 Lena M. Nilsson |
canon vs. tamron I want to buy a wide angle lens for my Canon Rebel, and would like some help choosing between a Canon 17-40 or the Tamron 17-35, what's the difference (beside cost)?
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Jon Close |
The Tamron is a terrific lens and would be money well spent. But it is obviously shorter zoom range. The Canon is f/4 throughout the zoom range where the Tamron is f/2.8-4. While the Tamron is wider aperture through most of the range (a good thing), it is generally easier and less expensive to make a zoom with varying maximum aperture than one with constant maximum aperture. The Canon uses a ring-USM (Ultra-Sonic Motor) for autofocus that is very fast, silent, the focus ring does not move when autofocusing and allows full-time manual focus w/o using the AF/MF switch. The Canon L also has dust/weather seals at the focus ring, zoom ring, and switches.
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Mike Rubin |
Tamron has a 17-50 with a constant f/2.8. All the reviews I have read say it is an excellent lens and equal in optical quality to the Canon. It retails for $449. But can be found for less (B&H had a monthly code for specials and offered it for $419.) The Canon is over twice as much,but has IS if that is important to you. In January I will be trying one out. If cost is an issue,check it out.
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Mike Rubin |
Check out this site. http://photography-on-the.net/forum/ There is a section "Market Watch" that people list specials that companies and stores are having. You need to register with the forum to view this section.
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Jon Close |
Ah, good catch. DIGITAL Rebel can use EF-S, DC, Di II, DX lenses that offer greater zoom range, greater maximum aperture than those lenses designed for 35mm film like the EF 17-40 f/4L USM and Tamron 17-35 f/2.8-4. The Tamron 17-50 f/2.8 XR Di II and Sigma 18-50 f/2.8 EX DC have both wider constant maximum aperture and greater zoom range for less than the EF 17-40.
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Lena M. Nilsson |
Thanks for your help, all the options make me confused, and it seems everyone is more focused on digital, while I really want the wide angle more for my film camera. Would the Tamron 17-50 f/2.8 work on my film camera too?
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Jon Close |
The Tamron 17-50 f/2.8 XR Di II will fit and work on a film camera, but is likely to vignette badly at the wider zoom settings.
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