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08-25-2013, 01:56 AM   #1
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Sigma Lens 28-200mm

Hi, can anyone give any feed back on a Sigma 28-200 mm UC lens please? I've been looking at one on EBay but can't find any reviews. For use with a Pentax K-30. Does it cover a full frame sensor?


08-25-2013, 02:46 AM   #2
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Hi. Have a look here:
Sigma Lenses for Pentax: Legacy Zoom Lenses - Pentax Lens Review Database
Worth pointing out that for a K30, you'd normally want a super-zoom that starts at 18mm. If you are only after the long end, the pentax 55-300 would be a much better bet, IMHO.
08-25-2013, 04:39 AM   #3
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hi ive had a look on the database dont think the one im looking at is on there, but like you say i need to start wider, i just need to be more patient
08-25-2013, 06:19 AM   #4

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If you need something quickly, get a 18-55, possibly WR. Can't go wrong for the price

08-25-2013, 09:34 AM   #5
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I think this is the lens or at least a close sibling. If you read through the reviews someone notes that this lens is available in several versions with both f/3.5 and f/3.8 max aperture.
Sigma 28-200mm F3.5-5.6 DL Hyperzoom Macro Lens Reviews - Sigma Lenses - Pentax Lens Review Database

That's assuming this is the listing you are looking at: Pentax Sigma UC AF Aspherical 28 200mm F 3 8 56 | eBay

If not, post a link to the listing and you might get more knowledgeable help. Sigma made at least three and possibly four different 28-200's.

As Calsan pointed out 28mm is not very wide on a DSLR with an APS-C sensor such as your k-30. 28mm was the default 'wide' lens on film but on APS-C digital the default 'wide' is 18mm. If you are shooting film then of course that is different. The lens was designed for film cameras so it will cover a 'full frame' sensor if one is ever brought to market. However, a Pentax 'full frame' digital camera will likely cost upwards of $2,000 so I question the use of a $100 consumer lens on such a camera. Again, if you are thinking about film, that's different and my apologizes for pointing out things you already knew.

Something like this would be the modern equivalent: Sigma 18-200mm F3.5-6.3 II DC OS HSM Lens Reviews - Sigma Lenses - Pentax Lens Review Database and a far better (and more expensive) lens would be something like the Pentax DA 18-135. or the DA 18-250 (found used occasionally).

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