The Petri 7 is a fixed-lens 35mm rangefinder camera made by Petri/Kuribayashi in 1961. It replaced the Color Super series of rangefinders (and like them includes the phrase 'color corrected super' in the main badge). In style, the camera closely resembles the Canonet of the same year, but is somewhat more basic in its features (it has match-needle exposure control, rather than the Canonet's auto-exposure). It has a coated 45mm lens, available as an f/2.8 or f/1.8; these are presumably similar to the lenses on the Color Super cameras; a Tessar-type f/2.8 and a six-element f/1.8. The lens is set in a leaf shutter, giving speeds from 1 to 1/500 of a second, plus 'B'. This is synchronized for flash, with a switch on the lens barrel to select between X and M synchronization. There is also a PC socket on the lens barrel, and a cold shoe. The shutter release button is threaded for a cable release. The manual claims the release needs only very light pressure, helping to avoid camera shake. The camera has a selenium meter, with the sensor arranged as a ring around the front of the lens (Petri call this arrangement the Circle-Eye), and with the meter reading shown in the viewfinder as a match-needle display. The meter's range is Light Value 7 to 17 at 100 ASA. Film advance is by a lever on the top plate. There is a double-exposure prevention interlock, which cannot be overridden. There is a frame counter, in the hub of the film advance lever. Rewind is by a folding crank, with a rewind-release button in the base.