Wide-angle zoom · APS-C

Tokina AT-X 11-20 F2.8 PRO DX

The Tokina AT-X 11-20 F2.8 PRO DX is a APS-C zoom lens (11–20 mm, f/2.8) for Canon EF and Nikon F. It belongs to the wide-angle zoom class — ideal for landscapes, architecture, interiors and astrophotography.

11–20 mmf/2.8Canon EFNikon F
11–20 mm
Focal length
f/2.8
Maximum aperture
104°–70°
Diagonal angle of view (APS-C)
APS-C
Designed for
1.8×
Zoom ratio

Specifications#

Brand
Tokina
Model
AT-X 11-20 F2.8 PRO DX
Lens type
Wide-angle zoom
Focal length
11–20 mm
Maximum aperture
f/2.8
Image circle
APS-C (23.5×15.6 mm)
Mount(s)
Canon EF, Nikon F
Projection
Rectilinear
Lensfun correction profile
Yes — distortion/vignetting/TCA

Equivalent focal length on different cameras#

Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).

Camera formatAt 11 mmAt 15 mmAt 20 mmEquiv. aperture (DoF)
APS-C16 mm · 104°22 mm · 86°30 mm · 70°f/4.2
APS-C (Canon)18 mm · 101°24 mm · 84°32 mm · 68°f/4.5
Micro Four Thirds22 mm · 89°30 mm · 72°40 mm · 57°f/5.6

Depth of field & background blur#

Computed on its native APS-C format (CoC 20 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index. Full table: 14 mm f/2.8 on aps-c.

FocalApertureat 1 mat 2 mat 5 mat 10 mHyperfocalBlur @2 m
11 mmf/2.81.12 m19.0 m∞∞2.22 m0.1%
11 mmf/42.16 m∞∞∞1.56 m0.1%
11 mmf/8∞∞∞∞78.4 cm0.0%
15 mmf/2.850.9 cm2.52 m∞∞4.12 m0.2%
15 mmf/477.6 cm5.27 m∞∞2.89 m0.1%
15 mmf/82.58 m∞∞∞1.45 m0.1%
20 mmf/2.827.3 cm1.17 m12.7 m∞7.32 m0.3%
20 mmf/439.8 cm1.82 m190 m∞5.13 m0.2%
20 mmf/889.9 cm7.74 m∞∞2.58 m0.1%

Handheld & night-sky limits#

NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).

BodyMin. handheld shutter (longest focal)500 rule at 11 mmNPF at 11 mm, f/2.8
APS-C1/30 s30 s20 s
APS-C (Canon)1/30 s28 s19 s
Micro Four Thirds1/40 s23 s18 s

Compatible cameras#

Bodies in our database with a native Canon EF and Nikon F mount. Full-frame bodies switch to an APS-C crop with this lens.

Adapt it to other systems#

Sony E-mountCanon RFNikon ZFujifilm X-mountMicro Four ThirdsL-MountCanon EF-MFujifilm G-mountHasselblad XCDNikon 1 (CX)Pentax QSamsung NXNikon FPentax K

Similar lenses#

Frequently asked questions#

Is the Tokina AT-X 11-20 F2.8 PRO DX full frame?

No — it is designed for APS-C sensors. On a full-frame body it vignettes or triggers crop mode.

What is the Tokina AT-X 11-20 F2.8 PRO DX equivalent to on APS-C?

Its focal length is already the real value for APS-C: 11–20 mm frames like 17–31 mm on full frame.

What is the Tokina AT-X 11-20 F2.8 PRO DX good for?

As a wide-angle zoom it suits landscapes, architecture, interiors and astrophotography.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources

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