Bronica EC1972

History

After the S2A (1969), Bronica faced pressure from Hasselblad's leaf-shutter system (which offered full flash sync at all speeds) and from its own limitations at slow shutter speeds with the mechanical cloth design. The EC addressed the latter with an electronically timed shutter, extending accurate slow-speed control and enabling future TTL metering integration.

The EC introduced a new lens mount — breaking compatibility with S-mount Nikkors — and was paired with newly designed Zenzanon-EC lenses (some also branded Nikkor-EC for a period in the early years). The EC-TL followed in 1976 with a TTL meter built into the prism finder. The EC and EC-TL lines were then discontinued as Bronica committed to leaf-shutter designs with the ETR 645 system (1976) and SQ 6x6 system (1980).

Why It Matters

The Bronica EC represents the transitional generation of Japanese medium-format SLRs — the moment when electronic shutter control moved from luxury to baseline. For collectors, it is the rarest of the main Bronica 6x6 focal-plane bodies; the S2A was produced in larger numbers and the EC-TL is often preferred for its metering. For working photographers, the EC's battery dependence (the shutter does not operate without power) is its primary practical limitation compared to the fully mechanical S2A.

The EC's electronic shutter does provide genuine advantages in slow-speed accuracy. At speeds of 1s or longer, the mechanical cloth shutters of the S2/S2A era were susceptible to timing drift; the EC's electronic control keeps those speeds reliable — useful for studio and tabletop work.

Lenses & Accessories

Bronica EC mount. Compatible with Zenzanon-S and Nikkor-EC lenses produced for the EC system: the standard kit lens was a 75mm f/2.8. Wider and longer options in the EC mount are less plentiful than in the subsequent SQ system. Film backs from the EC series are specific to this mount and are not cross-compatible with S-mount or ETR/SQ backs. Viewfinder options include the standard folding waist-level hood and a non-metered pentaprism; the metered TTL prism was introduced with the EC-TL.

Sample Photographers / Notable Use

• Japanese studio and commercial photographers of the early-to-mid 1970s used the EC as a Hasselblad alternative where the higher flash-sync of a leaf-shutter system was not required.
• Adopted by photography schools in Japan alongside the S2A during the transitional period between mechanical and electronic medium-format bodies.

References

• Camera-Wiki: Bronica EC
• Wikipedia: Zenza Bronica