Here is a shot from last weekend taken with my 1926 Agfa PD16 Clipper on some Kodak T-Max 400 that expired in 1981. I had no idea about the shutter speed or the aperture (or the true film speed for that matter), so I played it safe and did a stand development in caffenol-CL. The negatives are a little more dense than I would like for scanning, but still workable. The little lens on that old camera did a nice job though. Just a little ‘glow’ in the bright spots, which you would expect from this kind of lens. Still pretty sharp though. I am guessing that it is around f/11 and about 1/30 sec. That puts the film at around iso 50-100 instead of the ‘fresh’ labeled speed of 400!
I know what you are all thinking... "But James, the Agfa PD16 Clipper takes 616 film! How did you make 120 work?" Well, the image area is 6cm x 5cm, so 120 is wide enough. I had a friend 3D print some spool-end extenders that fit into the slots in the 120 spools and had holes for the 616 pins in the camera (I'll add a digi-pic of those later). Then I did a little figuring on the winding since the numbers on the 120 film are meaningless for 6x5. Anyway, it all came out pretty well, but could use some tweaking. I really like the combination of this expired film, the old 3-element lens, the 6x5 aspect ratio and the caffenol development. It gives a 'very' vintage feel to the photos.
James