Zenza Bronica GS-1 6x7 Camera

Employing extremely advanced electronics technology and decades of accumulated experience, Bronica's engineers combined the functions of a large studio camera with the portability of a 35mm camera. The result - Bronica's GS-1. Sophisticated enough for the studio. Convenient enough for the field. The GS-1's main body is designed to be as simple as possible. The lens, viewfinder, film back and other accessories work together with the body to make an integrated unit of great versatility. The GS-1 is the first medium format camera that automatically adjusts the flash by directly metering light through the lens off the film plane. It features Bronica's unique electronically controlled Seiko lens shutter, and a flash that is adjustable for all speeds up to 1/500 second. The GS-1's tough body weighs only 1,830 grams, including all the standard attachments, so it's great on location. This unprecedented portability,
combined with state-of-the-art functions that meet the demanding needs of professionals, make the GS-1 the ultimate medium format single lens reflex camera.


Type 6x7cm format lens shutter single lens reflex camera, w/interchangeable lens, film back, finder and focusing screen system.
Frame Size 55.6x69.0mm
Film 120 and 220 roll film, and Polaroid Pack Film. (Exclusive film backs for each film
Standard Lens Zenzanon-PG 100mm F/3.5 lens; 6 elements in 4 groups; multi-layer anti-reflection coated; 48 angle of view; F22 minimum aperture; 0.75m minimum focusing distance; 72mm filter
Lens Mount Exclusive four claw Bronica GS bayonet mount.
Focusing Helical focusing system built into each lens.
Lens Diaphragm Fully automatic instant reopening lens diaphragm: Equal distant aperture scale
graduations; half-click stops
Shutter Electronic control SEIKO #0 between-lens leaf shutter; shutter speeds TB16 to 1/500 sec. & A
Film Winding One full rotation, or ratchet winding possible.
Mirror Lock Up Mirror lock-up possible with switch lever main camera body for a single or continuous
Multiple Exposure Multiple exposure possible with lever on main camera body.
Film Back Interchangeable: Exclusive film backs for 120, 220 and Polaroid Pack Film; with ASA/ISO film speed dial and exposure compensation dial coupled to the finder with built-in exposure meter
Finder System Interchangeable
Focusing Screen Interchangeable: Full area matte screen (standard)
Flash Synchronization X-setting only (syncs to all speeds up to 1/500 sec.)
Battery Checking Shutter speed LED lights up or flashes when shutter button is pressed half way
Battery Single 6-volt alkaline or silver oxide battery
Dimensions 106.5mm(W) x 117.7mm(H) x 196.5mm(L) (Main body with standard lens, Film Back and Waist-Level Finder).
Weight 1,830 grams (with above accessories, battery not included).