Canon EF 40mm f/2.8 STM


Minimum advertised price, please contact us for inquiries.

An ultra-slim and lightweight design.

  • STM lens
  • Focal length range 40 mm
  • Maximum aperture f/2.8
  • Filter size 52 mm diameter


  • SKU: CA6310B002
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A unique and indispensable addition to Canon's series of EF lenses, the new EF 40mm f/2.8 STM offers an ultra-slim and lightweight design. Incredibly compact in size, the EF 40mm f/2.8 STM delivers high image quality from the center to the periphery thanks to its advanced lens configuration including an aspherical element, a bright 2.8 aperture, and optimized coatings that minimize ghosting and flare while providing exceptional colour balance. A circular aperture (7 blades) for beautiful soft-focus backgrounds, and a short minimum focusing distance of only 0.98 ft./0.30 m.

Autofocus Yes
Lens mount Canon EF
Maximum aperture F2.8
Lens type Prime lens
Max Format size 35mm FF
Focal length 40 mm
Image stabilisation No
Minimum aperture F22.0
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″)
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
Filter thread 52 mm
Hood supplied No
Colour Black
Maximum magnification 0.18×
Tripod collar No