Canon RF lens

Canon RF28mm F2.8 STM

28 mm, f/2.8, made for full frame. It mounts natively on 5 of our APS-C cameras; on the EOS R50 it frames like 45 mm.

28 mm · 45 mm equiv. on EOS R50
f/2.8
55 mm filter
120 g

24.7 mm long69.2 mm55 mm filter thread

Drawn from Canon's published size: 69.2 × 24.7 mm. Details simplified.

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On your camera

The view, the weight with the camera (battery and card included) and what the maker says about each pair. It is made for full-frame sensors and covers APS-C with room to spare.

Every camera in our catalogue this lens mounts on: 5
Camera	View (35 mm equiv.)	With the camera	Fit and maker's notes
Canon EOS R100	45 mm	476 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Canon EOS R50	45 mm	495 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Canon EOS R50 V	45 mm	490 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Canon EOS R10	45 mm	549 g	Fits and works Native mount: it fits and works. Neither the lens nor the camera is stabilised; use a faster shutter speed or a support.
Canon EOS R7	45 mm	732 g	Fits and works

What it frames

38 mm45 mm48 mm

Highlighted: this lens on the EOS R50. A zoom's dashed frame is its longest view.

At its closest (23 cm from the sensor) it fills the frame of the EOS R50 with a subject about 19 cm wide.

On the EOS R50, to scale

Side view drawn from the published depth of the camera and length of the lens. 495 g together.

Every lens with a 55 mm thread

Other standard primes for Canon RF

The nearest in focal length, with the numbers that differ.

Sigma 30mm F1.4 DC DN Contemporary48 mm equiv. · f/1.4 · 345 g (+225 g) · 52 mmCompare
Canon RF24mm F1.4 L VCM38 mm equiv. · f/1.4 · 525 g (+405 g) · 67 mmCompare
Sigma 23mm F1.4 DC DN Contemporary37 mm equiv. · f/1.4 · 345 g (+225 g) · 52 mmCompare
Canon RF35mm F1.4 L VCM56 mm equiv. · f/1.4 · 555 g (+435 g) · 67 mmCompare
Canon RF20mm F1.4 L VCM32 mm equiv. · f/1.4 · 519 g (+399 g) · 67 mmCompare

Questions about this lens

Which cameras does the Canon RF28mm F2.8 STM fit?

5 APS-C cameras in our catalogue: EOS R100, EOS R50, EOS R50 V, EOS R10, EOS R7. It is made for full frame, so it also fits the full-frame cameras on its mount.

What does it frame like on APS-C?

28 mm frames like 45 mm on the EOS R50 (1.6x).

What filter size does it take?

55 mm screw-in filters. Every lens with a 55 mm thread.

Where these facts come from

Facts checked 9 Oct 2026 against the makers' specification pages. How we check

Size, weight, filter thread, close focus and magnification are Canon's published figures. We have not tested this lens; for image quality, read reviews from people who have.

Specifications

Mount: Canon RF
Made for: Full-frame sensors (covers APS-C too)
Focal length: 28 mm
Maximum aperture: f/2.8
Lens stabilisation: No
Weather sealing: No
Filter thread: 55 mm
Weight: 120 g
Size (diameter × length): 69.2 × 24.7 mm
Closest focus: 23 cm
Maximum magnification: 0.12x
Autofocus: Yes
Announced: 2023
Note: Pancake