Canon EF 40mm F/2.8 STM



The Canon EF 40mm F2.8 STM is a very slim, very lightweight pancake-style prime lens for both full-frame and APS-C Canon DSLR cameras. It features a stepper motor for fast, quiet focus, particularly important with the contrast-detection method of autofocus used for live view and video. Its optical construction includes an aspherical element and coatings optimized to reduce flare. Its closest focus distance is a mere 30cm, and a circular 7-bladed aperture ensures pleasant rendition of out of focus areas.

The EF 40mm f/2.8 STM is a lens whose impressive image quality belies its low price and tiny size. For APS-C users it’s a tiny, inexpensive companion to a kit zoom, and on full frame it offers a great option for general shooting. It’s taken a while for Canon to come to the pancake party, but the 40mm takes its place alongside its peers as one of the best examples of its type.

SKU: 003835 Categories: ,
Principal specifications
Lens type Prime lens
Max Format size 35mm FF
Focal length 40 mm
Image stabilization No
Lens mount Canon EF
Maximum aperture F2.8
Minimum aperture F22
Aperture ring No
Number of diaphragm blades 7
Aperture notes Rounded aperture
Elements 6
Groups 4
Special elements / coatings 1 aspherical element
Minimum focus 0.30 m (11.81)
Maximum magnification 0.18×
Autofocus Yes
Motor type Stepper motor
Full time manual Yes
Focus method Unit
Distance scale No
DoF scale No
Weight 130 g (0.29 lb)
Diameter 68 mm (2.68)
Length 22 mm (0.87)
Sealing No
Colour Black
Filter thread 52 mm
Hood supplied No
Tripod collar No

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