Cameras Ranked

100 Canon RF 100mm F2.8 L Macro IS USM

The Canon RF 100mm F2.8 L Macro IS USM is a prime lens for Canon RF (Full frame) that covers 100 mm at f/2.8, weighs 685 g and focuses as close as 0.26 m. Longest reach (100 mm), dimmest (f/2.8) and narrowest view (100 mm) of the 5 full frame Canon RF prime lenses in its focal range. Among them, it suits you if you carry it all day or travel light, you want more reach at the long end, or your body has no in-body stabilization or you shoot handheld video. If you shoot in low light or want a blurrier background, or you want a wider view at the short end, every other one that does better on brightness, or width gives up reach.

  • f/2.8widest aperture
  • 685 gweight
  • 17bodies it fits
To one scale. Canon RF 100mm F2.8 L Macro IS USM: length 148 mm, diameter 81.5 mm, filter thread 67 mm.148 mmø81.5
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 100mm F2.8 L Macro IS USM: length 148 mm, diameter 81.5 mm, filter thread 67 mm.148 mmø81.5
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

5 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
100 mm1
Widest aperture
f/2.82
Closest focus
0.26 m3
Maximum magnification
1.4x3
Stabilization
8 stops (when paired with compatible cameras)3
Mount
Canon RF3
Covers
Full frame
Type
Prime
Weight
685 g3
Length
148 mm3
Diameter
81.5 mm3
Filter thread
67 mm3
On sale from
Jul 20214
Elements
173
Groups
133
Aperture blades
93
Weather sealed
Yes3
Focus motor
2x Nano USM3
Hood
ET-73C (included)3

Sources

  1. www.canon.at, cited by Wikidata for Focal length (Wikidata checked Oct 9, 2026; we didn't read this page)
  2. Wikidata, checked Oct 9, 2026 (CC0 1.0)
  3. Canon product specifications, checked Oct 6, 2026
  4. global.canon, cited by Wikidata for On sale from (Wikidata checked Oct 9, 2026; we didn't read this page)

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.
  • 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 100mm F2.8 L Macro IS USM3
Diagonal angle of view24° 00′ (Diagonal)
Horizontal angle of view20° 00′ (Horizontal)
Vertical angle of view14° 00′ (Vertical)
Closest focusing distance0.26 m / 0.86 ft
Lens construction13 groups, 17 elements
Diameter and length81.5 mm x 148 mm (Approx.)
Drive system2x Nano USM
Filter size67 mm
Maximum magnification1.4x
Minimum aperturef/32
Diaphragm blades9
Dust and moisture resistanceSupported
Weight685 g (Approx.)
Included lens capLens Cap E-67 II & Lens Dust Cap RF (included)
Included lens hoodLens Hood ET-73C (included)
Included lens caseLens Case LP1222 (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