A lightweight 45mm prime lens with a super-fast f/1.2 aperture and smooth bokeh effect – one of the best lenses for creative photography, day or night.

Fast aperture, high impact

A lightweight 45mm f/1.2 prime lens delivering real value and dynamic creativity, the RF 45MM F1.2 STM’s wide maximum aperture places it amongst Canon’s fastest lenses – without the professional price tag.

A closer look at the RF 45MM F1.2 STM

Roll over the hotspots to reveal key features that place this compact prime among the best Canon lenses for portraits and low light

Large front element

Capture more light and easily blur the background for smooth bokeh and creative depth-of-field effects – even in low light

The accessible fast lens for advanced photography

Whether you’re looking for the best lens for portraits or a Canon low-light lens, the RF 45MM F1.2 STM is a versatile prime – ideal for travel, street and exploring wide-aperture photography.

Creative depth of field control

Drag the slider from left to right to reveal how the RF 45MM F1.2 STM’s ultra-fast f/1.2 maximum aperture lets you blur backgrounds effortlessly.

Super-fast f/1.2 maximum aperture

Experience greater creative control with a low aperture lens that delivers beautifully shallow depth of field and brilliant low-light performance.

Compact and lightweight, the Canon RF 45mm f/1.2 STM is an affordable prime lens with an extremely fast f/1.2 maximum aperture and a versatile 45mm focal length. Perfect for a walk around the park or a day in the studio, the lens offers exceptionally shallow depth of field and beautiful, expressive bokeh. Thanks to its wide-aperture capabilities and medium focal length, this lens is perfect for portraits, lifestyle content, and low-light work, creating soft images with dramatic focus falloff. An STM motor affords quiet and smooth autofocus performance and full-time manual focus override. The optical design incorporates one aspherical element, which reduces spherical aberrations and distortion.

Additional Details

• Normal-length prime is designed for use with full-frame Canon RF-mount mirrorless digital cameras.
• Bright f/1.2 maximum aperture suits working in difficult lighting conditions and also offers increased control over depth of field.
• STM stepping motor offers fast, quiet, smooth, and accurate autofocus performance that is ideal for video recording as well as still shooting.
• One precision-molded (PMo) aspherical element suppresses spherical aberrations and distortion for high sharpness and accurate subject rendering.

Focal Length - 45mm

Aperture - Maximum: f/1.2

Minimum: f/16

Lens Mount - Canon RF

Lens Format Coverage - Full-Frame

Angle of View - 51° 20'

Minimum Focus Distance - From Camera Sensor: 1.5' / 45 cm

Magnification - 1:7.7 Macro Reproduction Ratio

0.13x Magnification

Optical Design - 9 Elements in 7 Groups

Aperture/Iris Blades - 9

Focus Type - Autofocus

Image Stabilization - No

Filter Size - 67 mm (Front)

Dimensions - ø: 3.1 x L: 3" / ø: 78 x L: 75 mm

Weight - 12.2 oz / 346 g

Packaging Info

Package Weight - 1.225 lb

Box Dimensions (LxWxH) - 7.3 x 5.1 x 4.9"