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07-14-2011, 02:29 PM   #1
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Tamron 17-50 F2.8 vs DA*16-50

I would buy the Tamron 17-50 for my k-x.

DA*16-50 is the most actractive alternative.

I don't need sealing and I prefere a screw driven autofocus. Tamron is also lighter and smaller than DA*.

Wich is the difference in terms of IQ and colors betwen DA* and Tamron?
Pro/cons about Tamron?

Thanks

07-14-2011, 03:19 PM   #2
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why not the Sigma 17-50? they almost cost the same as the Tamron.
07-14-2011, 04:08 PM   #3
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Get the Sigma 17-50mm like Pentaxor recommends. I do believe that it has the best IQ. And of course, it's AF is the fastest.
07-14-2011, 04:09 PM   #4
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And the DA16-45 should be tossed in as well. They occasionally pop up quite cheaply and give excellent results. I'm on my 2nd copy of the DA16-45 after trying WR kit lens, then 17-70 and 18-50 HSM/OS Sigmas.

The one consistent 'con' I hear with the Tamron is field curvature - if you shoot a flat object square on the edges will be out of focus and therefore soft. Everything else seems to be a 'pro' with that lens.

07-14-2011, 04:34 PM   #5
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I think the Tamron will have the best IQ by a bit, but the Sigma should focus more quickly and quietly. Both should have a little better IQ than the DA*. The Tamron is much less expensive than the others. I am testing it as a replacement for manually focussed primes. It's that good.

The Tamron does have curvature of field at 17mm, which can be a problem with some scenes, especially wide open. I do not know yet how serious that will be inmy field use.
07-14-2011, 05:55 PM   #6
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I have all 3: Sigma 18-50 EX DC Macro, DA* 16-50, and Tamron 17-50. They are all very good lenses. The Pentax is pretty much better than the Sigma in all aspects except for focusing speed. The Tammy is no slough; not as sharp in center but better at corner. Pentax is better for outdoor due to WR.
07-15-2011, 02:06 PM   #7
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Thanks for answers.
A lot of people say that Tamron has a better IQ with respect to Sigma.
So I didn't considered Sigma until now...
07-15-2011, 02:17 PM   #8
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I havent had the Sigma or the Pentax so make of my comments as you will, but I am VERY happy with my Tamron. I have not had a single instance where something about the lens has let me down. I find it sharp and contrasty enough at all zooms and apertures for my requirements (I am no pixel peeper, just a shooter). I have no hesitation in recommending it to anyone

You can see some of my shots with this lens here on my blog, and here on flickr

07-15-2011, 02:42 PM   #9
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QuoteOriginally posted by jezza323 Quote
I havent had the Sigma or the Pentax so make of my comments as you will, but I am VERY happy with my Tamron. I have not had a single instance where something about the lens has let me down. I find it sharp and contrasty enough at all zooms and apertures for my requirements (I am no pixel peeper, just a shooter). I have no hesitation in recommending it to anyone

You can see some of my shots with this lens here on my blog, and here on flickr
Very nice pictures!
I saw you didn't take portraits. Do you think that Tamron @50mm and F2.8 can replace my FA 50 1.4 for portraits?
07-15-2011, 02:53 PM   #10
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I dont really do portraits, but that depends. I would guess in most cases 50mm f2.8 would not give shallow enough DOF for most portrait work.
07-15-2011, 04:20 PM   #11
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Here's a review where the Tamron gets compared to other lenses:

Tamron SP AF 17-50mm f/2.8 XR Di II LD IF Lens Review

The Tamron is a very safe choice. It's pretty much a prime killer - except at 50, where it is just 2.8. You'd have trouble finding faster wide angles in its range and if you do they'd cost more than the Tamron - each.
07-16-2011, 04:27 AM   #12
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QuoteOriginally posted by Laurentiu Cristofor Quote
The Tamron is a very safe choice. It's pretty much a prime killer - except at 50, where it is just 2.8. You'd have trouble finding faster wide angles in its range and if you do they'd cost more than the Tamron - each.
good point. dont get me wrong though, i also have the sigma 30mm f1.4 and i wouldnt give it up either, hehe

but for the price the tamron is very hard to beat IMO. i think i only paid about $300 incl shipping for a brand new copy on ebay thanks to some paypal vouchers n stuff
07-16-2011, 07:04 AM   #13
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QuoteOriginally posted by gflauti Quote
Thanks for answers.
A lot of people say that Tamron has a better IQ with respect to Sigma.
So I didn't considered Sigma until now...
I found the Tammy to be better than the Sigma too.
07-16-2011, 02:43 PM   #14
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QuoteOriginally posted by jezza323 Quote
I dont really do portraits, but that depends. I would guess in most cases 50mm f2.8 would not give shallow enough DOF for most portrait work.
Very often I use my FA50mm @ F2.8 for portraits.
So for my "picture style" 2.8 should be enough.

I don't know if Tamron can give comparable results in terms of bokeh
07-16-2011, 03:23 PM   #15
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QuoteOriginally posted by jezza323 Quote
good point. dont get me wrong though, i also have the sigma 30mm f1.4 and i wouldnt give it up either, hehe

but for the price the tamron is very hard to beat IMO. i think i only paid about $300 incl shipping for a brand new copy on ebay thanks to some paypal vouchers n stuff
Anything faster than 2.8 and wider than 40mm is not threatened by the Tamron. That Sigma 30/1.4 appears to be a very nice lens from what I've seen. As for the Tamron, like you mentioned, buying it second hand can mean even larger cost savings.
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