**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links.
Canon EF 40mm f/2.8 STM Lens Review
The Canon EF 40mm f/2.8 STM is a unique lens from Canon. It is a so-called “pancake” lens due to it’s very short length. This lens is designed for full frame Canon DSLR cameras, but can also be used on APS-C bodies. When used on an APS-C body the lens shows an equivalent 64mm lens field of view on a full frame body.
I personally own and love this lens, especially on my Canon EOS 6D. The 40mm focal length is a near perfect match for my preferred photographic vision and style. When mounted on my 6D the lens is hardly even noticeable, and makes the camera very small and unobtrusive.
- Canon EF 40mm f/2.8 STM - $199.99
*Pricing from Manufacturer's website - Current selling price may be different.
Check current pricing from these affiliates
Image quality from this lens is excellent. Because it is not an extremely wide or telephoto lens, and a skimpier deisgn there is not a lot of glass to get in the way of great images. The f/2.8 aperture also helps with depth of field control as well.
The lens does show a little bit of vignetting, but nothing extreme and that can be easily corrected in post. Processing.
the lens exhibits a little bit of barrel distortion, but he lens profile in Adobe Lightroom deals with this very well.
Again, this is a simple design and as a result the lens does have a little bit of chromatic aberration, however, like the disrtortion and vignetting characteristics, CA is easily fixed in post processing.
I have not noticed any severe lens flare issues, even when shooting directly into the sun. The lens does not include a lens hood, and the optional hood is a very odd design that makes using filters difficult.
Build quality is decent. The lens has a metal mount while the rest of the lens body is made from good quality plastics.
What I Like
- Size and weight
- Image quality
- autofocus performance
What I Don't Like
- Does not include a lens hood
- the lens hood is an odd design that makes filter use difficult
- no image stabilization
- no focus distance scale or hyperfocal distance markings
The Bottom Line
I LOVE this lens! It is a great focal length, and a very small lens to keep in your bag. The f/2.8 aperture is great for low light and shallow depth of field operations.
Click image to view larger - use your browser's "Back" button to return to this page.
30s f/5 ISO 100 Canon EF 40mm f/2.8 STM
1/5s f/11 ISO 100 Canon EF 40mm f/2.8 STM
.3s f/14 ISO 100 Canon EF 40mm f/2.8 STM
Overall User Rating
4.68 out of 5
based on 1743 user reviews online.
: 74% (1287.2)
: 22% (382.85)
: 3% (53.17)
: 1% (10.39)
: 1% (9.39)
|Focal Length||40 mm|
|Minimum Focus distance||11.81 inches|
|Number of Elements||6|
|Number of Groups||4|
|Aperture Blade Design||Rounded|
|Number of Aperture Blades||7|
|Filter Size||52 mm|
|Lens Mount Construction||Metal|