Tweedehands Bronica SQ-a met Zenzanon-s 150mm f/3.5 CM2554

The Bronica SQ is a 6x6 medium format SLR camera that replaced the Bronica EC as their 6x6 format camera from August 1980[2]. The SQ is often said to mean square.
An interchangeable back system was incorporated that has the ability to use 120 or 220 (12 / 24 ) exposure film backs. The backs contain a ISO speed dial setting that is coupled to metered finders.

In 1982 the SQ-A was released with mirror lockup and a new view finder system now supporting auto exposure. The newer AE finders are not fully compatible with the older SQ cameras, they are unable to mount properly because there are now more electronic connector pins. The film back dark slides are now locked when not attached to the camera. The new dark slides are now grey in color.

The SQ-Ai was a slightly updated SQ-A, announced at the 1990 Photokina, with availability in the US from early 1991[3]. The camera has the ability to use a motor drive. The drive is specifically for the Ai and does not function properly with other SQ models. Also OTF metering is possible. TTL automatic flash requires the use of the SCA connector located on the shutter side of the body for attachment to a SCA flash adapters. When multiple exposure mode is enabled, the right of the viewfinder now displays an square indicator. A longer shutter speed of 16 seconds is added to the body, along with a traditional bulb mode shutter setting instead of just T, but it drains battery power while in use. The 16 second and bulb modes does not work with the ME or MF finders. This camera switches to 4x LR44 batteries that are held by a battery holder. The backs changed slightly, with the ISO dial on the back instead of the top. This makes it much easier to view and change the ISO settings with larger finders. The ISO has increased and can go up to ISO 6400. Exposure compensation is also on the newer (SQ-i) backs. It allows adjustment of up to 2 EV in 1/3 increments.