Canon Canonet QL 17 GIII
A high-end compact rangefinder with autoexposure, built for precision and ease of use in a dense, compact body.
Overview
The Canon Canonet QL 17 GIII is the final and most advanced model in Canon's Canonet series of fixed-lens compact rangefinder cameras. Designed as a high-end compact, it features a 40mm f/1.7 lens and shutter priority autoexposure powered by a CdS meter. It was Canon's "pièce de résistance" in the compact rangefinder line and became a bestseller. The camera uses 135 film and includes a coincident-image rangefinder with a large, bright rectangular spot that appears yellow against a rose-tinted background.
Specifications
| Lens | 40mm f/1.7 |
| Shutter | conventional, mechanical Copal leaf shutter |
| Shutter speeds | bull, 1/4 to 1/500 |
| Flash sync | X flash sync at any speed |
| Film speed range | 25 to 800 ASA |
| Exposure modes | shutter priority autoexposure, unmetered manual exposure mode |
| Metering | CdS cell mounted on the lens |
| Battery | PX625 mercury battery |
| Focusing | coincident-image range-finder |
| Parallax compensation | bright frame-lines that move diagonally down and to the right when the camera is focused in the near-field |
| Aperture diaphragm | five blades |
| Lens sharpness | sharpest at f/4 - f/5.6 |
| Filter compensation | compensates automatically and perfectly for any filter (assuming the filter is uniform across its width) |
Design
The Canonet QL 17 GIII is small for an autoexposure rangefinder of its era but feels dense and solid, with rounded corners and black leatherette covering. It was available in brushed nickel or solid black finishes, the latter being more sought after by collectors. The viewfinder includes two indicators: one shows red lines that flicker when the film is winding properly, and another indicates shutter status—white for uncocked, red for ready. The rangefinder spot is large and bright, with soft edges. The meter is located within the filter thread, and the autoexposure system uses a refined trapped needle mechanism. The aperture mechanism is integrated with the advance lever, shutter release, and meter.
Context
The Canonet QL 17 GIII was the final and highest-end version of Canon's popular Canonet compact rangefinder series from the 1960s and 70s. It represented the peak of the line and was marketed as Canon's "pièce de résistance" in compact rangefinder design. It achieved strong market success and remains a well-regarded model among users of vintage cameras.
Market
The solid black finish is more desirable on the antique market compared to the brushed nickel version. While the original PX625 mercury battery is obsolete, a PX625A alkaline battery can be used as a drop-in replacement. However, this may cause exposure errors—about 1.5 stops underexposed at the start of the battery life and about 1 stop overexposed at the end. Some users report persistent ghost images in the viewfinder due to the beam-splitter, which may affect composition for certain photographers. The distance scale includes two dots that align with the hyperfocal distance at f/8, useful for zone focusing.
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