Aperture adjustment on an Asahi Super-Takumar 55mm f/2
Over time and with vibration, the ring that sets the diaphragm position may shift and throw the aperture out of adjustment. The intervention is fairly simple and quick: remove the front optical group to reach the adjustment…
Over time and with vibration, the ring that sets the diaphragm position may shift and throw the aperture out of adjustment. The intervention is fairly simple and quick: remove the front optical group to reach the adjustment screws. Threadlocker can be applied when reassembling to keep the screws from moving again.
- 49 mm front filter thread.
- 6-blade diaphragm
- 6 elements in 5 groups.
- Minimum focusing distance: 45 cm.
- Weight: 215 g.
