The Bronica ETR is a 6x4.5 medium format SLR introduced by Zenza Bronica in the late 1970s as the company's first 645-format system, sitting below their 6x6 line and aimed at studio and wedding photographers who wanted a smaller frame and more exposures per roll.

Sales data for the ETR is thin: a single UK auction hammer result from May 2025 saw a body sell for £220, which gives a rough indication of value today rather than a reliable median. Because this is a wholesale saleroom figure, retail asking prices from dealers typically sit higher, and condition, included finder, and a working 120 back all materially affect what the camera sells for.