Cameras Ranked

28 Canon RF 28mm F2.8 STM

The Canon RF 28mm F2.8 STM is a prime lens for Canon RF (Full frame) that covers 28 mm at f/2.8, weighs 120 g and focuses as close as 0.23 m. Lightest (120 g), longest reach (28 mm), dimmest (f/2.8) and narrowest view (28 mm) of the 3 full frame Canon RF prime lenses in its focal range. Among them, it suits you if you carry it all day or travel light, or you want more reach at the long end. If you shoot in low light or want a blurrier background, you want a wider view at the short end, or your body has no in-body stabilization or you shoot handheld video, every other one that does better on brightness, width, or stabilization gives up weight and reach.

  • f/2.8widest aperture
  • 120 gweight
  • 17bodies it fits
To one scale. Canon RF 28mm F2.8 STM: length 24.7 mm, diameter 69.2 mm, filter thread 55 mm.24.7 mmø69.2
To scale from the maker's length and diameter, the mount on the left and the filter thread in yellow at the front. The rings are drawn, not measured.

Compare it with another lensAll Canon RF lenses

To one scale. Canon RF 28mm F2.8 STM: length 24.7 mm, diameter 69.2 mm, filter thread 55 mm.24.7 mmø69.2
To scale from the maker's length and diameter, the mount on the left and the filter thread in yellow at the front. The rings are drawn, not measured.

Where it sits

3 lenses

Full frame Canon RF prime lenses in its focal range that state each value, this one included. Each tick is one; the thick one is this one.

Bodies it fits

17 bodies

All cameras, by maker and mount

Specifications

Focal length
28 mm1
Widest aperture
f/2.82
Closest focus
0.23 m3
Maximum magnification
0.17x3
Stabilization
No
Mount
Canon RF3
Covers
Full frame
Type
Prime
Weight
120 g3
Length
24.7 mm (retracted)3
Diameter
69.2 mm3
Filter thread
55 mm3
On sale from
Jul 31, 20234
Elements
83
Groups
63
Aperture blades
73
Weather sealed
No3
Focus motor
Gear-type STM3
Hood
EW-55 (sold separately)3

Sources

  1. www.usa.canon.com, cited by Wikidata for Focal length (Wikidata checked Oct 9, 2026; we didn't read this page)
  2. www.canon.de, cited by Wikidata for Widest aperture (Wikidata checked Oct 9, 2026; we didn't read this page)
  3. Canon product specifications, checked Oct 6, 2026
  4. store.canon.de, cited by Wikidata for On sale from (Wikidata checked Oct 9, 2026; we didn't read this page)
  5. Wikidata: Canon RF 28mm F2.8 STM, checked Oct 9, 2026 (CC0 1.0)

Worked out by code, not stated by a source

  • Read from the lens name: each maker marks the sensor size a lens covers (Sony FE/E, Canon RF/RF-S, Nikon DX, Tamron Di III/Di III-A, Sigma DG/DC); every Fujifilm X lens is APS-C and every Micro Four Thirds lens is Four Thirds.
  • Read from the lens name: Sony marks optically stabilized lenses OSS, Canon IS, Nikon VR, Fujifilm OIS, Panasonic O.I.S., Tamron VC and Sigma OS; a lens from these makers without the mark has no optical stabilization.
  • Prime or zoom, read from the focal length in the lens name.

Each value is checked automatically against the source it links, on the date shown. How we build these pages

† The makers' own tables, row by row, with labels in our plain words (translated where the maker's page isn't in English); each row's numbers are checked against the page it links.

Full specifications†

Show all 15 rows
Full specificationsCanon RF 28mm F2.8 STM3
Diagonal angle of view75° (Diagonal)
Horizontal angle of view65° (Horizontal)
Vertical angle of view46° (Vertical)
Closest focusing distance0.23 m / 0.75 ft
Lens construction6 groups, 8 elements
Diameter and length69.2 mm × 24.7 mm (retracted)
Drive system typeGear-type STM
Filter size55 mm
Maximum magnification0.17x
Minimum aperturef/22
Number of diaphragm blades7
Weight120 g
Included lens capLens Cap E-55 & Lens Dust Cap RF (included)
Lens hood modelEW-55 (sold separately)
Lens bag modelLP811 (sold separately)

How the pick works

  1. Widest aperture3

    Lower wins once they are 0.3 apart.

  2. Weight2

    Lower wins from a 12% gap.

  3. Focal length (longest)2

    Higher wins from a 15% gap.

  4. Focal length (widest)2

    Lower wins once they are 2 mm apart.

  5. Optical stabilization1

    Having it wins.

  6. Closest focus, wide end1

    Lower wins from a 15% gap. Compared only between lenses of the same focal length (widest).

  7. Filter thread0.5

    Lower wins once they are 5 mm apart.

  8. Lead for a pick1

Our pick or our take adds up the importance of each real difference, with these importances and thresholds: a gap smaller than its row's threshold is too close to call and counts as the same. They are our editorial choice, not a measurement, the same on every page, and they never read prices, sales or who sells it.

Paid placements0

How we rank, in full