When Canon introduced the EOS R7 and R10 in 2022 they launched the new RF-S lens system for their APS-C mirrorless cameras. RF-S lenses use the same RF mount as Canon’s full-frame lenses but are designed around the smaller APS-C image circle, which makes them smaller and lighter. Since then, the lineup has grown to 7 RF-S lenses across 5 RF-S bodies (R7, R10, R50, R100, and R50 V).
This post covers everything you need to know about Canon RF-S lenses: the current lineup, how they compare to RF lenses, what happens when you put an RF-S lens on a full-frame body, and how to adapt EF-S lenses if you’re coming from a DSLR.
What is a Canon RF-S lens?
The lens mount on Canon’s APS-C mirrorless cameras is the same RF mount used on Canon’s full-frame bodies, but the smaller APS-C sensor only uses the center portion of a full-frame RF lens. That’s why Canon created RF-S lenses: smaller, lighter optics designed around the APS-C image circle. They share the RF mount, so the same lens can technically attach to a full-frame body, but the optics are built for cropped bodies like the R7, R10, R50, R100, and R50 V.
RF-S lenses can be used on full-frame Canon cameras, but the camera will automatically crop to a 1.6x APS-C area of the sensor when one is mounted. The reverse also works: full-frame RF lenses mount and function on RF-S bodies, just with a 1.6x focal-length multiplier applied to their reported focal length. The mount is the same; the difference is which portion of the sensor each lens covers.
What Canon RF-S lenses are there?
As of 2026, there are 7 RF-S lenses in Canon’s lineup. All numbers in parentheses are 35mm full-frame equivalents (RF-S uses a 1.6x crop factor):
- RF-S 18-45mm F4.5-6.3 IS STM (2022). The standard kit zoom (28.8–72mm equivalent). Small, light, and what ships in most RF-S kits.
- RF-S 18-150mm F3.5-6.3 IS STM (2022). The all-in-one travel zoom (28.8–240mm equivalent). One lens that covers wide to telephoto, ideal for travel and general-purpose shooting.
- RF-S 55-210mm F5-7.1 IS STM (2023). The dedicated telephoto zoom (88–336mm equivalent). Wildlife, sports, and tighter portraits.
- RF-S 10-18mm F4.5-6.3 IS STM (2023). The ultra-wide zoom (16–28.8mm equivalent). Landscapes, interiors, and vlogging.
- RF-S 3.9mm F3.5 STM Dual Fisheye (June 2024). Two fisheye lenses on one mount for stereoscopic VR180 capture. Compatible with Apple Vision Pro spatial video via Canon’s EOS VR System.
- RF-S 7.8mm F4 STM Dual (November 2024). Two-element stereo lens designed for “spatial photos” on Apple Vision Pro and similar headsets.
- RF-S 14-30mm F4-6.3 IS STM PZ (July 2025). Canon’s first RF-S power zoom (22.4–48mm equivalent), aimed at cinematic video on the R50 V and similar bodies.
For the latest RF-S releases and pricing, you can browse all RF-S lenses here.
Can I use Canon RF lenses on a cropped Canon RF-S mirrorless camera?
Although Canon cameras designed for RF-S lenses like the R7 and R10 have a smaller sensor than Canon’s full-frame R-series cameras, RF lenses designed for the full-frame system will work on them. The lenses may appear 1.6 times longer than they do on a full-frame camera. This is due to the focal length magnification factor. As a result, a Canon RF 70-200mm f4L IS USM lens will essentially become a 112-320mm lens, which is ideal for capturing distant details. However, this also implies that some of the lens’s potential is “wasted” because you’re only utilizing a portion of the lens optics, and you’re carrying a larger, heavier lens than an equivalent RF-S lens would be.
Can I use RF-S lenses on a full-frame Canon R system cameras?
Canon RF-S lenses are made for the Canon R7, R10, and R50 cameras, but they also work with full-frame Canon RF cameras like the EOS R6, R5, R3, R, R8, and RP. When using a RF-S lens on a full-frame Canon RF camera you will notice a 1.6x crop. This is because RF-S lenses only cover a portion of the full-frame RF sensor. You’ll also want to make sure your camera’s firmware is up to date to ensure compatibility with the RF-S lenses.
Can I use the Canon EOS R7 or Canon EOS R10 with EF and EF-S lenses?
To make EF or EF-S lenses work with the new Canon R7 and R10 cameras, you will need to use an adaptor. The EF and EF-S to RF lens adapter makes most EF/EF-S lenses work on all RF mount cameras. I highly recommend buying the adapter if you’re coming from a Canon DSLR since it allows most of your lenses to work with Canon’s mirrorless system.
Are Canon RF-S lenses as big as RF lenses?
No, even though the lens mount has the same size, the barrel is smaller since the optics inside are not required to be as big. As a result, Canon RF-S lenses should be smaller compared to Canon RF optics of similar type.
Will there be more Canon RF-S lenses?
Yes. Canon has steadily expanded the RF-S lineup, going from 2 lenses in 2022 to 7 by mid-2025, including the dual stereo lenses aimed at Apple Vision Pro content and the first RF-S power zoom (RF-S 14-30mm PZ). Canon has publicly stated plans to release 6 to 8 new RF lenses per year going forward, with a portion of those dedicated to APS-C. For the latest rumors and announcements, Canon Rumors is the usual source.
One notable gap: Canon doesn’t currently offer an RF-S prime lens. Third-party makers (Sigma, Tamron, Viltrox, and others) are also slowly bringing autofocus RF-mount lenses to market, which gives RF-S users more options as the ecosystem matures.
Canon RF-S Lenses FAQ
What does RF-S mean?
RF-S is Canon’s designation for RF-mount lenses designed specifically for APS-C (“S” for the smaller sensor format) mirrorless cameras. The mount is identical to Canon’s full-frame RF mount, but the optics are scaled down to cover the smaller APS-C image area, which makes RF-S lenses smaller, lighter, and cheaper than their full-frame counterparts.
Which Canon cameras use RF-S lenses?
Five Canon APS-C mirrorless bodies currently use RF-S lenses natively: the EOS R7, R10, R50, R100, and R50 V. RF-S lenses also mount on Canon’s full-frame RF bodies (R8, R6, R6 Mark II, R5, R3, R, RP) but the camera applies a 1.6x crop when an RF-S lens is attached, so you only use the center portion of the full-frame sensor.
Are RF-S lenses worth it compared to adapting EF-S lenses?
For most users, yes. RF-S lenses are designed for the RF mount from the ground up, which means smaller, lighter optics and no adapter to carry. Adapted EF-S lenses still work well via the EF-EOS R adapter and are a good option if you’re coming from a Canon DSLR and already own EF-S glass. New buyers will get a tighter, lighter package with native RF-S lenses.
Is there an RF-S prime lens?
Not from Canon, as of 2026. Canon’s RF-S lineup is currently zoom-only (plus the two specialty dual-fisheye and dual stereo lenses). For a fast prime on an APS-C body, your options are full-frame RF primes (which work fine, just with a 1.6x crop applied), adapted EF or EF-S primes, or third-party RF-mount primes from makers like Sigma and Viltrox.
What is the focal length multiplier for RF-S lenses?
RF-S cameras use a 1.6x crop factor relative to full-frame. To find the 35mm equivalent focal length, multiply the RF-S lens focal length by 1.6. For example, the RF-S 10-18mm covers roughly 16-29mm equivalent, and the RF-S 55-210mm covers roughly 88-336mm equivalent.
If you have questions about the RF-S lineup or specific lenses, drop a note in the comments below.
Do you know if Canon force the crop when installing APSC lenses on full frame camera RF camera? Is there any way to avoid that in the menus? With Sony you can use APSC lenses with full frame mode and then crop afterwards in post for stabilization (video) or crop to edit photography.
To my knowledge there is no way to manually pick the sensor mode but I could be wrong.
The range of lenses is severely limited.If Canon can not produce better quality lenses,at least allow Sigma and Tamron to do so.
Even worse than discontinued M-range.
No one ever talks crop factor if RF-S lens is mounted on R7. if the image circle is designed to fit the crop sensor, it would seem that the R7 with RF-S should have no crop factor, since all of the lens image is used. true or false?
Technically yes Mike, I would guess there is no crop factor since you’re using the full lens. That being said the focal lengths are still relational to a 35mm sensor so it’s good to know that the focal length of the lens listed will be downscaled.