>Since the 10-24 has a very narrow focal range as compared to >my 16-85, will a picture taken at 16mm from each look any >different as far as distortion, perspective, etc. (excluding >lens qualities), or does 16mm always look like 16mm?
Leaving aside (as you requested) that each lens' optical distortion characteristics will differ slightly, it is true that perspective will be identical for any lens when used at the same focal length. Bear in mind, though, that the widest focal length on the 16-85mm is probably a little higher (numerically) than 16mm - this is normal at the extremes of the range for most zoom lenses.
>Does taking pictures at short distances at 10mm give a slight >fish-eye effect?
Most super-wide lenses produce some barrel distortion at their wider focal lengths. This could be viewed as a very mild form of the "fisheye effect", but a true fisheye will give a far more exaggerated result. > >Thanks > >Oops, that was two questions. >