Focal length: 28mm full format, APS-C
Aperture: F 6 - F 22
Min focus distance: 1m
Length (from flange): 23/26mm [+ 11mm for the adapter], rear element protrudes 5mm
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
dish to the right of the big solar panel near the center of the photo.
Closest focus is 85cm from
edge of the lens, F 11. Focus on
the program wheel of the camera.
In full format digital this lens was kind of a deception. As far
as I remember it delivered quite good results on film with a Bessa L.
It's based on the famous Topogon design and it's slow. At max. aperture
F 6 its quite good already, a bit soft at the corners. At F 8 it's just
fine. At F 22 it
only gets soft at the edges due to diffraction, which is much better
than other lenses. This is a problem of the APS-C sensor size, not the
lens (see comparison page). The lens has no close
facilities. However it is extremely small and lightweight,