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07/21/2004 03:49:40 PM · #1 |
| sigma couple of weeks back announced their new and improved 50 mm and 105 mm macro lenses, the new lenses scome with "DG" notation meaning they were specifically designed in operation with a digital slr camera.. the new "DG" macro lense comes with a "auto focus limiter" to improve the auto focus response speed.. only place i have found to have the new "dg" 105 mm macro lense in stock is www.adorama.com.. i m going to buy the sigma 105 mm lense but was wondering if i should buy the new and improved version or the old one.. any opinions comments? |
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07/21/2004 03:54:32 PM · #2 |
The old one has the AF limiter also.
You will most likely find that your results will be greatly improved on macro work with manual focus anyway.
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07/21/2004 03:57:35 PM · #3 |
| i didnt know the old one had "focus limiter" also.. i cant decide if i shuld spend 50 more bucks on the new and improved lense? man the decisions! decisions! |
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07/21/2004 03:59:11 PM · #4 |
I guess it would depend on what has changed other than making it DG and decide based on that.
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07/21/2004 04:01:05 PM · #5 |
| improved image quality is the one important thing they say in press release... since it is designed for dslrs now.. it will supposively have even better image quality... i wonder if autofocus is improved too.. |
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07/21/2004 04:02:56 PM · #6 |
Most of my bugs shots in the field are done with autofocus. You hold the shutter button down and when the bug is in focus it'll take the picture. It'll dramtacialy improve your "hit" rate. You don't see this technique mentionned too often. Most people think the only way to get a macro shot is to set it on manual focus and rock the camera back and forth until the subject is focused. However, I use this technique when I reverse a 50mm in front of my 105mm macro lens, because the autofocus has too much of a hard time. Whatever works best for you.
These new Sigma lenses look good. I think the changes are mostly optical improvements. It's all good. These 2 lenses are already very good.
edit: DPreview has the press release here.
Message edited by author 2004-07-21 16:04:21.
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07/21/2004 04:05:08 PM · #7 |
Where did you see the press release? Do you have a link?
I'm also looking for a macro lens and am currently considering the Tamron 90mm and the Sigma 105mm.
Thanks Jacko for the link.
Message edited by author 2004-07-21 16:05:59.
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07/21/2004 04:06:54 PM · #8 |
there's nothing special about optics when it comes to digital. it's either better glass or it's not. the only thing that may improve specifically for digital is the way it interacts with the camera (i.e., metering, AF, etc). If the optics/glass haven't improved, and the AF mechanism is the same...why spend the extra $50?
edit: according to the link and Jacko's comments, the glass is better, so it's worth it. but it still doesn't have anything to do with the fact that it's for a digical camera. :)
Message edited by author 2004-07-21 16:08:42. |
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07/21/2004 04:12:42 PM · #9 |
The old version of the Sigma 105mm Macro is already a fine lens, optically. I doubt that the new version is any sharper, the "DG" designation refers to coatings applied to the rear element to reduce reflections off the sensor (ghosting). There may, of course, be other changes, it's hard to tell. $50 is not a great difference, If I were buying it, I'd go for the new version. I'd also assume that the newer verision might be supported for "re-chipping" for a longer period than the older version, though that's not necessarily true.
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