วันพุธที่ 18 มกราคม พ.ศ. 2555

Canon EF-S 10-22mm f/3.5-4.5 USM SLR Lens

Product Description


Can Ef S 10 22mm F35 45 Usm Slr Lens , Zoom Q3hd With 1x Optical Zoom 24 Lcd Screen , S Y Hdr Td10 High Definiti 3d Handycam , C Tour Plus Camera , Deals S Y Hdr Cx700v High Definiti Handycam Camcorder, From the Manufacturer This exciting new zoom lens provides ultra wide-angle coverage to the EOS 20D and Digital Rebel shooter. Equivalent to a 16-35mm zoom, it offers excellent performance and optics designed from the ground-up for digital SLR use. Three Aspherical lens elements, plus a Super-UD element, assure image quality. Its ring-type USM means fast and silent AF along with full-time manual focus. It focuses as close as 9.5 inches.
Features
  • Excellent optical quality and true wide-angle coverage with select digital SLRs
  • Superior AF performance and speed, with full-time manual focus by simply turning ring
  • Close-focusing to 9.5 inches -- fill the frame with subjects as small as 3.6 x 5.4 inches
  • Relatively compact size and light weight for an ultra-wide zoom lens
  • Inner focusing system (no front element rotation); length doesn't change if zoomed
  • Circular aperture design -- natural highlights, even stopped down two stops
  • Electronic diaphragm -- manually-set apertures stay constant from f/4.5 thru f/22
  • EF-S lens mount -- exclusively for EOS 20D and Digital Rebel bodies



This review is from: Canon EF-S 10-22mm f/3.5-4.5 USM SLR Lens for EOS Digital SLRs (Camera)
I have had this lens for several months now and let me start out by saying WOW. I looked at the lens in the store along with the Sigma 12-24 and I was in total awe of what I saw though the view finder with the Canon 10-22. This is an ultra wide angle lens that is incredible. I went home and thought about where I would use this lens and determined that I would use it quite a bit. I went ahead and bought the lens and I continue to be more impressed with it every time I use it. I have used the lens for both close-up (which can give you some very interesting distortion shots)and wide angle shots with great success.

The 10-22mm is equivalent to 16-35mm field of view using a canon 20D which is not a full frame sensor. With a minimum focal distance of .24m (about 9.5 inches) you can get very close to objects and still get alot of focal width in the photo. There is incredible clarity in the lens. The photos I have taken are very clear with only a slight hint of softening at the corners at 10mm; everything else is sharp after that. There is a little barrel distortion at 10mm but everything else up to 22mm is nice. I have not gotten any light flare in my photos. The Ultrasonic motor is very quiet. The depth of field is outstanding. A slim UV filter helps prevent some slight vignetting at 10mm. With a maximum aperture that ranges from f/3.5 to f/4.5, the Canon EF-S 10-22mm f/3.5-4.5 USM Lens is a medium speed lens. I would recommend using a tripod if you are at all unsure about your ability to hold the camera still for action shots with this lens. The lens it's self is fairly light weight. If you are going to use filters the lens requires 77mm.

The lens can produce some interesting distortion shots if you are taking close-ups and are not perpendicular to the object. For close-up shots with out distortion it is best to be perpendicular to the object.

Inside the lens housing there are three aspherical lens elements and a Super UD element that produce clear vibrant shots. The lens it's self sturdily built and comfortable to handle.

UPDATE 7/30/2011: I still love this lens. It functions every bit as well as it did the day I got it.

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