Repairing stuck aperture ring on Asahi Pentax SMC Takumar 50mm F1.4 lens.

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Repairing stuck aperture ring on Asahi Opt. Co. (Pentax) SMC Takumar 50mm F1.4 lens (M42).

This is the rubber focus ringed SMC Takumar 50mm F1.4 ans is considered one of the best vintage fast 50mm's available. It is built exactly like the earlier Super-Multi-Coated Takumar. The aperture ring on this lens was stuck at F11, as well as needing a good clean. While the aperture was fixed, I do not know the exact cause of it to getting stuck. It was most likely accumulation of dirt and debris in the lens body and well as deteriorating grease, or improper assembly by the last owner.

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