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- Production era - 1954-19??
- Catalog number - 16502
- Type - Optical, near-focusing device for Summicron (I) f= 5 cm 1:2. Chrome with black optical portion. Fits between camera and lens.
- Reproduction ratio - 1:8 to 1:17.5
- SOOKY-M - 1956 close focus accessory for Summicron (I) f= 5 cm 1:2 or F = 5 cm 1:2.8 Elmar ; later called SOMKY - 16507
- Reference - Page 40-41 of Dennis Laney's Leica 1984 Accessory Guide courtesy of Mike Butkus