Pentax Files DA12-35mm f3.5-4.5 WR SDM Patent

Marcus · 12-20-2010, 01:12 PM

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

Hypocorism · 12-20-2010, 01:15 PM

Originally posted by Mike.P®

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.

Hypocorism · 12-20-2010, 01:21 PM

Originally posted by Marcus

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.

glanglois · 12-20-2010, 01:41 PM

Originally posted by stanic

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.

RBellavance · 12-20-2010, 01:50 PM

Originally posted by FullertonImages

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.

stanic · 12-20-2010, 02:00 PM

Originally posted by glanglois

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

Hypocorism · 12-20-2010, 02:51 PM

Originally posted by glanglois

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.

thibs · 12-20-2010, 03:29 PM

AND Canon USM is both ring motor and plain usual motors, so ...

Smells troll. 'Ignore' mode ON.

**rparmar** · 12-20-2010, 04:21 PM

Originally posted by Hypocorism

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?

repaap · 12-21-2010, 05:33 AM

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.

sewebster · 12-21-2010, 01:50 PM

I can understand not having f/2.8 but a constant aperture would be nice. Maybe it's just a pet peeve.

FullertonImages · 12-21-2010, 11:25 PM

Originally posted by RBellavance

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.

aleonx3 · 12-21-2010, 11:36 PM

+1
12-35mm is a perfect range for street and landscape photography, although constant F4 would be super nice.

rustynail925 · 12-21-2010, 11:52 PM

im hoping the max aperture @24mm is f4.. and f4.5 @25-35mm

dankoBanana · 12-22-2010, 04:11 AM

Originally posted by rustynail925

im hoping the max aperture @24mm is f4.. and f4.5 @25-35mm

also ... it sounds plausible

12-20-2010, 01:12 PM	#46
Marcus Senior Member Join Date: Jan 2008 Location: NJ Posts: 187	Nice range The 12-24 is already expensive as stated, but this 12-35mm is weather resistant. BIG plus!

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12-20-2010, 01:15 PM	#47
Hypocorism Veteran Member Join Date: Sep 2010 Location: Melbourne .au Posts: 623	Originally posted by Mike.P® 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
Hypocorism Veteran Member Join Date: Sep 2010 Location: Melbourne .au Posts: 623	Originally posted by Marcus 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
glanglois Veteran Member Join Date: Aug 2007 Location: Madison, Wis., USA Posts: 1,506	Originally posted by stanic 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
RBellavance Veteran Member Join Date: Nov 2006 Location: Near Montréal, Canada Photos: Gallery Posts: 1,716	Originally posted by FullertonImages 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
stanic Veteran Member Join Date: Aug 2010 Location: Zakopane Photos: Gallery \| Albums Posts: 389	Originally posted by glanglois 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
Hypocorism Veteran Member Join Date: Sep 2010 Location: Melbourne .au Posts: 623	Originally posted by glanglois 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
thibs Pentaxian Join Date: Jun 2007 Location: Belgium Photos: Albums Posts: 7,001	AND Canon USM is both ring motor and plain usual motors, so ... Smells troll. 'Ignore' mode ON.

12-20-2010, 04:21 PM	#54
rparmar Site Supporter Join Date: Jan 2008 Photos: Gallery Posts: 8,819	Originally posted by Hypocorism 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
repaap Pentaxian Join Date: Oct 2010 Photos: Gallery \| Albums Posts: 6,242	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
sewebster Veteran Member Join Date: Jun 2008 Location: Vancouver, BC Photos: Gallery Posts: 544	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
FullertonImages Veteran Member Join Date: Apr 2009 Location: Boulder, CO Posts: 883	Originally posted by RBellavance 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
aleonx3 Veteran Member Join Date: Jul 2007 Location: Brampton, Ontario Photos: Gallery \| Albums Posts: 3,996	+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
rustynail925 Veteran Member Join Date: Aug 2009 Location: Philippines Photos: Gallery Posts: 1,551	im hoping the max aperture @24mm is f4.. and f4.5 @25-35mm

12-22-2010, 04:11 AM	#60
dankoBanana Inactive Account Join Date: Dec 2008 Location: Zagreb, Croatia Posts: 533	Originally posted by rustynail925 im hoping the max aperture @24mm is f4.. and f4.5 @25-35mm also ... it sounds plausible