The Bronica ETRSi is an improved version of the ETRS, based on its second revision. It features a mirror lockup switch, TTL flash metering with an OTF flash exposure feature, and a red indicator in the viewfinder when multiple exposure mode is enabled. A traditional bulb mode shutter setting is available, though it consumes power. The film advance gearing mechanism has been improved, and the lower half of the body has enhanced grip areas. The lens release has been moved back to the front of the camera, and the film back holder EI has an improved locking dark slide system.