Canon EF-M 22mm f/2 STM lens review at SLR Gear: "Given the few options available (as of February 2013) for Canon EOS-M users, having this prime lens as an option is a no-brainer."

'Few options'? Yeah right, when it comes to mirrorless cameras the options given by Canon are even fewer, so far their only offering is the EOS-M 'slug-o-matic' camera:

"The Canon EF-M 22mm ƒ/2 STM provided surprisingly sharp results. When used wide open at ƒ/2, there is some corner softness to speak of, but the majority of the frame is very sharp. Stopping down to just ƒ/2.8 provides very sharp images - for practical purposes, we would say it's tack-sharp from corner to corner. According to the raw numbers you'll have to stop down to ƒ/4 to see the sharpest results, but to the naked eye I doubt you would see the difference. The lens is sharp all the way to ƒ/8, where diffraction limiting begins to set in, but there isn't a significant impact on sharpness until ƒ/11, and even then it's just a slightly overall decrease. Images start to lose their sharpness at ƒ/16, and become moderately soft at ƒ/22."

 

 

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