The Cosinon 50 mm f/ 1.7 MC Auto Lens. Specs. MTF Charts. User Reviews.
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Swirl and bubbles: Quick comparison of Cosinon 50/1.7 and Revuenon 50/1.8. : r/VintageLenses
Cosinon Auto MC 50mm f/1.7 – Sample-Image.com
The Cosinon 50 mm f/ 1.7 MC Auto Lens. Specs. MTF Charts. User Reviews.