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02-16-2008, 11:13 AM   #1
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Pentax 12-24 vs. Sigma 10-20

What do you guys think is the better option? The pentax is a nice lens, and faster. But the sigma is wider, and significantly cheaper. Opinions from people who have used one or both would be appreciated! Pics are great too!

02-16-2008, 01:30 PM   #2
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Pretty sure this has been covered here before. Poke around a bit and you'll find some information. also has very good reviews on both lenses. I'm interested in these lenses myself and have read a bit on them. The consencious seems to be that they are both very good to excellent. The Pentax might be a bit sharper than the Sigma, but for the money the Sigma is excellent. Users of either lens have written favoriably about their performance. For myself I've saving up for the Sigma since I will enjoy the extra 2mm on the wide end and will let my Pentax 16-45mm cover the rest of the normal range that I normally use.
02-16-2008, 01:40 PM   #3
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if you wait, the tamron 10-24 might be the ultimate within these 3 lenses.
02-16-2008, 02:06 PM   #4
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Hi pentaxkman

Try these links below concerning the Sigma. There are some useful additional links halfway down the first post, which will take you to the Flickr site:

The complete thread is here:

Best regards

Last edited by Confused; 02-16-2008 at 02:12 PM.
02-16-2008, 05:16 PM   #5
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Sigma is also less prone to CA, better lens in all ways.
02-16-2008, 05:53 PM   #6
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In the overall scheme of things, there are really 4 different zooms to consider, 5 if you count the new tamron.

these are

sigma 10-20
Sigma 12-24 EX DG
pentax 10-17 fish eye
pentax 12-24
tamron 10-24

I decided on the sigma 10-20, based upon 1) I wanted a rectalinear lens not a fisheye, and 2) i wanted the additional 2mm in width. I already had a FF 18mm-35mm zoom which I used on my PZ-1 and wanted a little wider for interior shots and archetecture, the 10-20 is equivelent to a 15mm full frame lens.

Note however, if 12mm is wide enought for you on a DSLR, and you also want to do some extreme wide angle shots on film, the sigma 12-24 is a full frame lens, and is also rated slightly higer than the 10-20 in image quality.
02-16-2008, 06:23 PM   #7
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I have not used the sigma, but I'm very happy with my Pentax DA 12-24. And despite rumors to the contrary, I've found very little purple fringing or other CA with this lens. Check out my LBA post on it:

NaCl(I'd buy it again in a heartbeat)H2O
02-16-2008, 10:01 PM   #8
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I have the Sigma 10-20mm. The 2mm wider is significant. I have so much fun on 10mm.


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