The Canon IIB (Exp Model) is a 35mm screw-mount rangefinder camera produced by Canon in Japan. It is an experimental or prototype variant within the Canon II-series of post-war rangefinders.

Sales data for this experimental variant is extremely thin: a single recorded UK auction hammer result of £384 from 2007 is the only reference point available today. With just one data point at saleroom level, any current estimate of what this camera is worth or sells for is provisional, and condition, provenance documentation, and prototype status would heavily influence price.