Canon Patent JP 2026-135909: Exploring RF 75mm F1.2, 85mm F1.4, and 100mm F1.8 Optical Designs
A newly published Canon patent application reveals optical formulas for a trio of fast, short-telephoto prime lenses. The documentation outlines designs for a 75mm F1.2, 85mm F1.4, and 100mm F1.8.
Patent Breakdown
The application focuses on delivering optical systems that are physically compact while successfully correcting various aberrations.
- Publication Number: JP 2026-135909
- Publication Date: August 25, 2026
- Application Filing Date: February 13, 2025
- Applicant: Canon Inc.
- Primary Objective: To provide a compact optical system capable of favorably correcting various aberrations.
The Embodiments
The patent details multiple embodiments targeting high-speed portrait and medium-telephoto applications:
- 75mm F1.2: This optical formula would sit between standard 50mm and 85mm offerings, providing extreme light-gathering capability and shallow depth of field in a slightly wider portrait perspective.
- 85mm F1.4: A staple focal length for portraiture. This formula aims to optimize the 85mm F1.4 spec by prioritizing a smaller physical footprint without sacrificing optical correction.
- 100mm F1.8: A lighter alternative to traditional macro or F2.8 telephoto lenses, designed for strong background compression and low-light performance in a compact chassis.
Canon is actively researching ways to shrink the size of fast portrait primes while maintaining the high image quality standards expected from modern RF glass. While patent filings represent internal R&D rather than a definitive product roadmap, the focus on a highly corrected, compact 75mm F1.2 is a particularly notable potential addition to the ecosystem.
Which of these three prime configurations would you most like to see enter production for the RF mount?
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via j-platpat
