A fungus-filled Mamiya Sekor C 300mm f/5.6

A lovely long lens for the Mamiya 645, unfortunately with fungus on every element.

This well-built lens is in good physical condition and has been well preserved, but it cannot be used like this: fungus covers the entire field of view. Fortunately, it all comes off easily during treatment. The lens design makes the cleaning fairly straightforward.

• Mount: Mamiya 645
• 9-blade diaphragm
• 6 elements in 5 groups.
• Weight: 710 g.