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On Monday, a person on the Canon Rumors forum posted what is claimed to be a feedback form from a recent Canon event. On this form, there are two lenses that currently do not exist in the Canon lineup.
Canon RF 45mm F1.2 STM
This is an interesting lens, and there is no “L” designation. Could Canon be doing some kind of fast lightweight prime lens that wouldn’t directly compete with the RF 50 F1.2L USM and RF 50mm F1.4L VCM?
That would be 4 lenses in and around 50mm if we include the RF 50mm F1.8 STM.
Canon RF 20-50mm F4 PZ
The second lens to appear is an RF 20-50mm F4 PZ, which we think would be for full-frame RF mount cameras. It was highly probable that Canon would release PZ lenses for the segment, as we have the RF-S 14-30mm f/4-6.3 IS STM PZ which was launched with the APS-C EOS R50 V.
We have also seen an optical design patent for an RF 20-50mm F4 PZ. Sometimes patents aren’t exact to products that might be coming to hide things, or any other reason that we don’t know about.
The Survey Form
Conclusion
Canon does have announcements scheduled for November 16, 2025 and November 26, 2025. One of these date is for a camera(s) and another is for lens(es).
Both lenses that are claimed to have appeared on the form would not in any way be simple typos. There’s nothing in the current lineup that is anywhere close. I also think making up these survey form images would be strange considering the lenses.
The RF 45mm F1.2 STM is the most intriguing to us. This sort of lens would be outside of Canon’s usual focal lengths, speed and focus motor for such a lens.
How small could they make this lens?
As we’ve seen with the RF 28-70mm F2.8 IS STM, Canon does have a new focus on small non-L lenses, which I’m here for.
In the end, this could be nothing. We’ll try to confirm if these are definitely coming in the near future.
Original Post Below ( by @esspy2 )
@Canon Rumors:
Small typo: title and screenshot show 45 mm STM, subtitle reads 40 mm. Maybe just correct that 😉
It could be a great option to sit between the RF 50mm f/1.8 and 1.4 lenses.
A 45mm F1.2 STM is really interesting:
- first F1.2 since 2019
- first non L F1.2
- STM in a very fast prime
- 45mm focal length
I read an article on fstoppers about a 43mm FF lens. Apparently, it perfectly mimics how the human eye perceives distances. It really caught my attention and interest and I´d gladly give the lens a try.
For example R7 MkII with RF-S 45mm F1.2 STM ín the first etappe, and R6 MkIII with RF 20-50 F4 Z (plus hopefully two more RF lenses) some days later?
Canon might introduce a non-L F4 Z duo beside the standard F4 L trinity, the 20-50mm being the first member of this budget- friendly hybrid lens line (50-150mm comes next year).
I as well. I've been pleasantly surprised by the smoothness of the PZ function. I'm using mine with the tripod grip and integrated BR-E1. While the LCD can be a little difficult to see in bright sunlight, it's a great kit overall.
1. There’s no “RF-S” in the name.
2. The target audience for the R7 II is mainly wildlife shooters. Canon isn’t interested in developing RF-S portrait primes, which is why they’ve let Sigma cover that niche.
3. The RF 28–70mm f/2.8 was Canon’s obvious response to Tamron. Now they need to answer the wave of inexpensive Chinese full-frame portrait lenses and Nikon’s affordable f/1.4 lineup. A full-frame 45mm f/1.2 STM makes perfect sense: it uses an STM motor, a non-standard focal length, optics that are likely less refined, and possibly no weather sealing—helping it avoid cannibalizing the RF 50mm f/1.4L or RF 50mm f/1.2L.
Canon released a full set of CN-R full frame Cinema prime lenses in early 2024, priced around $4200 ish each. It seems to me that you’d be right about a 42mm F/1.2 being more likely a cinema prime lenses, than a non-L RF lens. Just my guess.
Canon would likely measure the F/stop in cinema T stops, placing it in the lineup between 35 and 50 as a 42mm T/1.3 lens, matching the other T/1.3 primes. (or 40mm T/1.3?)
40mm is common for cine prime lens makers: Zeiss Supreme Prime 40mm T/1.5, Cooke S7 40mm T/2.0, Schneider, etc… Canon would be competing in this space.
Those lenses are:
CN-R14mm T3.1 L F
$4,220.00
Late February 2024
CN-R20mm T1.5 L F
$4,220.00
Late March 2024
CN-R24mm T1.5 L F
$4,220.00
Late January 2024
CN-R35mm T1.5 L F
$3,950.00
Late January 2024
CN-R50mm T1.3 L F
$3,950.00
Late January 2024
CN-R85mm T1.3 L F
$3,950.00
Late January 2024
CN-R135mm T2.2 L F
$3,950.00
Late April 2024