CANON RF 45mm f/1.4 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.
Features
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.
RF45mm F1.2 STM in Action
Specification
Lens
Focal length
45mm
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
Aperture blades
9
Image Stabilization
None
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
AF / MF switch
Available
Iris ring
None
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