TOKINA 21mm Wide-Auto F 3.8

Focal length: 21mm
Mount: M42
Aperture: F 3.8 - F 16
Min focus distance: 0.30m
Length (from flange): 53/55mm
[+ 27mm for the adapter], rear element protrudes 8mm
Diameter: 77mm
Weight: 280gr.

Some pictures:

A7 and the lens.

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.

F 3.8.

F 8.

F 22.

Closest focus
is 30cm from outermost edge of the lens, F 8. Focus on the program wheel of the camera.

A very nice lens, even wide open. At F 3.8 there is just a hint of shaded edges and it's a bit soft, but gets much better when stopped down. Carefully aligned there is virtually no distortion.