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Old Dec 26, 2004, 11:13 AM   #1
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I'm looking for some opinions. I will be purchasing a Canon 20D body soon, and I am undecided between the Canon 17-85 IS kit lens, and the Tamron 17-35 f/2.8-4 Di. This might seem like a no-brainer to some, since the Canon is longer, has IS, and is, after all, a Canon. However, the Tamron is faster, less bulky, and got a really positive review from Mike Johnston @ Luminous Landscape:

http://luminous-landscape.com/columns/sm-nov-04.shtml

BTW, I already own a Canon 28-105 EF lens, so the Tamron would not leave me uncovered in the 35-85 range. What do you all think? Thanks.
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Old Dec 26, 2004, 1:10 PM   #2
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Here are some of my thoughts on this:

Is the canon kit lens a USM lens? if so it would focus much faster than the tamrons which use a standard focus motor.

Not really sure how useful IS is on a short lens anyway, I rarely shoot hand held so IS was never a selling point for me.

The high rez focus point on the EOS 20d only works with lensesof f2.8 or faster. That is why I ended up with tamrons 28-75 F2.8 lens (1/3 the cost of the canon equivalent, but the canon has a USM motor)

I own 2 tamron's now the 19-35 and the 28-75 and am quite happy with both. I am awaiting reviews and tests to come in on their new 200-500 if it fairs well it just might be my next zoom addition.
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Old Dec 27, 2004, 6:04 AM   #3
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Tamron or Sigma 17-35...
You might consider Canon 10-22... which is just a little bit higher in price but you can keep your 28-105...
17-85 is not an option...
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Old Dec 27, 2004, 7:36 AM   #4
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The Sigma 17-35 f/2.8-4 has the ultrasonic drive (fast and quietwith full-time manual AF overide):http://www.sigma-photo.com/html/pages/17_35_ex_dg.htm

... and so does its 12-24: http://www.sigma-photo.com/html/pages/12_24_ex.htm

Both are from their professional EXline!:idea:
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Old Dec 27, 2004, 9:44 AM   #5
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Yes, true the Sigmas also have the ultrasonic motors.

But none of the lenses are fullltime f2.8, sothe high presision focus point on the 20d is rarely called into use.If that is important to you. Other wise they are all good wide lenses.
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Old Dec 27, 2004, 7:39 PM   #6
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Thanks for your thoughts, but of course they lead to more questions:

1. Does anyone reading this have experience with the Tamron 17-35 2.8-4? I just can't ignore Mike Johnston's rave review of this lens.

2. Will its lack of USM really impact my ability to capture action shots (especially indoor sports, such as volleyball)?

3. How important is the "highprecision focus point" in the 20D? I must admit I'm not familiar with this feature.



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Old Dec 27, 2004, 9:57 PM   #7
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gordonj wrote:
3. How important is the "high precision focus point" in the 20D? I must admit I'm not familiar with this feature.[/quote]

IMO not very... lot of DOF on a WA. The Tamron is quite good and is actually OEMed and resold under the Minolta brand for their 7D!

For wide open long tele however with a very thin DOF, the f/2.8 "high precision focus point" is essential otherwise you could end up with back/front focus
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Old Dec 28, 2004, 12:47 PM   #8
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Thanks, NHL. I would still like an answer to my second question: Will the Tamron, without USM, be able to focus fast enough for the 5 fps firing rate of the 20D?

Many thanks to anyone who has an opinion on this.
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