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This is an intriguing patent application (2024-074321) because there are a few different embodiments that deserve a closer look than I originally thought reading through it.
First, the 20-60mm F2.8 would cover a lot of focal length bases for me. I love to shoot a bit wider than 24mm, and 60mm seems a nice compromise between 50 and 70mm. This is a fairly complex lens, but not enough that I would necessarily expect a red ring around it.
The 28-70 and 24-70’s embodiments are far simpler in terms of optical design than the current L’s so we could see these are cheaper non-L’s of constant aperture F2.8’s. This wouldn’t be a bad thing at all, giving people more lens options is always a good thing in my world.
All in all, I think these lenses seem to be sitting in between the consumer STM and the professional series L lenses – something that Canon hasn’t regularly explored but we’d be better off if they did.
Canon RF 20-60mm F2.8
NearMiddleFarFocal Length21.63 41.64 61.25F-Number2.89 2.89 2.89 Half Angle Of View39.77 27.46 19.45 Lens Length (including focal Plane Distance)171.39 150.09 154.91 Back Focus Distance22.99 26.93 30.88
Canon RF 24-70mm F2.8
NearMiddleFarFocal Length24.70 46.61 68.70 F-Number2.89 2.89 2.89Half Angle Of View36.73 24.90 17.48 Lens Length (including focal Plane Distance)171.15 152.40 157.34 Back Focus Distance (mm)22.75 25.47 28.19
Canon RF 28-70mm F2.8
NearMiddleFarFocal Length28.70 49.06 68.70 F-Number2.89 2.89 2.89 Half Angle Of View32.71 23.80 17.48 Lens Length (including focal Plane Distance)158.44 146.78 153.21 Back Focus Distance22.44 23.91 26.15
As with all patent applications, this may or may not end up in an actual patent, but it’s a look into Canon’s ongoing research.
Source: Japan Patent Application 2024-074321
Go to discussion…
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