Nikon F2 @f22 0.45m D700 by koji kawakami

With double helicoids (11~18mm + 16~26mm)
Somehow Ernostar type lens retains a pretty good IQ at close distance.
See > http://www.pbase.com/kkawakami/prakticar_50mm_f24_pancake

other sizes: small medium large original auto

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