doi_50mm_f2.8-c

doi_50mm_f2.8-d

DOI [DO Industries] 50/2.8

AKA Hoya / Osawa Tominon EL / Beseler ColorPro / Omicron EL / Yashica enlarger lens.

Category: Enlarger Lenses Tags: 2.8, 50, 50mm, do, doi, enlarger, enlarging, f2.8, industries, lens

Specifications
Reviews

Weight	95 g
Dimensions	50 mm
Focal Length (mm)	50
Max Aperture (f)	2.8
Min Aperture (f)	16
Aperture Blades	8 (Straight)
Elements	6 / 4
Image Circle (mm)	46
Sharp (Far)	87.5%
Rear Mount	M39
Front Thread	40.5×0.5mm
Flange-Focal Distance (mm @ ∞)	43
RF/L Extension (mm)	23
Production	1979-1990
Serial Numbers	10295, 10330

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