This Canon EF 40mm F2.8 STM prime lens is compact pancake-like lens that will suite both full frame DSLRs like the Canon EOS 5D Mark III and APS-C DSLRs like the EOS 650D / Rebel T4i announced today. Sold $199 (US)/ €279 (EU), it is affordable and will sell like crazy. It offers a pretty decent aperture of f/2.8and only weights 130g. That is nothing. Its STM autofocus drive offers smooth, fast, quiet and precise focusing in video mode. It will be available at the end of June 2012.
Today, Canon unveiled an other STM lens, the EF-S 18-135mm f/3.5-5.6 IS STM.
Canon EF 40mm STM main technical specs
- Focal length : 40mm
- Max. aperture : f/2.8
- EF mount (supported by Full Frame and APS-C DSLR)
- Number of diaphragm blades : 7, circular
- Closest focusing distance : 30cm
- Max. magnification : 0.18x
- AF drive : STM
- Filter diameter : 52mm
- Lens diameter / length : 68.2 x 22.8mm
- Weight : 130g