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It's only a matter of time before we see an ultra-wide angle zoom lens for the Canon RF mount (as well as the RF-S mount). It looks like Canon may be trying to go wider than the EF 11-24mm f/4L USM if the bevy of patents are leading to a consumer available product.
This latest patent shows optical formulas for an RF 8-15mm f/4L USM and an RF 16-24mm f/4L USM. The RF 16-24mm f/4L USM doesn't make much sense with the existence of the RF 14-35mm f/4L IS USM. The RF 8-15mm f/4L USM lines up with the EF 8-15mm f/4L USM zoom fisheye.
We have previously reported that a zoom fisheye would be coming to the RF mount in the next year or so, so this may be part of that development.
Japan Patent JP,2023-104025 deals with decreasing the size of a full-frame RF ultra-wide zoom lens.
To obtain high optical performance in the entire zooming range in a small-sized zoom lens having a wide angle of view.
https://www.j-platpat.inpit.go.jp/c1800/PU/JP-2023-104025/5A42F24A88DE05A9C924B00C476F42139B0E0CC33F32042B52D2001A887B0673/11/en
Canon RF 8-15mm f/4L USM
- Focal length: 8.56mm – 14.42mm
- F-number: 4.12
- Half angle of view: 52.47° – 56.32°
- Height: 11.15mm – 21.64mm
- Length Overall: 119.70mm
- Back Focus: 22.47mm – 34.96mm
Canon RF 16-24mm f/4L USM
- Focal length: 16.00mm – 24.00mm
- F-number: 4.12
- Half angle of view: 53.52° – 42.03°
- Height: 21.64mm
- Length Overall: 118.86mm
- Back Focus: 23.30mm – 37.54mm
Canon RF 8-15mm f/4L USM
- Focal length: 8.56mm – 14.42mm
- F-number: 4.12
- Half angle of view: 52.47° – 56.32°
- Height: 11.15mm – 21.64mm
- Length Overall: 119.70mm
- Back Focus: 22.47mm – 34.96mm
119.70 mm is quite a bit longer than the EF 8-15mm f/4L USMPS: I would not use the 35mm focal of a 14/15/16 - 35mm zoom, being convinced that the Summilux 35 produces better pictures and also because my second body is always the M. So, the 16-24 RF would be great for me !
I don't think these 12 & 15mm prime patents have been mentioned here before?:
撮影倍率の高い「RF15mm F2」「RF12mm F2.8」を想定したような光学系の特許出願
What exactly does this mean?
"If you're looking forward to it, the "15mm F2" and "12mm F2.8" will be around, but neither of them have enough image height for full-frame use, and it seems that the design is based on the assumption that the corners will be extended when correcting distortion."
It’s not necessarily a bad thing, the IQ can remain very good and it means smaller, lighter lenses (e.g., it’s why the 14-35/4 can take 77mm filters).
RF 14-35mm f/4L IS – Distortion Correction Testing
Patent application for optical system assuming "RF24-300mm F2.8-5.6 IS", "RF24-240mm F2-5.6 IS", "RF40-350mm F2.8-5.6 IS". Most seem to be quite large, bulky lenses, but one is reasonably small.
If Canon is willing to make tons of 500~999USD f4 lens with IS. The RF 3rd party cries will die off.
Yeah, I already carry the 16-35 f/4 and a 14 f/2.8 together on some very long hikes, so my hope is that something like this actually reduces the burden! I’d expect my 16 to still be a go to just for filler use. I’ve found that I often need a bit wider than my 14, but I still also need it fast. With that said, Sony manages to build that lens for just shy of $3k and it weighs 847g, so it can be done!
A lens no one else makes? The sky is the limit. I thought there was a rumour of something similar at one point, like a 14-21 f/2, to go with the 28-70 f/2. But yes, very big, very heavy, very expensive.
Is the ultimate astro lens coming? Another RF 14-21mm f/1.4L USM mention [CR2] - Canon Rumors
I am looking for a very bright wide angle/fish eye lens, something like F1,8 or F2.0 maximum (I think that Sony has some like that or at least compatible from third parties...).
I have the Canon R5 with the RF 15-35mm f2,8 which is a very good lens. Something like a bit wider like an RF 10mm f 1,8 would be just perfect🙂