
Canon Patent P2026072135 Discovered: New RF 24mm f/3.5, 17-24mm f/4, and 100-400mm f/4.5-5.6 Optical Formulas
A new patent application out of Japan (P2026072135) has surfaced, revealing that Canon is actively exploring several new lens designs for the full-frame RF mount. The patent literature details the optical formulas for three distinct lenses: an ultra-wide zoom, a highly compact wide-angle prime, and an updated telephoto zoom.
While patents do not guarantee production, these designs show Canon’s ongoing focus on reducing the size, weight, and cost of their optics without sacrificing the benefits of the short flange focal distance of the RF mount.
Here is a breakdown of the newly discovered optical formulas:
Canon RF 17-24mm f/4
This is a very interesting focal range for an ultra-wide angle zoom. Rather than pushing to 14mm or 15mm, Canon seems to be testing a slightly tighter 17-24mm range with a constant f/4 aperture.
- Design Focus: The patent literature outlines a negative-lead optical system.
- Expected Benefits: This specific optical arrangement is designed to keep the overall footprint highly compact, resulting in a lower manufacturing cost and a much lighter lens for travel and landscape shooters.
Canon RF 24mm f/3.5
Primed for maximum portability, this looks to be a true “pancake-style” prime lens. Canon has a history of creating incredibly thin, capable lenses, and an RF 24mm f/3.5 would be an excellent walk-around option.
- Design Focus: Features an inner focus mechanism while maintaining a significantly reduced overall length.
- Expected Benefits: This could serve as a high-quality “body cap alternative” for street and everyday photography, keeping the overall camera profile as slim as possible.
Canon RF 100-400mm f/4.5-5.6
Perhaps the most intriguing of the bunch, this formula details a 100-400mm telephoto zoom with a faster f/4.5-5.6 variable aperture compared to the currently available RF 100-400mm f/5.6-8 IS USM.
- Design Focus: Conceptualized with high-speed Nano USM and a travel-friendly size.
- Expected Benefits: By offering a faster aperture at the wide end, this could potentially bridge the gap between the entry-level telephoto options and the heavier L-series glass. It points toward an affordable, lightweight telephoto option that doesn’t completely sacrifice light-gathering capability.
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via j-platpat







