Zenza Bronica 50mm f4.5 Zenzanon-PG - Lens
Model Details
Manual focus super-wide-angle lens made for the Bronica GS medium format system by Zenza Bronica in 1983. It has a 25mm equivalent focal length on 35mm full frame. It also has in-between aperture stops. The lens is not recommended (by the manufacturer) to be used together with the Zenza Bronica G 2x and 1.4x tele-converters due to optical degradation. Metal body available in black.
- Zenza Bronica 50mm f4.5 Zenzanon-PG (11 elements, 8 groups)
- Minimum focus distance: 0.5m
- Aperture blades: 5
- Shutter: Electronically controlled Seiko #0 16s - 1/500 + T, B, A
- Size: 98 x 90 mm
- Weight: 791g

Zenza Bronica GS
Bronica’s GS-1 was the company’s only foray into the 6x7cm format. Like other Bronica cameras, the GS-1 is lightweight, electronically-controlled, and modular. It was also the first medium format camera to feature TTL flash metering.
This system uses Bronica’s PG series lenses, with a lens system stretching from 50mm to 500mm (25mm equivalent to 250mm equivalent). The GS-1 was produced until 2002 and is a great alternative to the larger Mamiya RB67 or RZ67.
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