Zenza Bronica Zenzanon-S 1:2.8 f=80mm. Adaptation for DSLR camera

08/11/2015 - 19:28

Author: Ivan K

I pick up a Japanese medium format lens Zenza Bronica Zenzanon-S 1:2.8 f=80mm by chance. It was curious to see what picture is on the APS-C camera.
Also read Zenza Bronica Zenzanon-S 1:2.8 f=80mm Review & Sample Photos

Bronica SQ system has a flange focal distance other than the common Pentacon Six or Hasselblad bayonets and is equal to 85mm, a little bit longer than the standard Hasselblad (82.1mm). As also Bronica bayonet mount diameter 78mm. In addition, it has a built-in Seiko shutter #0. Aperture, though given ring mechanically controlled electronically from the camera.

Bronica SQ Bayonet

As we can see, at first glance, to attach a lens for Nikon cameras is necessary to solve several problems. But in practice, it turned out to be easier than I thought. And So …

Change the mount

I have a Soviet Bayonet “V”-Nikon F adaptor (Hasselblad-Nikon F analog). On Bronica SQ lenses flange focal distance even more. Therefore, I change it to alter its mount under the bayonet “V”, so the lens can be used on medium format and on any other systems through the appropriate adaptor.

As a donor, you can use the mount from some broken medium format lens with bayonet “V” mount. I found at a flea market back part of a medium format lens, so did not have to cripple a good lens.

2.8 f=80mm without bayonet

Zenza Bronica Zenzanon-S 1:2.8 f=80mm without bayonet

Next we see control wires with contacts protruding from the mount and liaise with the camera lens. He gives us no longer needed, it can be simply cut with scissors.

Take the mount with the old Soviet medium format lens. On the side of the lens has a shank skirt width of 4mm. Experience has shown, was to infinity, this skirt we do not need, it is necessary to grind off on a lathe or a sanding disc.

Also, on the ground off the shank to do two washed down at fixing stops helicoid. On photo already screwed version.

Bronica SQ change Bayonet

Places where you need to make gashes

Now we impose on our new mount old Bronica’s bayonet mount and mark up space for screws, as a template and drill holes.

Mount is ready, fasten it to the lens.

adapted Zenza Bronica Zenzanon-PS 80 mm f/ 2.8

Lens with a converted mount

The result was a small flight of infinity, but it is not critical. If you wish, you can put between the lens and the mount washer.

Unlock the aperture

As mentioned earlier, the lens has an electronic aperture control, but the values are set mechanically. Fortunately, it has manual control through a small lever. If we keep it depressed, aperture control work.

So that we can control the aperture manually, simply press the lever and fix it forever. I solved this problem by using super glue smeared lever on each side and press, hold a few seconds. Clay froze and the goal is reached.

Zenza Bronica Zenzanon-S 80 mm f/ 2.8 Glued aperture control lever