 Oliver Anderson |
Is this a good quality lense for this purpose? I have a Canon 10D and want to purchase a good zoom lense. how do I know what quality this lense is: EF-S 17-85MM f4-5.6 IS USM Standard Zoom. I will be using at car shows and taking photos of Bikini Models. Good Choice Y/N?
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Jon Close |
Would be a good choice if you had a Digital Rebel or EOS 20D. While all EOS bodies can use EF lenses, those are the only 2 camera bodies that can also mount the EF-S lenses. The EF-S lenses extend back into the camera body and will interfere with the mirror if mounted (which they can't) to other EOS bodies. The EF 28-135 f/3.5-5.6 IS USM would be a good alternative for the bikini model use, but is not as wide angle for the car shows. For a little more than the EF-S 17-85 you could get the extremely well regarded EF 17-40 f/4L USM. A budget alternative would be the Sigma 18-125 f/3.5-5.6 DC.
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Oliver Anderson |
Hey thanks for the answer, I'm looking at this lense as well the Canon EF-Zoom lens 17MM-40MM f/4.0 L USM wide angle. and while i'm at it could you explain what the f/4.0 L USM mean?
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Jon Close |
f/4 = maximum aperture is f/4 at all focal lengths. As opposed to a f/3.5-5.6 which is f/3.5 at the shortest focal length, but only f/5.6 at the longest. L = "Luxury". In the Canon line it is reserved for professional grade lenses with more rugged build, weather-sealing, and exotic lens elements. USM is Ultra-Sonic Motor driven autofocus. In the 17-40 (and 28-135 IS USM) it is a ring-USM which fits round the lens elements and moves them directly without gearing. Very fast, virtually silent, and allows full time manual focus (FTM) without having to use the AF/MF switch. Conventional AF motors and Canon's cheaper micro-USM use reduction gears that must be disengaged from the motor before manual focusing.
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Oliver Anderson |
I appreciate all the info. Oliver
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