Portrait / short tele prime · Full frame

Canon EF 135mm f/2 L USM

The Canon EF 135mm f/2 L USM is a full frame prime lens (135 mm, f/2) for Canon EF. It belongs to the portrait / short tele prime class — ideal for head-and-shoulders portraits with flattering perspective and creamy backgrounds.

135 mmf/2Canon EF
135 mm
Focal length
f/2
Maximum aperture
18°
Diagonal angle of view (Full frame)
Full frame
Designed for

Specifications#

Brand
Canon
Model
EF 135mm f/2 L USM
Lens type
Portrait / short tele prime
Focal length
135 mm
Maximum aperture
f/2
Image circle
Full frame (36×24 mm)
Mount(s)
Canon EF
Projection
Rectilinear
Autofocus motor
ultrasonic (USM)
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 135 mmEquiv. aperture (DoF)
Full frame135 mm · 18°f/2.0
APS-C202 mm · 12°f/3.0
APS-C (Canon)216 mm · 11°f/3.2
Micro Four Thirds270 mm · 9°f/4.0

Depth of field & background blur#

Computed on its native Full frame format (CoC 30 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: 135 mm f/2 on full frame.

FocalApertureat 1 mat 2 mat 5 mat 10 mHyperfocalBlur @2 m
135 mmf/20.6 cm2.5 cm16.0 cm65.0 cm304 m13.6%
135 mmf/41.1 cm4.9 cm32.1 cm1.30 m152 m6.8%
135 mmf/82.3 cm9.8 cm64.3 cm2.64 m76.1 m3.4%

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 135 mmNPF at 135 mm, f/2
Full frame1/125 s4 s2 s
APS-C1/200 s2 s1 s
APS-C (Canon)1/200 s2 s1 s
Micro Four Thirds1/250 s2 s1 s

Adapt it to other systems#

Frequently asked questions#

Is the Canon EF 135mm f/2 L USM full frame?

Yes — it covers the full 36 × 24 mm frame.

What is the Canon EF 135mm f/2 L USM equivalent to on APS-C?

On a 1.5× APS-C body it frames like 202 mm, and like 216 mm on Canon APS-C.

What is the Canon EF 135mm f/2 L USM good for?

As a portrait / short tele prime it suits head-and-shoulders portraits with flattering perspective and creamy backgrounds.

Sources & licences#

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