Only 4mm longer than the 18-55mm (68 x 71.5mm) but a little heavier (320g vs 225g) the 10-17mm has a characteristic that people either love or hate - fish-eye!
Yes, fish-eye - the effect of bending straight lines into curves, most pronounced near the edges. There are exactly 2 perfectly straight lines, however, and they are the vertical and horizontal line passing through the center of the lens. However, at the maximum of 17mm, it makes a nearly rectangular image with only a small amount of curvature. There is only one truly "wow" lens (because that is what people say when they see a good shot with it) and that is the fisheye.
You can't use a filter for filtration or protection because the extreme wide angle which would severely vignette the image, even if there were threads.
The lens comes with a push-on front cap, bayonet rear cap, and a soft case.
Here are some examples which I hope show the usefulness of the lens.
10mm
Watch your feet and elbows!
17mm
10mm
11mm
Last edited by SpecialK; 02-04-2009 at 11:10 PM.