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12-20-2010, 01:12 PM   #46
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Nice range

The 12-24 is already expensive as stated, but this 12-35mm is weather resistant. BIG plus!

12-20-2010, 01:15 PM   #47
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QuoteOriginally posted by Mike.P® Quote
No but it does qualify you as a credible source
Thank you for declaring your agenda there, though it was quite obvious anyway.

Really.

.R.
12-20-2010, 01:21 PM   #48
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QuoteOriginally posted by Marcus Quote
The 12-24 is already expensive as stated, but this 12-35mm is weather resistant. BIG plus!
Very big. It looks like Pentax might be committed to WR on all its important lenses too. A useful bonus in durability for end users.
I wonder if that could avoid fungus too over a very long lifespan?

.R.
12-20-2010, 01:41 PM   #49
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QuoteOriginally posted by stanic Quote
the 18-135 WR has SDM (silent drive mechanizm) with DC motor, so take a deep breath and dont connect DC to WR lenses only!
refer to point 3 smc PENTAX-DA18-135mmF3.5-5.6ED AL[IF] DC WR A high-zoom-ratio standard zoom lens, designed exclusively for PENTAX digital SLR cameras
Well, isn't that an interesting page? Perhaps I've been napping, but that's the first time I've seen the 18-135 referred to as SDM.

So ..... does the 18-135 use a newly-designed mechanism, an older design with sturdier parts, or has nothing changed at all over the years other than better QA at some point?

Discussed at length in these forums but I don't recall an authoritative answer.

Perhaps, to Pentax, SDM is a generic term that can cover a variety of motor types as long as they're (almost) silent. That would make sense if they want to improve the design without implying that there was something wrong with the old one.

12-20-2010, 01:50 PM   #50
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QuoteOriginally posted by FullertonImages Quote
Enough slow lenses!!!

If it were 2.8 I would be all over it, and would love it.
A 12-35/2.8 lens, if it is even possible to make, would be a very large and cumbersome thing.
12-20-2010, 02:00 PM   #51
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QuoteOriginally posted by glanglois Quote
Perhaps, to Pentax, SDM is a generic term that can cover a variety of motor types as long as they're (almost) silent. That would make sense if they want to improve the design without implying that there was something wrong with the old one.
good point
12-20-2010, 02:51 PM   #52
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QuoteOriginally posted by glanglois Quote
Perhaps, to Pentax, SDM is a generic term that can cover a variety of motor types as long as they're (almost) silent. That would make sense if they want to improve the design without implying that there was something wrong with the old one.
It certainly would cover any variety of types. Except that its namesake term "silent" which, to be truthful and correct, would have to be totally silent in AF operation.
I doubt that's possible so dropping it would at least allow them to escape legal scrutiny in countries that won't tolerate false or misleading claims in marketing and advertising.

It's not uncommon for a company to "rebrand" a same function in a product during it's lifecycle either. That's usually done for commercial advantage. Smart businesses always respond to public inclination and especially disapproval and Pentax's western~european market regions alteration here does stand out. (ref: my earlier response on this.)

What I'd like to know is what's the merit of "DC"? Surely that is a more generic label or term to use applying to motor powering. Ultrasonic (USM) is a very successful defining name used by Canon.
So is there an AC (alternating current) AF drive motor type made by Pentax or any camera company to differentiate this?

Otoh; Sigma uses "DC" in their lens nomenclature coding to mean a totally different function and purpose. And that probably sums it up, they are just letters and could not possibly even be trademarks.

Although Nikon's SWM (Silent Wave Motor) and Canon's USM might be registered TMs. Anyone know?
(If so SDM would likely be owned by Pentax too.)
The plot only ever thickens in web forums. Me must research more.

.R.

Last edited by Hypocorism; 12-20-2010 at 03:03 PM.
12-20-2010, 03:29 PM   #53
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AND Canon USM is both ring motor and plain usual motors, so ...

Smells troll. 'Ignore' mode ON.

12-20-2010, 04:21 PM   #54
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QuoteOriginally posted by Hypocorism Quote
Except that its namesake term "silent" which, to be truthful and correct, would have to be totally silent in AF operation.
I doubt that's possible so dropping it would at least allow them to escape legal scrutiny in countries that won't tolerate false or misleading claims in marketing and advertising.
Apparently you are not a lawyer. But perhaps you play one on TV?
12-21-2010, 05:33 AM   #55
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This lens does soud perfect for me. I'd love to have wide zoom with WR. f 3.5-4.5 sounds like it's enough for landscapes. And if IQ's good too, this sound like I NEED this lens! I'll put my eye on this one for now...hope it will appear.
12-21-2010, 01:50 PM   #56
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I can understand not having f/2.8 but a constant aperture would be nice. Maybe it's just a pet peeve.
12-21-2010, 11:25 PM   #57
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QuoteOriginally posted by RBellavance Quote
A 12-35/2.8 lens, if it is even possible to make, would be a very large and cumbersome thing.
Not really. The Nikon 14-24/2.8 isn't that big, and that covers an FF image circle. I'm sure Pentax could make a 12-35/2.8 the same size or smaller than the 14-24. That would be an acceptable size for me. If not, I would rather have it be constant f/4 than variable aperture. They just annoy me. Like the guy above said, it's probably just a pet peeve. But I just don't like them.
12-21-2010, 11:36 PM   #58
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+1
12-35mm is a perfect range for street and landscape photography, although constant F4 would be super nice.
12-21-2010, 11:52 PM   #59
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im hoping the max aperture @24mm is f4.. and f4.5 @25-35mm
12-22-2010, 04:11 AM   #60
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QuoteOriginally posted by rustynail925 Quote
im hoping the max aperture @24mm is f4.. and f4.5 @25-35mm
also ... it sounds plausible
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