Then the problem: The autofocus focuses in any distance. There is a massive fehlfokus ago, an impression of sharpness at about 1 cm object distance - but I really did not want a pure macro lens ....
The fehlfokus occurred in the manner described in all my three cameras (Pentax Kr, K 10 and K 5). After consultation with the Sigma lens at 02:03:12 sent directly to Sigma. After scarce three weeks was back, the readjustment was carried out to ensure course.
Convince the photos finally made. Rich colors and excellent sharpness even at full aperture, with dim nor an increase in sharpness. At maximum aperture a slight vignetting in the corners, which is hardly noticeable. In broadcasting and backlight rare artifacts. The ultrasonic motor provides fast, quiet sharp.
Overall a very good lens that perfectly complements the existing equipment. One star deduction, because such a massive fehlfokus should not leave the plant at a decent quality control. Even if the re-adjustment was not an issue, it is unnecessary labor and time. Unfortunately, yes, I, the customer must pack the lens again, bring to the post office and then wait again for almost three weeks.
