This patent application (2023-149130)shows some interesting and fairly simplistic optics for 70, 75, and 85mm primes. The 85mm primes are unlikely since we already have the Canon RF 85mm F2. 0 IS STM.
It should be noted that the element designs in this patent application are far simpler than the 85mm F2. 0. Most likely because of [. . . ]
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. canonrumors.com2023-10-15 05:52