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04-23-2012, 07:45 PM   #31
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QuoteOriginally posted by benhai Quote
Can this lens challenges pentax 16-50mm f2.8 at some point?
Check the review on this site.

04-24-2012, 04:03 PM   #32
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i keep hearing more and more about getting bad copies, im days away from pulling the trigger on this lens and i feel i have a 75% chance of getting a bad copy. how often do these things happen and how can my less than novice eye tell if i got a bad one
04-24-2012, 05:08 PM   #33
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QuoteOriginally posted by no694terry Quote
i keep hearing more and more about getting bad copies, im days away from pulling the trigger on this lens and i feel i have a 75% chance of getting a bad copy. how often do these things happen and how can my less than novice eye tell if i got a bad one
QuoteQuote:
Homer: "Oh, people can come up with statistics to prove anything. 14% of people know that."
Variation Facts and Fallacies: Digital Photography Review
LensRentals.com - Notes on Lens and Camera Variation

Like anything else, there's always going to be some QC variation. Example, the SDM issue may or may not be overblown, there aren't any hard statistics to show how widespread it is, if Pentax has resolved it, but seeing how it's supposed to be Pentax's 'pro' series, people have high expectations...it may or may not be a problem, but it always comes up.

With the Tamron, you aren't going to find a 2.8 17-50/18-50 for the same price, especially in K mount...there's I think that, the Sigma, or the Pentax to pick from...my copy seems fine, it focuses on what I point it at and it takes a picture. All you can really do, is buy a lens, and see if it does what you want.
04-24-2012, 05:09 PM   #34
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My copy was/is bang on... I'm not sure about how things work in the US but here in the UK if you buy new and it's not right you generally get a straight up replacement no quibble...

04-25-2012, 07:36 PM   #35
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Yep, fantastic lens!
I've used it on weddings, landscape, city walking, portraits, and even short films. Always performs admirably.

Sometimes I'll use it after not for a couple months and get blown away by the quality all over again.
04-26-2012, 04:49 AM   #36
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I just bought my Tamron 17-50, a type F remote and a Hoya UV filter the B&H. I got my tamron 70-300 through them and like it so far, so hope the same goes this time. Can't wait til they get here. Although i didn't follow the directions very well on the site support
04-09-2015, 12:29 PM   #37
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QuoteOriginally posted by Edgar_in_Indy Quote
I briefly owned a Tamron 17-50mm, and my experience was very similar to yours, but I ended up returning it. I noticed that it was darker than my Tamron 28-75mm f/2.8 and my Pentax 18-55mm kit lens at identical apertures. The problem got worse as I stopped down, and by f/9 or f/10 it was a full stop darker, but even wide open it was still a half-stop darker, like around f3.3 equivalent. I returned it, since I wanted an f/2.8 lens that acted like an f/2.8 lens. You can see pictures from my 17-50mm here demonstrating the problem:

Tamron 17-50mm f2.8 not as fast (bright) as Tamron 28-75mm f2.8 on Pentax K-x, PICS - PentaxForums.com

I know this lens is generally praised, so I've always wondered it it was just my copy, or if this is common and most people just don't notice it. If you still have your kit lens around you might try shooting an identical scene at f/10, and see if exposure is the same with both lenses.
What do you use now for the 16/17-50 range at 2.8? Sigma? Pentax?
04-10-2015, 09:52 AM   #38
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QuoteOriginally posted by rzarector Quote
What do you use now for the 16/17-50 range at 2.8? Sigma? Pentax?
I have my Sigma 8-16mm, and in addition I usually have a good compact with me, all of which have very bright lenses at the wide-end, which does a lot to mitigate the smaller sensor. It was originally the Olympus XZ-1 (which I now keep in my car), then it was the Sony RX100-II, and now I have the Panasonic LX100, which has a very large sensor and is f1.7 at the wide end.

I've thought about picking up a Sigma 17-50mm, but I can never talk myself into it. It just seems like a little bit of an awkward range to me now. Not very wide, and not very long, so I just don't know how often I would put it on and use it.

04-14-2015, 06:40 AM   #39
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just saw this on ebay

Tamron 17-50, good price i think

I'd buy it if i had the money, I had one of these lenses and loved it. Sold it to buy my 18-135WR when i had a K5
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