SIGMA Zoom 28-200mm F 3.8-5.6 UC

Focal length: 28-200mm
Mount: EOS
Aperture: F 3.8 (5.6)- F 22 (F 32)
Min focus distance: 1.5m
Length (from flange): 82/126mm
[+ 26mm for the adapter]
Diameter: 72mm
Weight: 460gr.

This lens doesn't work with my adapter. Although it is EOS Mount,
it works fully open, but when you close the aperture on your Sony, the camera thinks you did, but the lens didn't close, so photos are overexposed because of the aperture staying open. Autofocus works, but is a bit slow. Incompatible Sigma lenses do not work at all with Canon DSLR cameras, the Canon camera gives an error message. I have a Sigma mount version of this lens, as there are no contacts in the adapter, the aperture stays open, but doesn't fool the camera. The sample photos were shot with this version, focussed manually.

Some pictures:

A7 and the lens at 28mm.

A7 and the lens at 200mm.

Sample pictures: You may click on the sample image (except closest focus) for full resolution. The full resolution image opens in a new window, so you can keep it open for comparison. Focus is on the satellite dish to the right of the big solar panel near the center of the photo.

35mm, F 3.5.

80mm, F 4.5.

200mm, F 5.6.

200mm, closest focus is only 25cm from outermost edge of the lens, F 8. Focus on the program wheel of the camera.

As the aperture doesn't close, there is little interest in this lens. At the wide end it's a bit soft at the edges and there are shades on the upper edges. There is no colour cast at the tele end, not as other long zoom lenses. Tele picture quality is o.k. for a wide open zoom lens. It has very good close focus capability.