This lens does hardly cover full format, it was built for 24x24mm
square format.
Focal length: 38mm
Mount: Robot M26
Aperture: F 3.5 - F 16
Min focus distance: 0.5m
Length (from flange): 21/25mm [+ 13mm for 2 adapters]
Diameter: 46mm
Weight: 140gr.
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 infinity (except closest focus).
These pictures are hand-held out of the window of my holiday home, so
there might be blur by shake, especially at F16.
F 3.5.
F 8.
F 16.
Closest focus (F8) is 40cm from
outermost
edge of the lens. Focus on
the program wheel of the camera.
This lens does hardly 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 APS-C.
This lens is very small
indeed and has a multi-blade iris, perfectly round. According
to the serial
number, this is an old lens, made in late 1954. As you can see on
the sample pictures, there is vignetting towards the edges
in full format, not visible on the 24x24mm Robot cameras and getting
worse closing the diaphragm. The lens has very good close focussing
capabilities.
