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11-10-2007, 03:29 PM   #1
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Sigma EX 24 1.8 DG

Hi!
Have anybody the Sigma EX 24 1.8 DG and can tell me how it is?
Thanks!

greetings
Mario

11-11-2007, 01:46 AM   #2
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Is is quite good. In principle.
Most exemplars show a focus error and you have to send it in to Sigma for calibration.

I desparately wanted a 20/1.8 and, of course, it showed strong backfocus (unusable).
I had to send camera and lens to Sigma. After adjustment it works fine:


Last edited by blende8; 11-11-2007 at 06:08 AM.
11-13-2007, 12:40 AM   #3
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The DG 24mm is a wicked tool for selective focus. Its wide aperture and close minimum focus distance give it options that most non-Sigma lenses do not have. I'd say it has less pleasing color than Pentax lenses but contrast & saturation are good overall. The bokeh is pleasing to my eye except for certain OOF lights that create strong visual distractions instead of blending into the background. I'm not talking about specular highlights or reflections but some direct lights in the background. I don't find it happens often but from time to time. Sharpness is good in the center and decent around the edges. It firms up quite a bit as the aperture closes down and can shoot very nice landscape photos.
11-13-2007, 02:56 AM   #4
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thanks for your comments.

i'm not sure what lens it should be. the fa 35 or the sigma 24 1.8. both have the same price.
i prefer the wideness of the sigma, so i have a 36mm on digital. in addition to that it has a fast aperture. on the otherside it is not really light, but this is not a problem.

please can you show me some pictures with the sigma?
would be very nice.

mario

11-15-2007, 03:51 PM   #5
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Mario,

Here are some from the Sigma 24mm 1.8:
Sigma 24 Photo Gallery by alinla at pbase.com

Here are a few from the Pentax FA 35 2.0 that I sold:
FA 35 Photo Gallery by alinla at pbase.com
11-15-2007, 04:35 PM   #6
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ok getting a little concerned

I have to say that I am getting a little concerned about my latest purchase a sigma 28mm 1.8 lens from everything that people on here are saying it sounds like the sigmas are lousy is this simply band bias or are sigmas that bad I am looking at getting a sigma 24-70 2.8 as well but after seeing all the negative comments about sigmas here am starting to wonder
11-15-2007, 04:49 PM   #7
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QuoteOriginally posted by gokenin Quote
I have to say that I am getting a little concerned about my latest purchase a sigma 28mm 1.8 lens from everything that people on here are saying it sounds like the sigmas are lousy is this simply band bias or are sigmas that bad I am looking at getting a sigma 24-70 2.8 as well but after seeing all the negative comments about sigmas here am starting to wonder
It's not that all Sigma's are bad, but they do seem to have a lot of QA issues. If you do some research, you'll find that a couple Sigma lenses are very popular. People seem to really like the Bigma and the 70-300mm lenses.

From what I've read, the 24-70mm is pretty good, but the Tamron 28-75mm is more highly regarded.
11-15-2007, 05:40 PM   #8
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Sigma lenses are not lousy or bad. Many of them perform quite well which is wonderful since they cover many focal lengths/ranges that we cannot find in a OEM Pentax model.

However, some Sigma lenses have errors when purchased new such as focus errors or decentering issues. A simple check of a new lens will reveal any problems. I don't find it as much of an issue as you can generally return a lens that has a defect to either the retailer or if you prefer to Sigma for warranty repair. If your situation prohibits you from returning a lens, then the situation is different. But once you get a good copy of a lens, its no different from any other lens really.

11-15-2007, 05:42 PM   #9
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I've had good luck

QuoteOriginally posted by gokenin Quote
I have to say that I am getting a little concerned about my latest purchase a sigma 28mm 1.8 lens from everything that people on here are saying it sounds like the sigmas are lousy is this simply band bias or are sigmas that bad I am looking at getting a sigma 24-70 2.8 as well but after seeing all the negative comments about sigmas here am starting to wonder
Sigma lenses can be a bit hit-and-miss -- but any more than other brands? That I'm not so sure about. I've read plenty of quality control type complaints about Pentax and Tamron as well. If possible, it's probably better to try out any lens on your camera before you buy it. Anyway, if it makes you feel better, my guess is that the vast majority of lenses, of all brands, function as intended.

For what it's worth, I have the Sigma 24 and the new 18-50 f/2.8. Both work just fine.
11-17-2007, 04:11 AM   #10
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No issues

I have several Sigma lenses
10-20mm
18-125mm
24mm f/1.8
28-70mm f/2.8
70-300mm
300mm f/2.8

I have not had any issues with focusing or any lens aberrations.

Either I am lucky or ignorant.

Crash
11-17-2007, 09:36 AM   #11
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No QC issues here either...

I have had and still do have a few sigmas... never had any issues.

that goes for the 70-200, 105 macro and 17-70.

I did have a 20mm prime for test, but opted for the DA21 between the two.

Darren (DPR) have produced excelelnt shots with the 28 and just look at als examples from the 24.

Sigma does indeed make fine lenses I think.
11-17-2007, 10:40 AM   #12
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The lenses themselves, the optics, are good or even very good.
What is a problem often is a mismatched AF.
I am now very satisfied with my 20/1.8.
11-17-2007, 12:40 PM   #13
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@alinla: very nice shots! with both lenses.
why have you sell the fa 35?


i have already found a good priced fa 35 and on ebay is an auction of a sigma 24 1.8.

i will try to get this sigma. then i will make an side by side comparison. then i will decide.
11-17-2007, 02:29 PM   #14
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well the last few comments make me feel a little better will just have to wait till the 28mm f1.8 that i got on ebay shows up early next week so that i can try it out and see how i like it am off to play with my new lens tonight and tommorrow (tamron 28-75)
11-28-2007, 01:16 AM   #15
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QuoteOriginally posted by amygdalax Quote
@alinla: very nice shots! with both lenses.
why have you sell the fa 35?


i have already found a good priced fa 35 and on ebay is an auction of a sigma 24 1.8.

i will try to get this sigma. then i will make an side by side comparison. then i will decide.
I wanted a fast lens for indoor use. The 35 was just too narrow and I was constantly backing up to take photos instead of moving forward or staying still. It wasn't the right lens for me. The 24 of the other hand is great. I just wish Pentax made one.
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