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Bayonet mount lens

I made an adapter (the World Famous Kadapter) for Praktica B and Pentax K bayonets for canon, so I get to play with these lens too.
Nowhere near the collection I have in M42, but it's a new field.

Chinon "auto" 50mm f1.7

Pentax K mount.

Nikon Nikkor 50mm f1.2 AIS

Nikon bayonet mount.

Pentax SMC Takumar 50mm f1.2

Pentax K mount.