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05-28-2009, 06:38 AM   #16
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There is a Sigma 18-50 recently posted in the market place. Asking price is $300.

https://www.pentaxforums.com/forums/photographers-marketplace/61650-sale-sigm...-dc-macro.html

Tim

05-28-2009, 06:49 AM   #17
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Tamron 17-50/2.8 = Incredible lens.

Jason
05-29-2009, 04:31 PM   #18
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I recently picked up a nicer older lens ... it's not so wide in focal zoom range though ... but I have the Sigma 17-35 f/2.8-4 lens .... and it's actually a really nice lens indeed ... and for the price I am impressed.

It's is a decent size though ... pretty close in physical size to my Sigma 28-70 f/2.8
05-29-2009, 10:14 PM   #19
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QuoteQuote:
NaClH2O: I'm looking for a constant aperture zoom lens in the wide angle to "normal" range. When I got my K20D I gave my K10D body and the two "kit" lenses (along with some other stuff) to my brother-in-law. I now find I'm looking for a replacement for the 18-55. My requirements are:
1) constant aperture
2) no more than a 4X zoom
3) wide end around 16-18mm
4) auto aperture
A little over a year ago, when I found myself in this position, I opted to go with the Tamron 17-50. I spent a lot of time reading reviews by owners of the lens and was amazed by what I was reading. Back then the lens was only emerging in Pentax mount, so I relied on Canon & Nikon owners' accounts of the Tamron. It was impressive just how much they loved the lens, many of them saying it performed with or outperformed the much more expensive Canon & Nikon counterparts. And outside of owners' reviews, the lens got impressive numbers in the testing labs.

What is a treat is the lens' performance wide open--why else buy a 2.8 lens? And starting @ 3.2 on down the lens just gets better all the way until diffraction issues set in. It also has great performance to the edges. I have yet to do it, but have to believe it will produce beautifully at extra large print sizes--a perfect companion for the K20 & K7 if you have this goal in mind.

You own the 28-75 brother and I perfectly understand why you would consider carrying overlap. I too am considering picking up the 28-75 mainly because I would love its longer reach & f2.8 for indoors. That lens is known for great performance. Trouble is, I just picked up the Sigma 10-20 and now I really have to make some choices.

06-11-2009, 12:18 PM   #20
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I replaced the Kit Lens with the DA 17-70. I have been surprised and pleased by its quality, even at 70mm and F/4. I won't be throwing away my primes, but as a replacement for the kit, this really fits the bill both in sharpness and in that extra reach. It is even a stop faster than the kit lens at the tele end.

As a bonus, with the SDM, it is completely silent. My Sigma 17-35/2.8 was an attention-getter at a wedding a while back, with its rather noticeable chirp during focus.
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