Canon’s EF-S 10-22mm f/3.5-4.5 USM; An Ultra-Wide Zoom Digital APS-C Format Lens Page 2
Anyway, as I started to say, flare could be a problem, and the lens shade
may have helped. But what really did the trick was the internal baffling and
flare-blocking diaphragm. I wanted to see this for myself, so I went out a couple
of days sans shade and looked for damaging evidence. But could not find it.
Light transmission in pictures without the lens shade was practically on a par
with those taken with the shade (although I'd still recommend you spend
the bucks on a lens hood, if only to protect the lens). I even pointed the lens
at a setting sun. The most I got for my troubles was a tiny bit of flare, and
an almost inconsequential flare ghost. Not a haunting experience, I might add.
Finally, I wanted to check a couple of other things, one being lens (curvilinear) distortion. At 22mm, pincushion distortion is barely noticeable. At 10mm, barrel distortion is apparent, but not necessarily to the extent you might expect in practice. Aside from that, I wanted to see how sharp the lens is corner to corner. Some falloff is expected at these wide focal lengths when the center of the image is in focus. And by veiling some detail, vignetting contributed to a perceived lack of definition around the perimeter of the image--but again, not readily discernible with most subjects. By the way, owing to the short throw, moving from one end of the zoom range to the other was quick--and smooth.
Now, before you run out and buy this lens, you might want to read Peter Burian's coming report on several non-OEM lenses that roughly fall within the same 10-22mm zoom range. I myself can't wait. This Canon EF-S 10-22mm USM lens has proven itself to me time and again. I've already reserved space for it in my camera bag.
Focal Length And Maximum Aperture: 10-22mm; f/3.5-4.5
Lens Construction: 13 elements in 10 groups
Diagonal Angle Of View: 107Þ 30 ft - 63Þ 30 ft
Focus Adjustment: Inner focusing system, with focusing cam
Closest Focusing Distance: 0.79 ft
Zoom System: Ring USM
Filter Size: 77mm
Max. Diameter x Length, Weight: 3.3x3.5", 13.6 oz
Street Price: $799
For more information, contact Canon U.S.A., Inc., One Canon Plaza, Lake Success, NY 11042; (800) 652-2666, (516) 328-5000; www.canonusa.com.
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