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DPChallenge Forums >> Hardware and Software >> Canon 28-105 F3.5 or Tamron 18-200mm?
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 02/21/2006 09:40:03 AM · #1
Which would you recommend of the two in relation to image quality?

thanks
 02/21/2006 09:48:28 AM · #2
Neither.
Get the Tamron SP 24-135 for $400.

the 18-200 has nice range, but at 200 it is 6.3 max aperture - dark, may cause AF issues on a rebel (or any canon for that matter). You WILL get distortions at both ends. this is very much consumer glass.

the 28-105 4-5.6 USM sucks. bad build, bad optics - just avoid it. ON //www.fredmiranda.com it rates a 5 on a 1-10 scale. the 18-200 is not even rated. The Tamron 24-135 is 9.3 - better than most L glass!

Message edited by author 2006-02-21 09:49:04.
 02/21/2006 10:18:58 AM · #3
Really? Thanks prof. I was thinking of the Canon 28-105F/3.5 not the F4, its on Fredmiranda and got a high score too (plus its cheaper, hehe)
 02/21/2006 10:20:38 AM · #4
The 28-105 is ok if you're not expecting much. It's sharpness leaves a little to be desired. The 24-135 is a nice lens too but it's a compromise as well. What are you looking for in a lens? Generall, for optimum optical quality the highest mag ratio is 3x (Tamron 28-75 for example). Above that and you're compromising image quality for range.
 02/21/2006 10:30:03 AM · #5
Prof Fate helped me decide on the Tamron SP 24-135 and then for longer reach I'll get the Sigma 100-300 f/4. Gonna take a bit to scrape the money together. But, it'll be worth it.
 02/21/2006 10:36:10 AM · #6
Originally posted by Ampao64:
Really? Thanks prof. I was thinking of the Canon 28-105F/3.5 not the F4, its on Fredmiranda and got a high score too (plus its cheaper, hehe)


I see...had to go in a few pages. 8.6, not too bad. 90% recomend it. Not too bad either, and at $229 i can see why you're interested.

did you look at the sample images here on DPC?
canon 28-105 3.5-5.6
tamron SP 24-135

the SP is tamron's Pro line of glass. Great stuff. Glass is forever, bodies come and go. Glass will make the pic better, everytime.
 02/21/2006 11:16:57 AM · #7
I would honestly say (and I've had both) the Tamron and Canon both have about the same image quality. Not super sharp (but sharp enough). I think the Canon is a little faster through the range (I can't remember exactly) and it's focusing system is better. The range and build quality of the Tamron are far and above better as you can get away with it as a walk around whereas 28mm is just not wide enough for most things.

And again, honestly, I got rid of both for the speed and image quality of the Tamron 28-75. When I called Tamron about the 24-135 complaining about how it's not as sharp as the 28-75 they told me it's because the 24-135 is designed for film which doesn't require the light to be incident at 90 degrees where digital does so you lose some sharpness that way. I had 2 24-135's before I sold them both because I just really wanted that range and didn't want to believe it wasn't as sharp as it was supposed to be. Maybe I had 2 meh copies, who knows. I do know that the color and sharpness of the 28-75 are awesome and coupling that with a 70-? telephoto is a great combination.
 02/21/2006 06:13:06 PM · #8
Originally posted by Ampao64:
Which would you recommend of the two in relation to image quality?

thanks

Neither, both of these lenses tend to compromise optics for range.
Most that get a 18-200mm zooms get it as their only lens or a one lens for travel. Looking at some reviews on PopPhoto. Both the Tamron and Sigma versions are good till past 100mm. These also go from wide to telephoto and hence have a lot of distortion with soft corners at the wide end especially open. (see slrgear.com)

The Canon is not wide enough and need to be stopped down to atleast f5.6 to be really sharp. Pus 28mm is not wide at all with 1.6xcrop and it's not as long as the Tamron. (see photozone.de)

Given the two choices, I'd pick Tamron if forced into a decision. But if you are concerned more about optics over convinience, then I'd recommend considering perhaps two lenses to cover the same/similar range.

Message edited by author 2006-02-21 18:13:38.
 02/21/2006 06:16:30 PM · #9
Originally posted by Ampao64:
Which would you recommend of the two in relation to image quality?

thanks


Are you asking about the OP's lens choices? The 28-105 f/3.5-4.5 is better optically than the Tamron 18-200 (at least according to FM reviews).

Message edited by author 2006-02-21 18:17:44.
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