Bronica ETR repair & common faults
Excellent coverageThe Bronica ETR is a 645 medium format SLR from the mid 1970s, built around interchangeable lenses that carry their own electronic leaf shutter rather than a shutter in the body. Firing depends on a clean electrical path between lens and body and a healthy battery, and metering (where fitted) runs through a separate AE prism finder with its own contact system.
Interchangeable Seiko electronic leaf shutter lenses · body-to-lens electrical contact system · optional AE prism finder with CdS metering · battery-dependent shutter firing · interchangeable 120/220 film backs
Common Bronica ETR faults
Bronica ETR shutter won't fire
Because the shutter lives in the lens and fires electronically, a dead cell or a dirty contact between lens and body will stop it cold, worth checking the battery is fresh before anything else. If a fresh battery doesn't bring it back, the fault is usually in the lens's own shutter circuit or the contact piece and insulating plate behind it, and that's a bench job.
Bronica ETR aperture blades sticking or sluggish
The diaphragm fork and its linked levers open and close the blades every time the shutter cycles, and old lubricant migrating onto the blades is the classic cause of hesitant or incomplete stopping down on this era of lens. It shows up as uneven exposures or a visibly slow, dragging action rather than a crisp snap, and it only gets worse left alone.
Bronica ETR AE finder meter not reading
The AE prism finder meters independently of the body, through its own selector dial, contact pin and main circuit, so a dead or erratic reading points to that finder rather than the camera itself. Worth confirming the ASA dial is set and the finder is seated properly on the body first. If it still won't read, the fault is in the finder's contact pin or circuit board.
Bronica ETR lens won't fire from the body release
Because the shutter release travels from body to lens through a set of electrical contacts and a flexible printed circuit, a lens that fires on its own but not through the body release usually means corrosion or wear at that contact interface rather than a shutter fault. Reseating the lens fully on the mount is worth trying first. Persisting points to the contact set itself.
Bronica ETR dark or fogged frames
Light-tight plates seal the shutter unit inside each lens and the film back seals separately against the body, so fogging or dark bands can come from either point rather than the shutter timing itself. Checking the film back is fully latched is the one thing worth doing before bringing it in. Anything beyond that means the seals or plates need inspecting on the bench.
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Try it now ›Scatto is a reference tool for people who service film cameras. It explains mechanisms and quotes service data, but it cannot see your camera at the bench, so verify anything load-bearing before you act on it.