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Old Jan 15, 2008, 9:59 AM   #1
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Opps should have posted this in the lens section.



Hi



Anyone have experience or know how good/bad this lens might be for an all purpose lens? Also a place to buy at a good price.

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Old Jan 15, 2008, 9:34 PM   #2
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rritter wrote:
Quote:

Opps should have posted this in the lens section.



Hi



Anyone have experience or know how good/bad this lens might be for an all purpose lens? Also a place to buy at a good price.
No problem really..I'll just bump this to the top so someone can answer you!



Dawg @ wrk

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Old Jan 16, 2008, 4:50 AM   #3
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None with the Pentax but I have had a brief go with the Tamron from which the Pentax is cloned &, by the way, costs somewhere in the region of UK£100 more that the Tamron.

I have also previously tested a Tamron 18-200 & found that, within the constraints of a 'super zoom', to be not bad at all.

My test with the Tamron 18-250 suggested that is had more vignetting than the 18-200, even at longer focal lengths which I found a tad unusual. Reviews tend to support this:

http://www.photozone.de/Reviews/Cano...report--review

This shot with the Tamron was taken at 250mm (375mm in 35mm terms) @ f9.5 & 1/500S & does show a darkening at the corners which I've assumed to be lens vignetting.



The graphs don't really show that much difference between the 2 lens:


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Old Jan 17, 2008, 7:05 AM   #4
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I reprocessed the image in Adobe Lightroom using the lens correction facility with the following results:



I've since 'bit the bullet' & purchased the Tamron 18-250mm @ UK£269 (including Hoya UV filter & standard 6 year warranty) as opposed to the Pentax @ UK£360 (no filter included & Pentax 1 year warranty).
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Old Jan 17, 2008, 9:12 AM   #5
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Thanks so much for your post. This helps alot.
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Old Jan 18, 2008, 6:22 AM   #6
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My Tamron 18-250mm came this morning; it's pouring with rain & the forecast doesn't look much better for next week!!

Even the cat's fed up & asleep


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