Someone gave me three near-mint condition M42 lenses - SMC Takumar 50mm f1.4 (later 7-element version), SuperTakumar 55mm f1.8, and Vivitar (Kiron) 75-205mm f3.8 zoom.
I got a K&F Concepts adapter for Nikon F-mount, with the glass element for infinity focus. The Super-Takumar 58mm and Vivitar zoom have the rear pin and, set to manual, go on my N80 and D90 bodies with the adapter and operate well. But the SMC Takumar 50mm has a rear aperture tab that moves when the aperture ring is turned, in addition to the pin. This tab appears to prevent turning the aperture ring when mounted. In addition the focus ring cannot be set to infinity focus, which represents the maximum projection of the rear lens element back into the adapter.
Is there any modification to this lens that would make it usable? I thought maybe filing the aperture tab off would solve the aperture problem (difficult to do cleanly) but then there's the focus issue.
I got a K&F Concepts adapter for Nikon F-mount, with the glass element for infinity focus. The Super-Takumar 58mm and Vivitar zoom have the rear pin and, set to manual, go on my N80 and D90 bodies with the adapter and operate well. But the SMC Takumar 50mm has a rear aperture tab that moves when the aperture ring is turned, in addition to the pin. This tab appears to prevent turning the aperture ring when mounted. In addition the focus ring cannot be set to infinity focus, which represents the maximum projection of the rear lens element back into the adapter.
Is there any modification to this lens that would make it usable? I thought maybe filing the aperture tab off would solve the aperture problem (difficult to do cleanly) but then there's the focus issue.