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07-29-2011, 04:17 PM   #1
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I have the Pentax 12-24 but want wider...

Which lens is going to give me "Comparable" IQ, but give me more range? Sigma 8-16? Sigma 10-20? or just f it and get the Pentax 10-17 fisheye and use the lens correction in LR3? What are your suggestions? I can get the Pentax for less than $500 brand new... or I have to hunt for the others... lmk your opinions!

07-29-2011, 04:27 PM   #2
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The DA10-17 is great but defishing will reduce IQ -- you'll want to downsample defished images to keep good resolution. It's the lens that drove me to Pentax -- I use it, but as a fisheye. Be aware that fisheyes, and rectilinear ultrawides, are vastly different kettles of fish.

Many people love the two versions of the Sigma 10-20. I have also read many reports of users returning 2-3-4 copies before getting a good one, and I've talked to pros who despise Sigma's QC. I can't comment on the Sigma 8-16. I have and love the Tamron 10-24; some report problems but mine is just fine.

Whatever you buy, make sure the seller has a lenient return policy.
07-29-2011, 04:37 PM   #3
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Aside from loss of IQ de-fishing will result in an image with a narrower FOV than the 12-24

I have the sigma 10-20 version 1 and an 8 mm fisheye. The additional 2mm of the 10-20 over the 12-24 is important to me. 60% of all my shots with this lens are at 10mm
07-29-2011, 05:22 PM   #4
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Every review I've read of the 8-16 praises it. The only downside is the inability to use filters. IQ is first rate though.

07-29-2011, 06:36 PM   #5
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Crap, you know whats going to happen?

I'm going to buy the 10-17mm, and not be able to get rid of the 12-24 so I can keep the linear wide angle.... but I don't know if I want all that lovely fishiness yet...
07-29-2011, 06:41 PM   #6
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If you're looking for something wider than the DA 12-24 and prefer rectilinear distortion to circular distortion, the obvious choice is the Sigma 8-16. When I want to go wider than the DA 12-24 I either stitch together multiple shots or use the DA 10-17 and try to conceal the circular distortion as best I can (which, of course, is not always possible).
07-29-2011, 07:30 PM   #7
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You can also stitch with the 12-24 either in landscape or portrait mode....

07-29-2011, 07:54 PM   #8
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I have owned the Pentax 10-17 FE for a few years. Love it. Alternate between it and the Pentax 16-45. Beginning of the year bought the Pentax 12-24. Use it much more than I thought. It is a sharper lens than my FE. Even the 12-24 is lacking in fov, vs the Pentax A15 on LX 35mm. I miss that extra fov on digital, so I ordered the sigma 8-16. couldn't see buying the 10-20 and then wishing for wider. Now if it would only arrive.

good luck with your choice
barondla

07-30-2011, 05:43 AM   #9
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QuoteOriginally posted by twitch Quote
Every review I've read of the 8-16 praises it. The only downside is the inability to use filters. IQ is first rate though.
But what about the lens profile which isn't usable in LR3 <10?
07-30-2011, 09:10 AM   #10
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I was actually thinking of going the other way- going from a sigma 10-20 3.5 to a pentax 12-24. the pentax seems to have less distortion at the edges.
07-30-2011, 09:25 AM   #11
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The Sigma 8-16 is one of my favorite lenses. The IQ still surprises me. If I need an ND filter- about the only kind I'd use on an ultrawide - I hold a large gel in front of the hood.
07-30-2011, 10:45 AM   #12
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if you want significantly wider, the Sigma 8-16 is the way to go. no point on considering the 10-20 nor the fisheye.
07-30-2011, 11:26 AM   #13
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QuoteOriginally posted by Pentaxor Quote
if you want significantly wider, the Sigma 8-16 is the way to go. no point on considering the 10-20 nor the fisheye.
The Sigma's maximum AOV is about 115 degrees. The DA10-17's is about 180 degrees. These are totally different fish. Also, while the Sigma has good optics, they're in a questionable package: Sigma 8-16mm
07-30-2011, 01:36 PM   #14
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QuoteOriginally posted by RioRico Quote
The Sigma's maximum AOV is about 115 degrees. The DA10-17's is about 180 degrees. These are totally different fish. Also, while the Sigma has good optics, they're in a questionable package: Sigma 8-16mm
that is 180 degrees before the defish and salvagable corners before distortion correction, not to mention corner IQ as well. if the OP wants to utilize fish-eye as is, then that would be fine. but since the OP consider some corrections, it may take a lot of effort on doing such, not to mention losing some as well.
07-30-2011, 03:16 PM   #15
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I just dont think I would use the Fisheye very often. But it does look like a lot of to use!
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