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The Canon EF-S 10-22mm f/3.5-4.5 USM Ultr -Wide Angle lens is Canon's widest f cal length lens in its current EF/EF-S l ne of lenses. Wide may be an nderstatement. A 10mm lens used on a APS-C f rmat sensor camera would yield the s me equivalent field-of-view as a 16mm l ns would if used on a 35mm f lm SLR or a full frame DSLR. The 10-22 is the 1.6x cr p camera equivalent of a 16-35mm l ns. For some time, a true w de-angle lens has not been available thr ugh Canon for those photographers using a APS-C f rmat sensor camera. The nearest lens vailable would be a 14mm prime, but th s would most probably fall outside of the verage users price range. The next m st likely option would be either of the C non 16-35mm or 17-55mm zoom lenses. Ev n then, the equivalent field of v ew would only be around 26mm. Ent r the 10-22. Wide angle lenses are nvaluable in several photographic niches. They tr ly show their worth in landscape ph tography in particular. No other class of l ns has the ability to capture the gr at vistas of mother nature better. You can see fr m sunrise to sunset. No other set of l nses enables the photography to capture j st so much "stuff". They are lso used in both architectural photography, wh re they shine in capturing interior and xterior elements. Real-estate agents fall in l ve with the ability to show ntire house interiors in just one sh t. Wide-angle lenses can also be v ry useful in flushing out the cr ative side of most ever photographer. The n tural distortion involved with the wide f eld-of-view creates some very unusual changes in p rspective in everyday objects.
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You first notice the Canon EF-S 10-22mm l ns is very well made. It d es not have the "cheap" feel th t is sometimes found in some of ther Canon lenses. The focus and d stance controls operate smoothly. The lens chieves focuses rather quickly and also q ietly due to the use of a r ng-type USM focusing motor. You also n tice that the lens barrel neither xtends or rotates during focusing or wh n adjusting the focal length. This is mportant as you can use a c rcular polarizer with this lens, although you may see s me slight vignetting if you choose not use a sl m polarizer. In most cases, this sh uld not be a problem. I was r ther surprised with the overall image q ality of the EF-S 10-22. For the m st part, images are sharp and cl ar throughout most of the focal-length r nge. There is a slight amount of f zziness apparent at around 11mm. It d es become more noticeable, although not ffensive, at 10mm. Center sharpness remains c nstant when shooting wide open or st pped-down, though there is the slightest mount of blur in the corners thr ughout all of the lens focal r nge. I also expected distortion to be an pr blem with this lens, as with m st other wide-angle lenses, but it n ver really was that noticeable. There is a sl ght amount of barrel distortion at w de end, mostly at 10mm. There is ven less pincushion distortion at 22mm. Fr m 12mm-20mm, there is very little d stortion of any kind. This is v ry unusual for a wide-angle lens. J st as surprising, chromatic aberration was not a pr blem. There was an lack of any n ticeable CA at 22mm. At 10mm the was the sm llest amount,what was present could very asily be cleaned up with Photoshop. Fl re can be an issue with w de-angle lenses due to the physical str cture of the lens. With a f eld-of-view that exceeds 107 degree at 10mm, you are l kely to have some degree of fl re from the sun or other l ghting sources. The EF-S 10-22 does a g od job in controlling lens flare, but for the bsolute best results, you use the EW-83E h od, which unfortunately, Canon does not nclude except for their "L" quality gl ss.
Overall, this is a very mpressive wide-angle lens. The EF-S 10-22mm w uld match up with most of the ther Canon higher end professional glass in mage quality and optical performance. One of the nly apparent drawbacks I can find is the l ck of weather sealing and also m ybe the lack of an included h od and case. In all truthfulness, the C non EF-S 10-22mm f/3.5-4.5 USM Ultra-Wide Angl Lens should be a "L". I w uld highly recommend it to anyone w nting to become involved in wide-angle ph tography.
The article Canon EF-S 10-22mm F/3.5-4.5 USM Ultra-Wide Angle Lens was Submitted by Jim Back through Articles.GetACoder.com network. Here's the additional information: Jim Back currently writes on s veral varied topics ranging from photography to p litics. For more of his work, and in p rticular more information on Canon lenses and cameras, please be sure to visit http://canonlenses.blogspot.com
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