Canon EF 40mm f/2.8 STM Lens

BH #CA4028 • MFR #6310B002
Canon EF 40mm f/2.8 STM Lens
Key Features
  • EF-Mount Lens/Full-Frame Format
  • Aperture Range: f/2.8 to f/22
  • One Aspherical Element
  • Super Spectra Coating
Show More
Characterized by its slim, pancake design, the EF 40mm f/2.8 STM from Canon is a sleek and versatile short-normal prime that is ideal for everyday, walk-around shooting. Its f/2.8 maximum aperture helps to realize its slim stature, and also suits working in difficult lighting conditions and offers control over depth of field for working with selective focus techniques. One aspherical element has been incorporated in the optical design, and helps to reduce distortion and spherical aberrations for high sharpness and clarity. A Super Spectra coating has also been applied, which helps to minimize lens flare and ghosting for improved contrast and color fidelity in strong lighting conditions. Additionally, benefitting both photo and video applications, an STM stepping AF motor is used to realize quick, accurate, and near-silent autofocus performance.
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Canon EF 40mm f/2.8 STM Overview

Characterized by its slim, pancake design, the EF 40mm f/2.8 STM from Canon is a sleek and versatile short-normal prime that is ideal for everyday, walk-around shooting. Its f/2.8 maximum aperture helps to realize its slim stature, and also suits working in difficult lighting conditions and offers control over depth of field for working with selective focus techniques. One aspherical element has been incorporated in the optical design, and helps to reduce distortion and spherical aberrations for high sharpness and clarity. A Super Spectra coating has also been applied, which helps to minimize lens flare and ghosting for improved contrast and color fidelity in strong lighting conditions. Additionally, benefitting both photo and video applications, an STM stepping AF motor is used to realize quick, accurate, and near-silent autofocus performance.

Short normal-length prime is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides a 64mm equivalent focal length.
Modestly bright f/2.8 maximum aperture benefits working in low-light, affords control over depth of field, and helps to keep the overall physical design compact and lightweight.
Pancake form factor measures less than 1" thick for an ultra-portable, versatile design.
One aspherical element limits distortion and spherical aberration in order to realize greater sharpness and accurate rendering.
Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.
An STM stepping AF motor realizes smooth, near-silent autofocus that is complemented by a rear focus system, advanced AF algorithms, and a high-speed CPU for fast AF performance.
Rounded seven-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.
UPC: 013803147742

Canon EF 40mm f/2.8 STM Specs

Focal Length40mm
Maximum Aperturef/2.8
Minimum Aperturef/22
Lens MountCanon EF
Format CompatibilityFull-Frame
Angle of View57°
Minimum Focus Distance11.81" / 30 cm
Maximum Magnification0.18x
Optical Design6 Elements in 4 Groups
Diaphragm Blades7, Rounded
Focus TypeAutofocus
Image StabilizationNone
Filter Size52 mm (Front)
Dimensions (ø x L)2.69 x 0.9" / 68.2 x 22.8 mm
Weight4.59 oz / 130 g
Packaging Info
Package Weight0.51 lb
Box Dimensions (LxWxH)4.7 x 4.45 x 4.35"
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will this work on the SL2 ?

will this work on the SL2 ?
Asked by: carl
Yes it will
Answered by: vilson
Date published: 2021-01-12

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Yes, this lens will work well with the C100 mk2.
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Will this lense work on a crop sensor?

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Yes this lens can work on a crop sensor camera, with a crop factor of 1.6X applied to its focal length.
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Date published: 2019-11-11

Has anyone used it with the adapter on m mount ...

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Yes, it works fine.
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Will this work on EOS 620?

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Yes, Canon EF 40mm f/2.8 STM Lens will work on the Canon EOS 620, except for manual focus overdrive.
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Will this work on EOS RP ?

Will this work on EOS RP ?
Asked by: Anthony
Yes, with qualifications. The EOS RP is a new mirrorless camera and must use a "RF" mount lens. But canon has an adapter to allow the use of all EF lenses on the EOS RP. Check the list of items included with the camera. Sometimes the adapter is include with the camera as a sales incentive.
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I have the EOS Rebel SL1. Is this lens good for ...

I have the EOS Rebel SL1. Is this lens good for indoor sports? Thanks
Asked by: Anonymous
I think for indoor sports you are better with a zoom lens. The aperture is good for lower lighting, but finding the right framing with any prime is tough when you aren’t free to move around. Since you are shooting on a crop body I would recommend the 18-135 EFS. A little more money, but a big step up from your 18-55 kit lens.
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question

Anyone owns a 35mm lens and this one? How it compares in terms of focus speed?
Asked by: Guillermo R.
I have the 40 and a 35mm lens. The 40 is pretty fast. Its the companion lens to my really slow 85. I have found it to be extremely reliable and a great addition to my camera bag with very little space taken up. I dont think its a great portrait lens but it is a nice utility lens.
Answered by: Robert S.
Date published: 2018-08-28
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