Cameras Ranked

50 Canon RF 50mm F1.2 L USM

The Canon RF 50mm F1.2 L USM is a prime lens for Canon RF (Full frame) that covers 50 mm at f/1.2, weighs 950 g and focuses as close as 0.4 m. Heaviest (950 g) of the 4 full frame Canon RF prime lenses in its focal range. If you want something lighter to carry all day, look at the Canon RF 45mm F1.2 STM.

  • f/1.2widest aperture
  • 950 gweight
  • 17bodies it fits
To one scale. Canon RF 50mm F1.2 L USM: length 108 mm, diameter 89.8 mm, filter thread 77 mm.108 mmø89.8
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 50mm F1.2 L USM: length 108 mm, diameter 89.8 mm, filter thread 77 mm.108 mmø89.8
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

4 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
50 mm1
Widest aperture
f/1.21
Closest focus
0.4 m2
Maximum magnification
0.19x2
Stabilization
No
Mount
Canon RF2
Covers
Full frame
Type
Prime
Weight
950 g2
Length
108 mm2
Diameter
89.8 mm2
Filter thread
77 mm2
Elements
152
Groups
92
Aperture blades
102
Weather sealed
Yes2
Focus motor
Ring-type USM2
Hood
ES-83 (included)2

Sources

  1. www.canon.co.uk, cited by Wikidata for Focal length, Widest aperture (Wikidata checked Oct 9, 2026; we didn't read this page)
  2. Canon product specifications, checked Oct 6, 2026
  3. Wikidata: Canon RF 50mm F1.2 L USM, 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 16 rows
Full specificationsCanon RF 50mm F1.2 L USM2
Diagonal angle of view46°00′ (Diagonal)
Horizontal angle of view40°00′ (Horizontal)
Vertical angle of view27°00′ (Vertical)
Closest focusing distance0.40 m / 1.31 ft
Lens construction9-15
Diameter and length89.8 x 108 mm (Approx.)
Drive systemRing-type USM
Filter size77 mm
Maximum magnification0.19 x
Minimum aperture16
Diaphragm blades10
Anti-dust and moistureSupported
Weight950 g (Approx.)
Included lens capLens Cap E-77II & Lens Dust Cap RF (included)
Included lens hoodLens Hood ES-83 (included)
Included lens caseLens Case LP1319 (included)

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