The Canonet QL17 G-III is a 35mm fixed focal length rangefinder camera manufactured by Canon in 1972.  The "QL" designation indicates that the camera uses Canon's "Quick Load" system for easy film loading.  The "G" designation means "Grade Up", which refers to an improvement in quality from previous models.  The "III" indicates that this particular model is the third generation of the Canonet series.  Geared towards the intermediate photography market, the Canonet QL17 G-III enjoyed a long production between 1972-1982.  It was also a popular and bestselling camera with over 1.2 million units produced.            

The Canonet QL17 G-III features a coupled rangefinder with full parallax compensation.  It also has a Copal leaf shutter with shutter speeds from 1/4 to 1/500.  The camera also has an integrated light meter that provides shutter priority and manual shooting modes.  The Canonet QL17 G-III also features a six element 40mm f1.7 lens.  There is a sensor located on the front part of the lens, and it allows for filters to be used without manual compensation of the exposure.    

The Canonet QL17 G-III also has a handy battery check button on the side of the viewfinder eyepiece.  With a press of the red button, the shooter will know by a blue light in the viewfinder if the battery is still good.  The camera was designed to use a PX625 mercury battery (no longer available), but many users are able to sucessfully use the alkaline equivalent.  The circuitry of the camera typically holds up well against the voltage difference, but the metering may be slightly off.  Overall, the Canonet QL17 G-III is well built, small and lightweight camera (approximately 1.35 lbs). 

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