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03-14-2012, 08:23 AM   #1
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Please rate these Third party lenses

Please rate these brand name lenses for general overall Quality and Sharpness ( if there is such a thing ) and if you have an outstanding example of one . Sigma...Tamron...Tokina. Thank you

03-14-2012, 08:46 AM   #2
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There you go.... theses nice people have done it for you
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03-14-2012, 08:47 AM   #3
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Tokina - built like a tank.

That is all.
03-14-2012, 09:09 AM - 1 Like   #4
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You didn't list any specific lenses; just names of companies who make lenses. All companies have better and worse lenses. But once you know *specific* lenses lenses you are interested in, there are lots of ratings and reviews right here in the lens database: click on Lenses in the menu above to get started.

03-14-2012, 09:32 AM   #5
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QuoteOriginally posted by Marc Sabatella Quote
You didn't list any specific lenses; just names of companies who make lenses. All companies have better and worse lenses. But once you know *specific* lenses lenses you are interested in, there are lots of ratings and reviews right here in the lens database: click on Lenses in the menu above to get started.
What he said. Throw in the fact that the brands you listed have been around for 45+ years and the quality (for Sigma at least) may not always have been consistent and it is even harder to make a generalization by brand.


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03-14-2012, 09:32 AM   #6
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Look at the lens reviews. Sigma > Tamron though, as far as technology and selection goes.

Sigma Lenses - Pentax Lens Review Database
Tamron Lenses - Pentax Lens Review Database
Tokina Lenses - Pentax Lens Review Database

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03-14-2012, 09:19 PM   #7
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All lensmakers (Pentax-Nikon-Canon included) have some products that are gems and some that are turds. As mentioned, Sigma lenses have a reputation for inconsistent quality. Tamron offers a VERY long warranty on their new glass. The best I can say about 3rd-party lenses in general is that I haven't yet run across a bad one badged as Sears -- and mine were variously made by Tomioka, Samyang, Tokina, Cosina, and Ricoh. But lines of lenses can't be judged; individual models can be judged, but even those may show significant copy variation (especially Sigma). Your best bet is to refer to user reviews of specific models. Good luck!
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