REVIEW: EF-M 22mm f/2 lens on my aging EOS-M (PICS)

1. JMarco Nero wrote:

leoskats wrote:

So guys these EF-M 22mm has a field of view equivalent to a 35mm Full frame camera? Is it a new technology for not losing image with a crop sensor?

You know, I once complained about this here since the EF-M lenses can't be fitted to ANY other camera. So why doesn't Canon just state the "equivalent" field of view on the box and the lens? The answer is probably twofold: (1) Canon might release a FF camera someday that still uses the relatively EF-M mount... and if that's the case, (2) Canon might be trying to cover their bases by doing what all the other manufacturers have been doing alongside them for years: Maintaining a universal standard with lenses. (the latter option is most likely the reason).
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Full Frame Equivalence.
Camera manufacturers equate their lenses to a Full Frame (35mm) equivalent. A Full Frame sensor is the same size as a 35mm frame of photographic film. This has become the "standard" since Digital Cameras made their way onto the scene. Which means every lens is rated as to how only how it will perform on a Full Frame sensor rather than how it will perform on any given mount. The image circle and sensor varies between one model of camera to another. There's more than one size for APS-C as well. Nikon, Pentax and Sony use a different APS-C size than Canon's slightly smaller APS-C sensor.
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Hence the 22mm lens will equate to about 35.42mm on a Full Frame sensor camera (if you calculate that a Canon APS-C sensor has a 1.61x crop/magnification element involved). Unfortunately, you can't stick it on any other camera other than the EOS-M series at the moment unless you can come up with an adapter. If Canon does indeed create a Full Frame sensor EOS Mirrorless camera, there's a chance it might enable EF-M lenses to be mounted - and that means the EF-M lenses like the 22mm will act like a proper 22mm lens.
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Of course, we can put a 100mm lens on a FF body or an APS-C body... both cameras could be DSLRs. But the resulting pictures would be quite different to one another, even though the same lens was used. On the full frame that same lens would offer 100mm. But on the APS-C camera it would be closer to 160mm. There's even an argument that you should multiply the aperture of the lens by the same to determine a different aperture ...but there's people who will disagree with this for several good reasons.
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My thoughts...
Personally, I think that Canon should mark all their lenses for the actual field of view they offer on different bodies and sensors. Still, there are people who don't understand how wide they need their lens to be for any given purpose. I asked a girl whom I know recently if the sensor on her Canon DSLR "was Full Frame or APS-C ?" the other day ...and she looked at me in a way that showed she had no idea that there were differences in sensor size and that she just thought any DSLR was the same as another. I quickly deduced she was using an APS-C camera. I think Canon and the other camera retailers are counting on this confusion to sell "wide lenses" to people who want wide lenses etc.
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Focal Reducers...
You can use something called a 'Focal Reducer' lens to change some of the aspect ratio of your lens to project more of the edges of the lens onto the sensor.... In theory this ought to give you a Full Frame projection from your lens onto your sensor... but these things are going to create problems for your camera in other ways (EXIF data may be altered, optical quality will be affected, imperfections towards the edge of the optics may present themselves and there will be an increase in size and weight to your camera due to the addition of this accessory.

Thank you Marco for your reply. I really appreciate it.