Canon Patents

Patent: RF prime lenses including an RF 24mm f/1.4L USM and RF 50mm f/1.4 USM

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Japan Patent 2021-18277A shows off a bunch of optical formulas for various fast prime lenses for the RF Mount.

Included in this patent are two 24mm f/1.4 optical formulas, as well as an RF 28mm f/1.8 (Yes Please!), a 35mm f/1.8 and a lens that would likely be quite popular, an RF 50mm f/1.4.

I think it’s safe to say that we will see an RF 24mm f/1.4L USM at some point in the next year or two. I’ve been doing this site for 13 years now, and we’re all still waiting for a new 50mm f/1.4 lens from Canon. I can already see the “Shut up and take my money” memes.

Canon RF 24mm f/1.4L USM
Focal Length 24mm
F Number 1.40
Half Angle of View 42.03°
Image Height 21.64mm
Lens Length 120mm
Backfocus 15mm
Canon RF 24mm f/1.4L USM
Focal Length 24mm
F Number 1.40
Half Angle of View 42.03°
Image Height 21.64mm
Lens Length 120mm
Backfocus 15.79mm
Canon RF 24mm f/1.8
Focal Length 24mm
F Number 1.80
Half Angle of View 42.03°
Image Height 21.64mm
Lens Length 110mm
Backfocus 15.06mm
Canon RF 28mm f/1.8
Focal Length 28mm
F Number 1.80
Half Angle of View 37.69°
Image Height 21.64mm
Lens Length 100mm
Backfocus 15.85mm
Canon RF 35mm f/1.8
Focal Length 35mm
F Number 1.80
Half Angle of View 31.72
Image Height 21.64mm
Lens Length 100mm
Backfocus 15mm
Canon RF 50mm f/1.4
Focal Length 50mm
F Number 1.40
Half Angle of View 23.40°
Image Height 21.64mm
Lens Length 100mm
Backfocus 15mm

H. Jones

Photojournalist
Aug 1, 2014
514
784
I know it's a hotly contested topic, but I still believe that the RF 50mm F/1.2 was priced so high to give room for a ~$1000 50mm F/1.4L, not at all unlike the 85mm range in the EF mount.

Other than that, the RF 24mm F/1.4L will be a nice lens, though I would feel that a 35mm L series option would be a higher priority.
 

SteveC

R5
CR Pro
Sep 3, 2019
2,043
1,899
That 50mm would basically replace the EF f/1.4, which badly needs replacing. I'd probably go for that one, eventually, actually selling the old lens even though I could theoretically use it on my EF-M cameras.

They don't seem to be thinking of an 85mm f/1.8 though!
 

BakaBokeh

EOS 90D
CR Pro
May 16, 2020
164
321
As someone who learned photography with the EF 50 1.4 as my main lens, I can't wait for an RF version. I have the RF 50 f1.2, but its girth is enough to make me leave it at home sometimes. The 1.4 would never leave my bag.
 
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usern4cr

R5
CR Pro
Sep 2, 2018
821
910
Kentucky, USA
Yes! I think the RF 50mm f1.4 (L hopefully) would be a great lens! Hopefully with a big max. magnification value if at all possible.
Come on, Canon, show us your lenses, and we'll show you the money! :LOL:
 

Kiton

Too deep in Canon to list! :o
Jun 13, 2015
93
62
The 50 f1.4 is a no-brainer. The EF is a wretched lens in terms of build, AF and general unreliability.
The IQ is representative of the era in which it was introduced and it delivered spectacular images of dinosaurs in its day.
Agreed, I had two different ones, gave one to my daughter, after a while she gave it back! Sold the other one. the STM 50 is way better than most production modes of the 1.4. I am told once in a while they made a good one, I have never seen it, but some people say the got the odd diamnond in the rough!

I would go for 28mm too.
 
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jolyonralph

EOS R5 Mark II
CR Pro
Aug 25, 2015
1,391
812
London, UK
www.everyothershot.com
That 50mm would basically replace the EF f/1.4, which badly needs replacing. I'd probably go for that one, eventually, actually selling the old lens even though I could theoretically use it on my EF-M cameras.

They don't seem to be thinking of an 85mm f/1.8 though!
They have an 85mm f/2.0 so it would be VERY wishful thinking to think there would be an f/1.8 any time soon.
 

Exploreshootshare

EOS M6 Mark II
Oct 31, 2020
63
60
A 50mm F1.4 non-L priced kinda like the RF 35 F1.8 would be very sweet. Since the F1.8 is very affordable I guess it could happen.

Also, I am very glad to hear that others had trouble with the EF 50mm F1.4 as well. I once "upgraded" from the nifty fifty but since I so many difficulties with this lense I "downgraded" again... Now, I can actually blame it on the lense
 

Fran Decatta

EOS R6
Mar 6, 2019
77
74
A 50mm 1.4 would be great! (with USM and better IQ than the 1.8, please).
The 35 1.8... makes me wonder why they need to do another one (may be with USM? non IS-macro and pancake?)
I wish to see soon the 24 1.8 If it small and "affordable" probably will fit in my bag.
My GF wish to have that 28 1.8 so bad! (she was using it a lot when she was a nikon user)
 

drhuffman87

Eos R, RF24-105 F4L, RF85 F2, EF200 F2.8L II
Nov 5, 2020
10
15
www.drhuffmanphoto.com
I know it's a hotly contested topic, but I still believe that the RF 50mm F/1.2 was priced so high to give room for a ~$1000 50mm F/1.4L, not at all unlike the 85mm range in the EF mount.

Other than that, the RF 24mm F/1.4L will be a nice lens, though I would feel that a 35mm L series option would be a higher priority.

I can’t quite justify paying 2k for a lens, but a 50 mm 1.4L priced similarly to the 24-105 4L would be right up my alley. RF glass is just so optically precise and sharp that it makes EF glass nearly feel broken haha.
 

gbc

EOS M6 Mark II
Oct 19, 2018
65
85
The 50 f1.4 is a no-brainer. The EF is a wretched lens in terms of build, AF and general unreliability.
The IQ is representative of the era in which it was introduced and it delivered spectacular images of dinosaurs in its day.
My thoughts exactly. I was going to buy the RF 50 1.8, but I will definitely wait to replace my EF 50 1.4. It's a lens I need most in low light situations, but unfortunately it's terrible at AF in low light situations. If they can keep the size the same as the EF version, it'll definitely be my go-to lens.