Canon EF 50mm f/1.4 Patent Diagram
A recently published patent application from Canon reveals the development of new 50mm f/1.4 and 35mm f/1.4 lenses, which use similar optical formulas. We know the new EF 35mm f/1.4L II USM lens is due any day now but a 50mm f/1.4 lens hasn’t really been on the radar even though the current EF 50mm f/1.4 USM lens is getting quite old.
Canon EF 35mm f/1.4 Patent Diagram
The close focus distance of 300mm on the 35mm lens matches up pretty close to the rumored 280mm close focus distance on the coming 35mm f/1.4L.
Current Canon 50mm f1.4 USM Lens
The 50mm f/1.4 is specified to have a 450mm close focus distance and be slightly shorter overall than the 35mm f/1.4 in the same patent application.
This application was filed with the USPTO on January 20, 2015 and published on July 23, 2015. You can read it for yourself here.
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