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12-04-2009, 06:24 PM   #16
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But its better than a constant f4 coz its f2.8 at the wide end and still f4 at the long end. If the price is about $300 and has better IQ than the previous one it would be a great deal

12-04-2009, 08:10 PM   #17
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QuoteOriginally posted by rustynail925 Quote
But its better than a constant f4 coz its f2.8 at the wide end and still f4 at the long end. If the price is about $300 and has better IQ than the previous one it would be a great deal
I don't think there is a chance in the world that it will be about 300 dollars. 450 that Amazon is preordering it for is more like it. I think you really want your lens to be faster on the long end, if possible, because that is where a faster shutter speed is more important. Just saying.
12-04-2009, 08:36 PM   #18
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My 2 Sigma lenses are right on the money so I love Sigma's but they are both constant 2.8. I'm glad I didn't go for the old Sigma 17-70 a couple of weeks ago.. Now I can get the new one for my walk-around lens.

Last edited by Fl_Gulfer; 12-05-2009 at 09:21 AM.
12-05-2009, 05:12 AM   #19
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How long will it take until the lens starts dropping? Like this new sigma for example @450 will it ever go down to $350 level?

12-05-2009, 05:20 AM   #20
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I would bet it eventually drops to about 400 dollars. The old Sigma 17-70 runs around 370 new and an update is a perfect time for them to raise prices a little. The yen is very strong right now and that keeps lens prices relatively high, even from off brand companies.
12-05-2009, 05:32 AM   #21
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Perhaps this will prompt Pentax to drop the price of the DA17-70

A man can hope, can't he?

12-05-2009, 06:34 AM   #22
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QuoteOriginally posted by Finn Quote
So...what exactly is the appeal of an image stabilized lens on a Pentax (other than maybe an *ist series or K110D)?
Price point on the non-stabilized version of this lens for those of us that ask the question...

QuoteOriginally posted by Finn Quote
So...what exactly is the appeal of an image stabilized lens on a Pentax (other than maybe an *ist series or K110D)?


woof!
12-06-2009, 01:59 AM   #23
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With its macro capabilities how close can you focus on the subject with this lens compared to a kit lens 18-55?

12-06-2009, 04:32 AM   #24
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QuoteOriginally posted by rustynail925 Quote
With its macro capabilities how close can you focus on the subject with this lens compared to a kit lens 18-55?
The announcement says 22cm, 1:2.7 magnification. The kit lens is 25cm and 1:3. And the old version of the sigma - 20cm, 1:2.3.

Last edited by Blaze; 12-06-2009 at 04:34 AM. Reason: fixed
12-07-2009, 10:59 AM   #25
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QuoteOriginally posted by yeatzee Quote
i vowed to never buy another lens that does not have a constant F-stop so I'll pass.....
Think of it as a Sigma 17-70mm f4 OIS lens then?

Thank you
Russell
12-07-2009, 11:06 AM   #26
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QuoteOriginally posted by Finn Quote
So...what exactly is the appeal of an image stabilized lens on a Pentax (other than maybe an *ist series or K110D)?
Do you have to wait for the stabilization to engage with in lens stabilization?

Thank you
Russell
12-08-2009, 02:37 AM   #27
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Interesting featureset and pricepoint... anyone knows how reliable HSM is as opposed to pentax sdm in terms of durability?
12-08-2009, 06:38 AM   #28
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QuoteOriginally posted by Russell-Evans Quote
Do you have to wait for the stabilization to engage with in lens stabilization?

Thank you
Russell
Yes, you do.
12-08-2009, 04:05 PM   #29
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QuoteOriginally posted by Rondec Quote
Yes, you do.

Some interesting reading, a post by a owner of the Sigma 18-250mm OS on DPR.

QuoteQuote:
  • Optical stabilisation systems are always active, that is why there is no startup time. This also means that they draw more energy from batteries than in-body systems that starts up when you press the shutter.
The Sigma OS is always active but not always draining the battery. Here's what happens - when you first turn on the K-7, you hear a tiny noise in the lens. The OS is "warming up". It takes about a minute, according to Sigma's instructions. From that point on, you can flip the little OS switch on and off at will. "Off" stops battery drainage.
It appears from the post that when fully on, there is no waiting for the stabilization to engage. I think that would be really helpful when trying for fast action shooting.

Thank you
Russell

Last edited by Russell-Evans; 12-08-2009 at 05:17 PM.
12-08-2009, 04:17 PM   #30
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The question that I have is how much more reliable Sigma HSM is than SDM. I have heard a lot of negatives about Sigma lenses -- poor quality control, etc. But do they hold up well over time?
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