E-Answer.Net

The measurement of a lens in mm is a measurement. The angle of view of a wide angle lens has to do with the format fo the sensor or film.



The lens you need for what you want to do would be the Canon 10-22 mm wide angle zoom.



"igital" lenses just mean that they are designed to cover the smaller sensor found on most DSLR's The lenses them selves capture analog light. Canon "digital" lenses are called EF-S, Nikon's DX.

If you want 19mm, you need to put a 12mm on your DSLR.

Just to add to Ace's answer, which is excellent, don't think that you must buy a "digital" lens for your camera. As long as it is a current EF or EF-S Canon lens, you can use a so-called "full format" or "film" lens, also. You can't put a digital lens on a full format or film camera, but you can go the other way. For this reason and looking towards possible future purchases, I am more inclined to buy "non-digital" lenses from now on.



For Canon, this means an EF mount will be suited for either film/full format or digital cropped sensors, but EF-S mounts will only be suited for digital.



The EF-S lenses tend to be a bit less costly, though.



Fhotoace chose a great lens for you. It is not an "L" lens, but I understand that Canon will not place an "L" on anything less that a full format lens, no matter how good it is.



http://www.bhphotovideo.com/c/product/35...