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11-29-2011, 01:17 PM   #1
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Is it worth upgrading from kit lens to Tamron 17-50?

I own a nice copy of the SMC Pentax DA 18-55 F3.5-5.6 AL II kit lens. I like the size and weight and am generally happy with the performance of the lens. Would I see a marked increase in the quality of my photos (sharpness, bokeh, color rendering) if I were to upgrade to Tamron's AF 17-50mm F2.8 XR LD Aspherical IF SP lens?

In your opinion, would this be a worthwhile upgrade?

Mike

11-29-2011, 01:22 PM   #2
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Most definitely, especially considering the $424 deal.

Check our our review:
DA* 16-50mm vs. Sigma and Tamron 17-50mm Comparison - Introduction

Adam
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11-29-2011, 01:28 PM   #3
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Yes, the Tamron 17-50 is excellent and a great price you cant go wrong. Better in every way than the kit, not too much larger, a bit heavier, it will be a very noticeable upgrade
11-29-2011, 01:38 PM   #4
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I'm torn about this. The Tamron 17-50/2.8 is indeed a better lens. Is it 300-400+ bucks better? I can't say; it's your budget, not mine.

Another factor: I'm allergic to 'upgrading'. I try to supplement instead. My original K20D kit included the DA10-17, DA18-250, and FA50/1.4. I haven't 'upgraded' any of those. Instead, I supplemented the 10-17 with a Tamron 10-24, and the FA50 with a K50/1.2, and the 18-250 with an old F35-70 and FA100-300 and some fast manual primes at critical focal lengths. I also added a DA18-55 and use it mostly to hang filters, optical adapters, other experimental stuff. It's my test-bed.

Basic lens-buying questions: What do you want to do that you can't do with what you already have? Where do you want to go, what will get you there, and how much does satisfaction cost? If you want crisper shots in the kit.lens range, then definitely buy the Tammy. If you want to do more, think about other possibilities. Cheers!

11-29-2011, 01:42 PM   #5
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I notice the Sigma has a higher score. 8.0 versus 7.7 for the Tamron. Prices here in Canada are $390.00 for the Tamron and $699.00 for the Sigma. Is there enough difference to justify the difference in cost? As well, would I notice any difference between the two lens?

Thanks for reading my post.
11-29-2011, 01:51 PM   #6
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Is it a better lens? Yes. It's not even a contest.

The kit lens has a maximum aperture of f5.6 on the long end, while the Tamron is a constant f2.8, for one thing.

Is that worth the dough? I thought so.

The kit lens that came with my K-5 back in January is still in its box, which I never even bothered removing from the kit box.
11-29-2011, 02:27 PM   #7
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If you are doing landscape I would be very happy with the kit lens. If you want to do portraits or event work go with the 2.8 Tamron.
I like very fast primes for portrait and event work so I use my kit lens for landscape ane my primes for everything else, but thats me.
11-29-2011, 02:50 PM   #8
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Is the Sigma worth $310.00 more than the Tammy. There is a slight differece in the score but I can't relate to how much of a difference .3 is. Is there $310.00 difference in the two lenses?

11-29-2011, 03:06 PM   #9
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Quick question before I send in my 17-50 to Tamron for servicing. Is it normal to have quite severe front focus at 17mm? I have this behavior with a K-5 and K20D, so the workaround is to zoom in to 50mm, focus, then zoom back out to 17mm. Not sure if it's a fault of the Pentax AF system or the lens.
11-29-2011, 03:08 PM   #10
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QuoteOriginally posted by Mapleleaf-Mick Quote
Is the Sigma worth $310.00 more than the Tammy. There is a slight differece in the score but I can't relate to how much of a difference .3 is. Is there $310.00 difference in the two lenses?
I highly doubt it. The Tammy is excellent, save your money and buy a nice prime or something You may also be reading a review of the newer Sigma with HSM which differs from the orig Pentax mount version
11-29-2011, 03:09 PM   #11
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QuoteOriginally posted by darrenleow Quote
Quick question before I send in my 17-50 to Tamron for servicing. Is it normal to have quite severe front focus at 17mm? I have this behavior with a K-5 and K20D, so the workaround is to zoom in to 50mm, focus, then zoom back out to 17mm. Not sure if it's a fault of the Pentax AF system or the lens.
What kind of light? All?

Have you tried AF adjust on the K-5?
11-29-2011, 04:00 PM   #12
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QuoteOriginally posted by Deimos Quote
What kind of light? All?

Have you tried AF adjust on the K-5?
All, indoors, outdoors, group shots, landscapes.

Tried AF adjust but only seems to affect AF accuracy at the long end. The wide end seems to always front focus.
11-29-2011, 07:00 PM   #13
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Thank you all for your replies -- I guess I'll have to open my wallet and buy myself a Christmas present!

Mike
11-29-2011, 07:24 PM   #14
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My dilemma is choosing between the Tamron 17-50 2.8 and the 28-75 2.8.
The range of the former is more convenient for walking around, but with the latter I could make up part of the difference at the wide end by carrying the DA 21 ltd around too. (it fits in a pocket, after all.) And the the 28-75 might forestall some LBA I have for the DA 70 ltd.

May I hijack the thread a bit and ask what people's opinions are between the two Tamron zooms, in terms of IQ?

As for the kit lens -- I'm happy to have it for when it's raining.
11-29-2011, 08:05 PM   #15
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QuoteOriginally posted by pentup Quote
My dilemma is choosing between the Tamron 17-50 2.8 and the 28-75 2.8.
The range of the former is more convenient for walking around, but with the latter I could make up part of the difference at the wide end by carrying the DA 21 ltd around too. (it fits in a pocket, after all.) And the the 28-75 might forestall some LBA I have for the DA 70 ltd.

May I hijack the thread a bit and ask what people's opinions are between the two Tamron zooms, in terms of IQ?

As for the kit lens -- I'm happy to have it for when it's raining.
I have the 17-50mm and love it. I don't see myself replacing it with anything from Sigma or Pentax, but in your case I say go with the 28-75mm. If you need anything wider use your 21mm or even get the 15mm.

IQ is supposed to be at the same level as the 17-50mm.

In my case I was always planning on getting the 15mm so I opted to get the 17-50mm to have something relatively fast in that range and the flexibility of a zoom.
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