Canon RF45mm F1.2 STM
The RF45mm F1.2 STM lens is a great option for creators who want an affordable and lightweight setup. It delivers wide-aperture performance, stunning low-light results, and soft, expressive imagery. Whether you’re taking portraits, lifestyle content, or everyday stories, it’ll give your work a polished look, even straight from the camera.
Product Highlight
Standard focal length prime with fast f/1.2 aperture.
Large diameter lens, but lighter in weight.
PMo aspheric lens reduces aberrations.
Gear-type STM autofocus with magnetic detection system.
Dedicated control ring.
Product Feature
Light and Affordable
The RF45mm F1.2 STM combines a large RF mount with a short back focus and advanced digital correction. A compact, affordable lens that still delivers the stunning F1.2 performance you expect.
Fastest Wide Open
The wide f/1.2 aperture creates stunning bokeh, making subjects pop with a three-dimensional effect. And thanks to the fast aperture, it shines in low light, allowing you to capture action at faster shutter speeds.
Tech, Meet Optics
Canon’s first use of a PMo aspheric lens in an F1.2 design helps minimize aberrations for sharper, more accurate images. Combined with the RF mount’s large diameter and short back focus, this allows for a compact build without sacrificing optical performance.
Step in and Focus with Confidence
The RF45mm F1.2 STM uses a gear-type STM motor paired with a magnetic detection system for smooth, precise autofocus. This keeps the lens compact and lightweight while ensuring your subject stays sharp, even in challenging lighting or fast-paced shooting.
What You See, I See
The 45mm focal length is like seeing how you see with the naked eye, giving you a natural perspective and framing that feels just right.
Control at Your Fingertips
A dedicated customizable control ring on the front of the lens lets you assign functions like ISO, White balance, etc. for quick adjustments during shooting.
Product Specification
Lens
Maximum and minimum aperture
f/1.2 – f/16
Lens mount
Canon RF mount (metal)
Compatible cameras
Canon EOS R-series, including APS-C sensor models
Minimum focusing distance (approx.)
1.5 feet / 17.7 in. / 0.45m
Maximum magnification
0.13x
Field of view, at max. magnification
10.4 x 6.9 in. (263 x 175mm)
Angle of view (diagonal)
51° 20'
Optical Design
Lens construction
9 elements, in 7 groups
Special elements
(one) Aspheric element
Lens coating
SSC (Super Spectra Coating)
Filter size (diameter)
67mm Ø
AF
Focus drive system
STM (Stepping motor; gear type)
Full-time Manual focusing
Available
Floating focus system
None
Dual Pixel CMOS AF coverage (Horizontal x Vertical)
Approx. 100% x 100% (Whole Area subject detection); Approx. 90% x 100% (manual AF Area positioning)
Exterior Design
Control Ring
Available, with click-stops
Manual focus ring
Available
Lens Function button
None
Distance scale
None
(electronic distance scale in viewfinder / LCD screen available, in red Shooting menu, on compatible EOS R-series cameras)
Distance limiter switch
None
Dust / weather-resistant construction
None
Tripod collar on lens
None
Dimensions / Weight
Maximum outer diameter x Length (approx.)
3.1 in. x 3.0 in. (78mm Ø x 75mm)
Weight (approx.)
12.2 oz. / 0.76 lb. / 346g
Accessories
Lens hood (optional accessory)
Canon ES-73B hood (bayonet mount, attachable in reverse)
Lens cap
Canon Lens Cap E-67 II
Dust (rear) cap
Canon Lens Dust Cap RF
Lens case (optional accessory)
Canon Lens Case LP1116
Extension tubes
None for RF lenses
Close-up Lenses 250D / 500D
Not compatible
Canon RF Extender 1.4x / 2x
Not compatible
Canon Gelatin Filter Holder III / IV
Not compatible
Rear gelatin filter holder
None
