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02-23-2011, 07:08 PM   #1
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Does the new sigma 8-16 make Pentax unlikely to release a DA* UWA?

Just curious, would sigma producing this lens now discourage pentax from creating something like a DA* 10-16 F4, seeing as the sigma is becoming a popular lens? I wouldn't think the 12-24 would make it unlikely seeing as we have both the 16-45 DA and the 16-50 DA*. A DA* weather sealed UWA is really missing in the lineup.

Also are patents always uncovered of future lenses before their release or is that not always the case?

02-23-2011, 07:20 PM   #2
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Having nothing to back this up besides what makes sense to me, I'd say the opposite. I would think that if they see a lens of this type making in-roads with Pentax users they would be more willing to "one-up" Sigma. Perhaps this would be done by offering a DA* version.
02-23-2011, 07:52 PM   #3
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There was a DA* 12-35 patented recently. Not as wide as 8-16 but much more versatile. And weather sealed.
02-23-2011, 08:55 PM   #4
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QuoteOriginally posted by gtl Quote
There was a DA* 12-35 patented recently. Not as wide as 8-16 but much more versatile. And weather sealed.
I was going to mention that one. That would be a great lens if they actually made it. If it had the IQ of the 12-24 or da15, I would probably save up and buy that one instead, for the WR.

02-23-2011, 09:12 PM   #5
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* lenses are by definition fixed-aperture, so we probably won't see anything below 12mm, but a 12-35 sounds feasible.

Sigma is coming out with a weather-sealed 12-24 if you don't want to wait!

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02-23-2011, 11:00 PM   #6
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QuoteOriginally posted by Adam Quote
Sigma is coming out with a weather-sealed 12-24 if you don't want to wait!
While I haven't done due diligence and actively searched for it on my own, I'm curious to know if the weather sealed 12-24 has the same formula as the previous version. Photozone demonstrated some respectable figures in terms of sharpness (for the Nikon version at least; the Canon mount scored much lower, most likely a bad sample). The Sigma 12-24 seems to be unusually low in distortion at all focal lengths, yet shows rather high chromatic aberration.

The Sigma 8-16, on the other hand, has modest distortion and manageable CA. Again, this is according to Photozone, and the sharpness figures seemed quite good, too.

For my money, I would hope Pentax produces something with sharp, sharp, sharp resolution and modest CA if there has to be a compromise. I don't worry too much about distortion; I don't shoot architecture with any regularity, and while I can't speak for a serious architecture photographer I would guess their preference would be to use a stellar prime like the DA 15mm f/4.

Mostly, I want Pentax to make the 12-35mm, if it ever comes out, to pick up the slack where the extreme wide angle of my DA* 16-50 is the weakest in terms of resolution. In fact, I couldn't help but hope for a lens to complement the 12-35mm, like a DA* 35-105 or something similar.
02-24-2011, 12:49 AM   #7
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I am looking forward to the 12-35mm...maybe it can even replace my 17-50mm Tamron. That plus the 50-135mm would probably be better than my current 17-50mm and 50-135mm combo right? Too bad it'll probably cost a lot.
02-24-2011, 02:34 AM   #8
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My impression was the 12-35 will not be a DA* lens but a variable aperture DA WR lens with weather resistance equal to that of the WR kit lenses, not fully sealed like the DA* lenses. It really is a shame the tokina 11-16 F2.8 never came to be as a DA* lens. The rumored 10-16mm F4 that was speculated on in the japanese magazine a while back that got some of us excited would be even better.

02-24-2011, 02:35 AM   #9
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Do we have any idea what level of weather resistance these new sigmas will receive? Will it be on par with DA* sealing?
02-24-2011, 04:17 AM   #10
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QuoteOriginally posted by Adam Quote
* lenses are by definition fixed-aperture, so we probably won't see anything below 12mm, but a 12-35 sounds feasible.
I seem to be missing something. The Sigma 10-20/3.5 is a constant aperture lens and goes down to 10mm. Anyhow, the challenging end for retaining constant aperture is the long end, not the short one.
02-24-2011, 06:18 AM   #11
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sigma and pentax are different company..so that is no reason why pentax would not produce UWA even sigma has 8-16mm..but it will something start with 12mm..

if im not mistaken, da10-17 FOV at 17mm is nearly same with the FOV of 10mm on rectilinear lenses..because of this, we wont see anything below 12mm like adam said before

da10-17 and da12-24 is a good pair for UWA
02-24-2011, 06:54 AM   #12
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I'm not sure how likely that kind of lens was from Pentax anyway. Pentax has not been sticking its corporate neck out much with highly specialized lenses in recent years. I'm not sure it can afford to.
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