Find The Latest Usm Telephoto Lens Information You"re Looking For Below
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 52mm Flower Lens Hood for Canon EF 50mm f 18 USM  US $9.90
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 Canon 52mm Drop in PL C for EF 300 F28L IS USMGenuine US $214.99
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 Canon 17 85mm 40 56 EF S IS USM EOS Rebel Zoom Lens US $369.95
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 Canon EF 24 105 mm IS USM Lens Canon EOS SLR Cameras US $899.00
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 BRAND NEW Canon EF 28 135mm f 35 56 IS USM lens US $300.00
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 Canon EF 24 105mm f 4L IS USM Lens US $816.00
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Scroll Down Now to Find Even More Usm Telephoto Lens Info
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52mm Flower Lens Hood for Canon EF 50mm f 18 USM US $9.90
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Canon 52mm Drop in PL C for EF 300 F28L IS USMGenuine US $214.99
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Canon 17 85mm 40 56 EF S IS USM EOS Rebel Zoom Lens US $369.95
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Canon EF 24 105 mm IS USM Lens Canon EOS SLR Cameras US $899.00
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BRAND NEW Canon EF 28 135mm f 35 56 IS USM lens US $300.00
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Canon EF 24 105mm f 4L IS USM Lens US $816.00
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 Canon EF 180 f35L Macro USM AutoFocus Telephoto Lens US $1,389.00
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 Canon EF 75 300mm f 4 56 III Lens US $123.09
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 CANON EF 28 135MM f 35 56 IS USM LENS WIT HOOD NICE US $207.50
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 CANON EF 28 80mm 35 56 III ULTRASONIC ZOOM LENS US $41.00
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 Canon EF 70 200mm 28 IS USM 2X Lens Kit 1DS 1D 7D US $2,249.99
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 Canon EF 70 200mm f 28 L Mint Condition US $1,025.00
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 Close UP lens set for Canon Sx10 is US $17.99
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 Canon 70 200mm f 28L IS USM EF Lens 70 200 28 L NEW US $1,987.00
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 Canon EF 28 135mm f 35 56 IS USM Lens US $200.00
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 Canon EF 28 90mm USM Ultrasonic Lens MintUV XT XTi XS US $109.00
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 Canon EF 70 200mm f 28L IS USM Telephoto Lens JAPAN US $1,350.00
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 2X Telephoto lens for Canon Rebel XTi US $29.90
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 Wide Angle Lens for Canon Digital Rebel XTi US $64.99
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 NEW CANON EF 70 200mm f 40L F4L F4 L USM ZOOM LENS US $689.95
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 58mm Flower Petal Lens Hood for Canon 50mm f 14 USM US $4.49
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 TELE Wide Angle LENS TO SONY PD170 PD150 VX2100 VX2000 US $44.99
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 Canon 100 400mm f 45 56L IS USM Telephoto zoom lens US $1,625.00
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 Canon EF 75 300mm DSLR Lens NEW US $86.00
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 Canon EF 100mm f 28 USM Lens US $450.23
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 Canon EF S 17 85mm IS USM Lens for Digital 7D 50D Xsi US $424.95
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 New 0 40 WideTele 35x Set for Canon XSI XS XTI 450D US $85.50
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 Canon EF 70 200mm f 40L USM Lens Canon ZOOM 70 200 f4L US $500.00
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 Canon EF 28 300mm f 35 56L IS USM Lens US $1,799.00
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 Canon Zoom Telephoto EF 100 400mm f 45 56L IS Imag US $1,251.00
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 Canon EF 70 300mm IS USM Lens Rebel XS XSi T2i T1i XTi US $519.95
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 Canon 75 300mm f 4 56 III EF USM Lens US $125.99
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 Canon EF S 17 85 17 85mm F4 56 IS USM SLR Lens US $390.00
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 Canon EF 28 135 28 135mm F35 56 IS USM Lens US $425.00
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 TELE WIDE ANGLE LENS FOR CANON FD 28 50mm f 35 SSC US $39.99
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 Wide Angle Lens for Canon Digital Rebel XT US $64.99
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 2X Telephoto lens for CANON EOS REBEL Ti k2 T2 G GII US $29.99
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 Canon EF 70 300mm f 45 56 DO IS USM Lens US $571.00
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 Canon EF 75 300mm f 40 56 III USM Lens BRAND NEW US $219.85
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 Canon EF 70 200 f 4L IS USM US $899.00
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 Canon Zoom Wide Angle Telephoto EF 28 135mm f 35 5 US $215.00
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 Canon EF 70 300mm f 4 56 IS USM Zoom Lens BRAND NEW US $499.92
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 New Wide 040x Telephoto 35x For Canon Rebel XSi 450D US $85.50
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 CANON EF 70 200mm f28L USM LENS EOS REBEL 50D 5D NEW US $1,277.75
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 WideTelephoto 2x Lens Set Canon EOS 450D Rebel XSi US $47.69
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 Canon EFS 17 85mm IS USM Lens with hood filters 17 85 US $329.95
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 Canon EF 75 300mm f 45 56 IS USM US $255.00
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 Canon EF 75 300mm f 4 56 III USM Lens US $130.00
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 NEW CANON EF 75 300mm f 4 56 III ZOOM LENS 75 300 mm US $172.95
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 Canon EF 28 105mm 35 45 USM zoom lens UV filter US $99.88
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 Canon EF 70 200mm 28 L USM Lens Kit 20D 30D 40D 50D 7D US $1,379.99
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 New Canon EF 70 200mm f 28L USM Lens UV T2i 5D II 7D US $1,325.00
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 Canon EF 70 200mm 28 L USM Lens Kit 1D T1I T2I 7D 5DII US $1,349.99
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 Canon EF 70 200mm f 28L IS USM w shade case caps US $1,300.00
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 Canon EF 70 200mm 28 L USM 2X Lens Kit 1D T1I T2I US $1,349.99
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 Canon EF 70 200mm 28 USM 2X Lens Kit 50D 40D 7D 5D US $1,399.99
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 Canon EF 28 135mm 35 56 IS USM zoom lens NO RESERVE US $202.50
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is USM important for a lens with IS?
I got my 450d with the kit lens recently. now I'm looking foward for the second lens which probably mid telephoto lens. currently lookig at EFS 55mm-250mm IS and 70mm-300mm IS USM. just wanna know is it worth it to pay an extra bucks for the USM
USM is Canon's Ultrasonic Motor, which allows for fast and quiet focusing, as well as full-time manual focusing (which lets you manually focus at any time, without having to set the switch to MF).
With zoom lenses, you often get what you pay for. The EF-S 55mm-250 f/4-5.6 is a budget lens complete with plastic Lens Mount, no USM and only costs around US$255. It doesn't produce the sharpest image quality (that's why it's cheap).
The EF 70-300mm f/4-5.6 IS USM is a better lens overall...a little better optically and in build, has USM, a metal lens mount (that's why it costs more).
However, there are better choices. For example, the EF 70-200mm f/4L USM (only slightly more than the EF 70-300mm) or the same lens with IS (a far better lens, but it will set you back at least $500 more than the EF 70-300mm).
Also, have a look at Canon's prime lenses (one focal length). They are excellent optically and faster (constant wide aperture, e.g f/1.8, f/1.4). Making them perfect for portraits and low light shooting.
Just remember, you get what you pay for...