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08-27-2013, 09:07 PM   #1
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Sigma vs. Sigma

Tomorrow before noon I'm gonna pull the trigger on a new lens purchase. I've narrowed it down to two lenses that fit my budget and will probably suit my needs as a general purpose better-than-the-kit-lens lens for my K-5. I have to choose between the Sigma 17-70mm F2.8-4.5 DC Macro and the Sigma 24-70mm F2.8 EX DG Macro. I've read the reviews and done the math but I just can't decide. The aperture ring on the 24-70 is a plus because sometimes I shoot film, but would I ever want to put such a big lens on an ME Super? So here's my question: Have any of you had any experience with both lenses? Help me decide which one to buy tomorrow.


Last edited by ap_exclamationpoint; 08-27-2013 at 09:16 PM.
08-27-2013, 09:19 PM   #2
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I would choose the 17-70 for the focal length. 24 is not particularly wide. Of course we have no idea what you shoot or what you like, or your other equipment, and we can't make your personal decisions. Perhaps if you think of the next couple lenses you want, it will make the first choice easier.

Hope that helps :-)
08-27-2013, 09:19 PM   #3
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I have the 17-70 F2.8-4, and the image quality - while better than the kit lens - will not be better than the 24-70 EX DG Macro, especially at the 70mm. So not only will you be down a stop at 70mm, you will need to stop down at least one stop more to be equal.

The 17-70 is nice for the extra width, and it is smaller. If I had a choice though, I would have gone back and gotten a 17-50 or 24-70 or 28-75 instead of my 17-70.
08-27-2013, 09:43 PM   #4
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Here's the deal. I own quite a few prime lenses that are sharp and are great lenses, I just can't carry them all with me when traveling. So I'm hunting for the perfect compromise: as sharp and fast as possible with a good focal range for under $500US. Anyone else have experience with the sigma 24-70 EX DG Macro?

08-27-2013, 10:17 PM   #5
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QuoteOriginally posted by ap_exclamationpoint Quote
Tomorrow before noon I'm gonna pull the trigger on a new lens purchase. I've narrowed it down to two lenses that fit my budget and will probably suit my needs as a general purpose better-than-the-kit-lens lens for my K-5. I have to choose between the Sigma 17-70mm F2.8-4.5 DC Macro and the Sigma 24-70mm F2.8 EX DG Macro. I've read the reviews and done the math but I just can't decide. The aperture ring on the 24-70 is a plus because sometimes I shoot film, but would I ever want to put such a big lens on an ME Super? So here's my question: Have any of you had any experience with both lenses? Help me decide which one to buy tomorrow.
The sigma 24-70 is a beast due to the constant F 2.8 aperture. But also consider it is a full frame lens, so it is not just the aperture ring that is important, (any camera past about 1985 can use a lens without aperture ring) but the 17-70 does not cover the full frame of a film . The DC vs DG suffix in the lens type identifies the 17-79 as a lens for crop sensor

Fr a camera like the K5 with its high ISO capability not having F2.8 at 70mm is not a show stopper
08-27-2013, 11:15 PM   #6
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QuoteOriginally posted by Lowell Goudge Quote
The sigma 24-70 is a beast due to the constant F 2.8 aperture. But also consider it is a full frame lens, so it is not just the aperture ring that is important, (any camera past about 1985 can use a lens without aperture ring) but the 17-70 does not cover the full frame of a film . The DC vs DG suffix in the lens type identifies the 17-79 as a lens for crop sensor

Fr a camera like the K5 with its high ISO capability not having F2.8 at 70mm is not a show stopper

Yes, you certainly would not want to put the 17-70 on an ME super, as the image corners would be black.
08-28-2013, 06:26 AM   #7
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I'm going to agree with the others here:

If you want to use it for film, you'll have to get the 24-70, as it's a full frame lens, while the 17-70 is not.

24mm is not very wide on APS-C, so if you want to take wide angle shots with your K-5, you'll need two lenses.

Would your budget let you pick up a Sigma 12-24 also? That's wide on APS-C, and VERY wide on film.
08-29-2013, 01:14 PM   #8
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QuoteOriginally posted by thornburg Quote
I'm going to agree with the others here:


Would your budget let you pick up a Sigma 12-24 also? That's wide on APS-C, and VERY wide on film.
I have the Pentax 10-17mm and I still have the kit lens along with a bunch of others including some nice primes (AF 24mm Super Wide II, DA 40mm XS, M 28mm, M 50mm)... The only thing missing from my bag is a decent do-it-all replacement for the kit lens. Still haven't bought anything. I'm probably gonna go with the 24-70mm. It looks like there's two versions of it though (aspherical and aspherical macro). Not sure which version is better and I'm having trouble finding the macro version.

08-29-2013, 01:47 PM   #9
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QuoteOriginally posted by Lowell Goudge Quote
The sigma 24-70 is a beast due to the constant F 2.8 aperture. But also consider it is a full frame lens, so it is not just the aperture ring that is important, (any camera past about 1985 can use a lens without aperture ring) but the 17-70 does not cover the full frame of a film . The DC vs DG suffix in the lens type identifies the 17-79 as a lens for crop sensor
Do not think the MZ5n can
08-30-2013, 08:37 PM   #10
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QuoteOriginally posted by redrockcoulee Quote
Do not think the MZ5n can
...or the K1000 or any number of other K-mount cameras available after 1985 that lack provision for controlling the aperture from the camera body.


Steve
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