This lens does not cover full format.
Focal length: 28mm, 42mm in crop mode
Mount: M39, but have a look at the last paragraph
Aperture: F 2.8 - F 16
Min focus distance: 0.80m
Length (from flange): 18/19mm [+ 11mm for the adapter], rear element protrudes 4mm
Diameter: 48mm
Weight: 45gr.
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.
Uncropped, F 2.8.
F 2.8.
F 8.
F 16.
Closest focus (F8) is 50cm from
outermost
edge of the lens. Focus on
the program wheel of the camera.
As
this lens does not cover full format (unless you want a Lomo style
heavy vignetting), you have to set your camera to crop mode. Wide open
it is very soft at the corners, but gets better stopped down. It's an
extremely small and lightweight lens, the 42mm in crop mode brings it
close to the 45mm standard in the 1930 street photography. It costs
near to nothing, but needs an adaption. And it's a
lens for the APS-C series, like the A5000/6000.
The
original FFD
for this lens is shorter than the 28.8mm for standard M39, it's said to
be 27.5mm. Quite some sellers "forget" to mention it. There is an easy
and quick fix to this, not elegant, but it works. Google "Industar 69
focus fix" and you will find video tutorials. Set the lens to any
aperture, but remember, which one you set. You just have to loosen the
3 screws that hold the ring with the distance scale around the lens,
lift it, turn it over and take off the stop screw inside. Put it back
and let the point for the aperture coincide with the aperture you set.
Rescrew. If it doesn't turn easily, it might be necessary to lift the
ring about 1mm from its original position, it screws nevertheless. You
can now turn the lens way beyond the original infinity stop, just
enough to have infinity with M39 FFD. And there is no stop on the other
side, you could unscrew the lens. So please do not make more than one
full turn. Your distance scale is haywire, but the lens works. Not
elegant, as I said. You could also align the infinity mark to its new
stop and create a new mark for the aperture. Put a little drop of
silver or white paint over the old dot and make a new red one. A better
solution would be to sand down the
threaded ring of your adapter. Please refer to the russian
lens page how to do this.
