Cameras Ranked

11–20 Tamron 11-20mm F2.8 Di III-A RXD

The Tamron 11-20mm F2.8 Di III-A RXD is a zoom lens for Canon RF (APS-C) that covers 11-20 mm at f/2.8, weighs 340 g and focuses as close as 0.15 m at 11 mm, 0.24 m at 20 mm. Heaviest (340 g) of the 3 APS-C Canon RF zoom lenses in its focal range. Among them, it suits you if you shoot in low light or want a blurrier background. If your body has no in-body stabilization or you shoot handheld video, every other one that does better on stabilization gives up brightness.

  • f/2.8widest aperture
  • 340 gweight
  • 17bodies it fits
To one scale. Tamron 11-20mm F2.8 Di III-A RXD: length 84.2 mm, diameter 73 mm, filter thread 67 mm.84.2 mmø73
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. Tamron 11-20mm F2.8 Di III-A RXD: length 84.2 mm, diameter 73 mm, filter thread 67 mm.84.2 mmø73
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

APS-C Canon RF zoom 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
11-20 mm
Widest aperture
f/2.8
Closest focus
0.15 m at 11 mm, 0.24 m at 20 mm1
Maximum magnification
0.25x at 11 mm, 0.131579x at 20 mm1
Stabilization
No
Mount
Canon RF1
Covers
APS-C
Type
Zoom
Weight
340 g1
Length
84.2 mm1
Diameter
73 mm1
Filter thread
67 mm1
On sale from
Dec 12, 20241
Elements
121
Groups
101
Aperture blades
71
Hood
Flower-shaped hood1

Sources

  1. Tamron product specifications, checked Oct 6, 2026

Worked out by code, not stated by a source

  • Focal length and widest aperture as the lens's own name states them.
  • 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 specificationsTamron 11-20mm F2.8 Di III-A RXD1
Diagonal angle of view101°44'- 68°7' (for CANON RF mount)
Lens mount typeCANON RF Mount
Optical element and group count12 elements in 10 groups
Minimum object distance wide0.15m (5.9 in) (WIDE)
Minimum object distance tele0.24m (9.4 in) (TELE)
Maximum magnification wide1:4 (WIDE)
Maximum magnification tele1:7.6 (TELE)
Filter thread diameterΦ67mm
Maximum lens diameterΦ73mm
Lens length84.2mm / 3.3in (for CANON RF mount)
Lens weight340g / 12oz (for CANON RF mount)
Number of aperture blades7 (circular diaphragm)
Smallest aperture settingF16
Included accessoriesFlower-shaped hood, Front cap, Rear cap
Product release dateDecember 12, 2024 (CANON RF Mount)

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