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Photography Question 
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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12/22/2006 9:10:13 PM

 
Jon Close
BetterPhoto Member Since: 5/18/2000
  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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12/23/2006 4:48:55 AM

 
Mike Rubin
BetterPhoto Member Since: 10/15/2004
  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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12/23/2006 5:21:54 AM

 
Mike Rubin
BetterPhoto Member Since: 10/15/2004
  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.
You may also find it to be a great forum to join since it is all Canon users. It's a great community as is BP


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12/23/2006 5:28:55 AM

 
Jon Close
BetterPhoto Member Since: 5/18/2000
  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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12/23/2006 8:17:50 AM

 
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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12/23/2006 11:11:24 PM

 
Jon Close
BetterPhoto Member Since: 5/18/2000
  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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12/24/2006 4:13:22 AM

 
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