My friend has a barrel Xenotar 150mm f:2.8 and a Copal 3 shutter. He tried to make adapters with 3D printing, but that did not give acceptable results. Together we modeled the Xenotar and the Copal 3 shutter and made adapter rings for front and back lens elements. This is one of the first testing shooting at full aperture f:2,8 and 1/60 sec exposure time with fill in flash.
The lens is super sharp, but the depth of field is extremely shallow. I exposed several sheets of 4X5 FP4+ and my success ratio for critical sharpness was approx 50%. If you do not want to stop down you should make several exposures.
Here is one example of my first session. The crop is approx the size of 35mm frame. (EDIT: the real sharpness is lost in these internet forums compared to enlargements from negative)
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