I have been looking at the canon 17 40mm l lens for a while but where told by people owning both the 17 40 and the 10 22 that the 10 22 where a superior lens.
Canon 10 22 su full frame.
The construction of this lens is excellent with no plastic feel to it.
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From about 16mm the entire sensor would be covered on a full frame camera and the back element of the lens would clear to a ef level from about 12mm.
Modify the canon 10 22mm ef s to ef for full frame and a new discovery.
I decided to try it myself since i happened to have access to both not my lens.
Tommyinca sep 5 2009.
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Ef s is canon s moniker for small image circle.
7d is not a full frame body.
It has the same field of view on a dslr with a 1 6x sensor as a 16 35 zoom has on a full frame 35mm camera.
Canon s ef s lens won t mechanically fit on an ef mount only ff body like 5d.
It has a aps c 1 6x sensor like the 20d and accept ef s lens like a 20d would.
With framing equivalent to a 16 35mm zoom on a full frame body the canon ef s 10 22mm f 3 5 4 5 usm lens provides ef s compatible camera body owners with the ultra wide angle focal lengths so often missed on this small sensor format camera.
The canon ef s 10 22 3 5 4 5 usm is canon s widest lens for digital slrs.