This lens does not cover full format, it was built for 24x24mm
Focal length: 30mm
Mount: Robot M26
Aperture: F 3.5 - F 16
Min focus distance: 0.45m
Length (from flange): 21/24mm [+ 13mm for 2 adapters]
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 infinity (except
closest focus). These pictures are hand-held out of the window of my
holiday home. To avoid blur by shake, especially at F16, I held the camera against the window cheek.
Closest focus (F8) is only 28cm from
edge of the lens. Focus on
the program wheel of the camera.
lens does not cover full format, it was built for the 24x24mm square
format of the Robot cameras. The adaption to the A7 is easy, the focal
flange distance of the Robots is 31mm. That's not far from the M39 which
is 28.8mm. So you add a 2.2mm adapter to a M39 one and you are there.
M26 to M39 adapters a readily available on the web and they can be
cheap. The Robot lenses are relatively small and they are fine for
This lens is very small and has a multi-blade iris, perfectly round. It has click-stops
for aperture settings. According
to the serial number, this is a modern lens, made in 1974. As
you can see on the sample pictures, there is heavy vignetting in full
format, not visible on the 24x24mm Robot
cameras. The pictures were taken at the end of a winter's day, contrast
is fine for this situation. The lens has extremely good close focussing
capabilities, mine moves way beyond the 3 feet mark.