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I finally got around to conduct a casual lens test for all the Contax Zeiss lenses I own. I shot all lenses wide open, at 2.8, 5.6, 8 and closed at 16 or 22. I moved the camera, so as to keep the framing similar. On the 2 zooms I own, I tested these on both ends and in the middle. I also tested a few lenses with a 2x extender.
In the end I chose a 150×150 frame, cropped these in Graphic Converter into high quality jpegs (@90%). Then I sorted all crops according to their f-stop. During the next days I’ll post the results.
Today I start with 5.6, which is the stop that should be the sweet stop for most lenses (i.e. 2 stops down from wide open). This should give a good indication of how the lenses perform optically. I opened up all cropped jpegs, without knowing which one belonged to which lens. Then I ordered them as to how good they resolved the text – this step is of course up for discussion, but gives a general idea. more…
