Bronica S

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The Bronica S is a 6×6 format focal plane SLR introduced by Bronica in 1961. A simplified version without removable back was released called Bronica C. An improved model called Bronica S2 was released in 1964.

It is the first major revision of Bronicas 6×6 camera system. It has finders and backs that are not compatible with the previous Bronica Z / D models. There were many features no longer on the Bronica S that were available on the previous Bronica cameras. Changes include the removal of the 2 to 10 sec and 1/1250 shutter speeds, along with self-timer, multiple exposure and focus lock.

Improvements include an even more fool proof dark slide system. The camera will not function properly with a dark slide inserted nor can the back be removed without a dark slide. During use; if dark slide is still inserted, the camera actually pushes the dark slide half out to remind you to remove it. Dual cable releases are available, one on the shutter button, the other on the bottom base of the camera. A mirror lock down function is also present with the switch below shutter release.

Multiple exposure

The camera has multiple exposure prevention, but you can make it expose twice on the same frame by

  1. exposing a frame
  2. inserting the dark slide, remove film back
  3. cock the shutter, insert film back, remove dark slide


The Zenzanon 300mm f/4.5 will not mount as it uses the larger bayonet mount.


Introduction 1961
Type 2 1/4 x 2 1/4 (6cm × 6cm) Single lens reflex camera
Film back removable
Film 120 roll film 12 exposures
Finder Fresnel lens and large magnifier
Viewfinder hood interchangeable with pentaprism finder or magnifying hood
Focusing built-in non-removable Helicoid type
Distance Scale 75mm, 50mm, 135mm lenses
Mirror flip down, instant return, automatic mirror system
Diaphragm Auto: 75mm, 50mm, 135mm lenses
Depth-of-Field Depth-of-field can be checked by pressing preview button
Shutter Vertical-travel focal plane shutter
Shutter Speeds B, 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500, 1/1000 and 'X' (1/50)
Film winding winding crank or knob
Dimensions 100mm × 100mm × 140mm
Weight 1.165 kg