The Canon EF 40mm f/2.8 STM ($199.99 direct) lens is one of the smallest you'll find for Canon cameras . Its pancake design barely juts out from a camera when mounted. It can be used on full-frame and APS-C D-SLRs, and provides smooth autofocus for video recording when paired with the EOS Rebel T4i...

Extremely compact; Very sharp; Minimal distortion; Inexpensive; STM focus motor

Focus-by-wire design; Modest f/2.8 aperture

The diminutive Canon EF 40mm f/2.8 STM Pancake Lens immediately inspires the high-pitched talking-to-a-baby voice from its first-time viewers, with short drawn-out words and phrases such as "awwwwe" and "it's sooooo cuuute" being especially common.

Canon has launched two new lenses with the EOS 650DRebel T4 DSLR - the EF 40mm f/2.8 STM and the EF-S 18-135mm f/3.5-5.6 IS STM, priced at £229.99 (about $355) and £479.99 (about $740), respectively.

Handling and features Performance Verdict Specification The Canon EF 40mm f/2.8 STM is a slim, compact pancake type lens, which is compatible with Canon EF and EF-S camera bodies and costs around ￡230.

Excellent sharpness; Low distortion; Compact and lightweight; Fast focusing

No full time manual focus override; Strong vignetting; More than double the price of the 50mm f/1.8 (although performance and build probably justify this

The Canon EF 40mm f/2.8 STM represents a bit of a debatable concept on a DSLR - at least when compared to the much smaller mirrorless camera system. Honestly speaking there is also not really much of a size and weight advantage when thinking of its closest cousin - the Canon EF 50mm f/1.8 - which is...

This lens is a "always on the camera" lens - it's wide enough for taking pics of landscapes, groups of people and you can go rather close with it too - it's my new Allrounder --- on my 5DII I can work undercover because it is so so unspectacular - which works for me!

very compact - good usage for street photography - f 2.8 is fully usable but best results with f5.6; autofocus is quick,exact and nearly quiet

Build is far away from L but much better than the 1.8/50 II; so it's good enough for normal usage

Canon has launched two new lenses with the EOS 650D / Rebel T4 i DSLR - the EF 40mm f/2.8 STM and the EF-S 18-135mm f/3.5-5.6 IS STM, priced at ￡229.99 (about $355) and ￡479.99 (about $740), respectively.

Canon's new standard fixed 40mm lens is so slim and light (just under 3cm protruding from camera body to lens cap edge and weighing 130g) it can slip into a gear bag or pocket with little bother.

Versatile; small and light; Sharp images; Silent autofocus in video mode on 650D and 5D Mark III

Auto/manual focus switch a little fiddly; Quiet autofocus feature only with the above models

I can't believe how long it took me to purchase this lens. This review is for full-frame use. I've been rolling my eyes at it ever since it first came out. How can this lens be any good Recently reading various technical reviews raised my eyebrows and quickly changed my opinion of this lens.

I love this lens. I prefer to use prime lenses over zoom lenses and I bought this lens to replace the "nifty fifty" that was recommended to me when I bought the camera body. This lens is a much higher quality and takes better images. The auto focus mechanism is also a lot more responsive.

High quality construction; compact size; amazing price

Nothing