lens, and for the price, it seems like a reasonable RF 35mm solution for the A7R until Zeiss comes out with native FE manual lenses next year.
While the vignetting is extremely strong WO, there is no visible color shift or highly noticeable smearing in the corners. However, I'm a little concerned that either I have a slightly defective copy, or the lens+A7R combo just has some very strange field curvature.
Take a look at these photos (see Dropbox for full all photos at full res). The wall shot is at f4 and almost MFD while the other shot is around 100ft-infinity and from f1.4 to f11 (I did refocus between f2 and f2.8 to account for focus shift). Interestingly, the extreme corners are actually in pretty good shape, but there is a very pronounced ring that is out of focus, and it doesn't really go away until f8.
I've never shot with the CV 35 1.4 before. Is this the normal type of field curvature it exhibits?
Thanks,
Dustin
Edited on Dec 15, 2013 at 01:37 PM · View previous versions
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