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11-10-2009, 10:58 AM   #1
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Is Tamron 17-50mm F2.8 a good lens?

I found very few reviews online about this lens for Pentax dslr. What do you feel about this lens?

11-10-2009, 11:04 AM   #2
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PentaxForums.com Third-Party Pentax Lens Review Database - SP AF17-50mm F/2.8 XR LD ASPHERICAL (IF)

Have one and is perfect.
Read the reviews on the link
11-10-2009, 11:09 AM   #3
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Well, from personal experience, I think it greatly matters what camera you are using... I just bought this lens for a K200D ... and I am about to return my second copy, as I am convinced it front focuses (you can read more on my thread titled similarly) ... and this seems to have been reported elsewhere as well, incl. this forum's lens review section...

other than that, if you use MF then it is as good as the reviews say it is ...
11-10-2009, 11:29 AM   #4
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Sorry to hear that you got 2 bad copies. I use K100d. Do you mean if the camera body has focus adjustment then it will be no big problem?

11-10-2009, 11:44 AM   #5
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My daughter uses this on her Canon 40D and it is her main lens. She gets great results with it. I think the Pentax DA*16-50 is a better lens but the Tamron is on par with it as far as IQ goes IMHO.
11-10-2009, 11:57 AM   #6
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QuoteOriginally posted by quaker Quote
Sorry to hear that you got 2 bad copies. I use K100d. Do you mean if the camera body has focus adjustment then it will be no big problem?
I would assume that with in-body focus adjustment you could get around it ... but for K200D there is a hack which adjusts AF overall (since it is not a standard feature), not per lens used, and then I think such adjustment would interfere with lenses which work ok with the camera otherwise...

But my thread is still open and I am still 'collecting' feedback from other members here... let's see... I really want to keep the lens but I am not open to hacking my firmware to use a new lens ...
11-10-2009, 08:59 PM   #7
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It is a very very very nice lens. I use it as my walkaround lens. Though something weird happened the other day, I pulled the lens out of my camera bag and the glass (yes the lens) fell out. I don't know how or why that happened, but I had to re-assemble the entire front end of that lens.
11-10-2009, 09:03 PM   #8
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QuoteOriginally posted by innershell Quote
It is a very very very nice lens. I use it as my walkaround lens. Though something weird happened the other day, I pulled the lens out of my camera bag and the glass (yes the lens) fell out. I don't know how or why that happened, but I had to re-assemble the entire front end of that lens.
Woh. That's wierd. OK, Tamron aren't known for their top notch build quality, but that shouldn't happen - was there any knock the lens took at any time previously?

11-10-2009, 09:14 PM   #9
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QuoteOriginally posted by Ash Quote
Woh. That's wierd. OK, Tamron aren't known for their top notch build quality, but that shouldn't happen - was there any knock the lens took at any time previously?
Nope, no knocks. Just pulled it out of the bag and off popped the lens. All 3 screws holding the glass bezel had unwound itself. If it was knocked, I would assume that the bezel would have broken or the screws stripped out. All I had to do was screw them all back in and it was good to go.
11-10-2009, 10:53 PM   #10
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There is/was a known issue with (at least some of) the front element assemblies on the 17-50. Mine developed a wobble/jiggle and I called Tamron USA; they knew immediately what I was talking about and had me send it in for repair under warranty. Turned it around in 2 weeks and it never gave me a problem from then on.

Lovely lens, if it had been 35mm compatible it would still be in my bag today.
11-11-2009, 07:00 AM   #11
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Mine works just dandy.




Pentax K20D
Tamron 17-50/2.8
Pentax AF280T

11-11-2009, 07:44 AM   #12
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As does mine:


11-13-2009, 12:03 PM   #13
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I have shot my 17-50 Tammy with the K20d for over 18 months now. I posted a review in our reviews section. A picture says a thousand words, and actions speak louder than words, so I'll take some action and post some pics.

One thing I love about New England is you truly get 4, distinct seasons. Here is the 17-50mm, at apertures ranges f3.2. f8, f13, and f16. And here are shots from the Spring, Summer, Fall and Winter, respectively.

Last edited by Jewelltrail; 01-31-2010 at 10:52 PM.
11-13-2009, 04:24 PM   #14
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As the new owner of Venturi's lens I can verify it's a keeper. Great overall IQ with stunning sharpness for a zoom. Build quality isn't anything special but it's very solid with tight tolerances, if it was metal I would be a DA*.

K20D, 50mm, f/2.8


K20D, 17mm f/2.8

Last edited by nobbsie; 11-13-2009 at 06:23 PM.
11-13-2009, 09:56 PM   #15
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QuoteOriginally posted by nobbsie Quote
As the new owner of Venturi's lens I can verify it's a keeper.
Ahhh. Nice to see "she's" working out well for you! I do miss her a tad but her elder sister (28-75) is doing a fine job of keeping me company.
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