Canon EF 40mm f/2.8 STM

Canon EF 40mm f/2

Lens Summary

Brand: Canon

Also Known As: Canon 40mm f/2.8

Lens Type: Prime Lens

Format: Full Frame / FX

Focus: Autofocus

Lens Mount: Canon EF

Release Date: 2012-06-08

MSRP Price: $149

Made in: Japan

Infrared Rating: Good

Production Status: In Production

Lens Description: 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 color balance. The EF 40mm f/2.8 STM\'s unobtrusive design helps the photographer avoid overwhelming their subjects with a large lens and to remain discreet in sensitive shooting situations with no compromise in performance. Its diminutive design is complemented by features such as a newly developed stepping motor for smooth and quiet continuous AF while capturing video with the Canon EOS Rebel T4i DSLR, a circular aperture (7 blades) for beautiful soft-focus backgrounds, and a short minimum focusing distance of only 0.98 ft./0.30 m.


Canon EF 40mm f/2.8 STM Specifications

Lens Specifications
* Supplied accessories may differ depending on country or area 
Lens TypePrime Lens
Focal Length40mm
Mount TypeCanon EF
FormatFull Frame / FX
Compatible Format(s)35mm Film / Full-Frame Digital Sensor Canon (APS-C)
Compatible with TeleconvertersNo
Image Stabilizer (Image Stabilization)No
Aperture Information
Aperture RingNo
Maximim Aperturef/2.8
Minimum Aperturef/22
Maximum Angle of View (Full frame or larger format)56.8°
Optical Information
Lens Elements6
Lens Groups4
Diaphragm Blades7
Focus Information
FocusAutofocus
Built-in Focus MotorYes
Stepper Motor (STM)Yes
Internal FocusingYes
Minimum Focus Distance0.30m
Distance InformationYes
Filter Information
Filter Size52mm
Accepts Filter TypeScrew-on
Physical Characteristics
Weather / Dust SealingNo
Mount MaterialMetal
Dimensions68 x 27 mm
Weight130g
Other Information
Available in ColorsBlack
Supplied Accessories01/01/1900

Lens Construction

Canon EF 40mm f/2.8 STM

MTF Chart

Canon EF 40mm f/2.8 STM. chart

About Nasim Mansurov

Nasim Mansurov is the author and founder of Photography Life, based out of Denver, Colorado. He is recognized as one of the leading educators in the photography industry, conducting workshops, producing educational videos and frequently writing content for Photography Life. You can follow him on Instagram and Facebook. Read more about Nasim here.

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