Sigma 17-70 or tamron 17-50 2.8

Can someone please let me know which of these are better. I know the tamron is noisy but it has the fie apperture. Tamron is also newer. Thanks for all the help. I am using a 400D.

Better for what purpose? What are your priorities?

This has been discussed many times, it comes down to own preference. I like having the extra reach, but would rather have a fixed aperture as well. Do note that the Tamron is way sharper at f/2.8 at 17mm than the Sigma. But if you primarily shoot landscapes (what do you shoot anyways?) you can't go wrong with either.

Woops, double post..

Here's a thread on the same issue

i like shooting a mixture of things. Not to keen on landscapes though. Am i right in saying that the sigma is macro and the tamron isnt. . I have a 28-135 is canon so dont really need the reach. How about the 17-50 2.8 sigma as that is macro aswell.

Both the Sigma's don't really have a macro function, it's 1:2-1:3. You can focus closer than the Tamron. The macro function is nice to have, but I wouldn't choose the Sigma just for its macro function.

Here's a macro with my 17-70:

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Tamron...excellent IQ and fixed aperture.

I had the Sigma 17-70 and it was very sharp, and you could focus very close. I sold it and bought the Tamron for it's constant fast aperature and have not regretted it. Yes, the AF is loud,but it is also more accurate. And, as mentioned above, the Tamron is sharper on the wide end. I do sometimes miss the extra reach, but a few steps forward takes care of that. Hope this helps. Both are very good lenses, especially for their price.

AirbusA380 wrote in post #5222354
... rather have a fixed aperture as ...

argyle wrote in post #5222483
... fixed aperture.

To be a little pedantic here:
None of these lenses has fixed aperture. Very few lenses do, mirror lenses being the major exceptions.
The Tamron has constant maximum aperture; the Sigma 17-70 has variable maximum aperture.

xarqi wrote in post #5222528
To be a little pedantic here:
None of these lenses has fixed aperture. Very few lenses do, mirror lenses being the major exceptions.
The Tamron has constant maximum aperture; the Sigma 17-70 has variable maximum aperture.

To add to your signature: anal = "you"

tmonatr wrote in post #5222557
To add to your signature: anal = "you"

Speaking of "anal", how's your "aperature"?

xarqi wrote in post #5222589
Speaking of "anal", how's your "aperature"?

Nice sig. I'll admit, its a pet peeve of mine...just didn't know how to express it. You did well.

xarqi wrote in post #5222589
Speaking of "anal", how's your "aperature"?

You forgot "effect" and "affect".

Tony-S wrote in post #5223310
You forgot "effect" and "affect".

And let's not forget "should have", not "should of".