Pentax SDM II?

LeDave · 02-11-2010, 02:14 PM

Patent US20090323208

GoremanX · 02-11-2010, 02:53 PM

ooh, that would be much more promising than a micro motor

narichey81 · 02-11-2010, 02:57 PM

I doubt they will call this SDM anything, because A) Its using magnets not ultrasonic waves to move the ring, and B) SDM has alot of bad vibes with all the failures and such, so this would be a good opportunity to break with that nomenclature and start over. Looks good to me, though might be somewhat more audible than ultrasonics, but nowhere near as noisy as having to run a motor, reduction gear, and driveshaft, with more torque and less voltage required.

i83N · 02-11-2010, 03:36 PM

Maybe it's some kind of new power zoom?

-Linus- · 02-11-2010, 03:58 PM

Not at all,
simply to replace the the standard DC-Motor in camera with a more powerfull one with a smaller, more robust, gear. It is to reduce the size, by not using SDM, of the bigger (MF ?) lenses (or leave them the way they are). SDM has to hassle with high voltage isolation problems and low torque.

-Linus-

lithos · 02-11-2010, 04:21 PM

Fewer moving parts, too, which should make for a more reliable system.

GoremanX · 02-11-2010, 04:23 PM

Of course, it's all conjecture. For all we know, Hoya plans to use this in their Tokina line and leave Pentax with SDM. Or they don't intend to use it at all. Or they intend to sell it someone else.

Kunzite · 02-11-2010, 04:29 PM

Tokina is a separate company, they would register patents under their own name.

GoremanX · 02-11-2010, 04:32 PM

Originally posted by Kunzite

Tokina is a separate company, they would register patents under their own name.

oops, right, they just provide all the glass elements to Tokina

jeffkrol · 02-11-2010, 05:56 PM

It has both the ring magnet AF and a shaft drive for in body AF motor...
So they are still going to be doing dual action lenses??
Cool..
Of course you can ask "What's with Pentax not using ring USM???

Blue · 02-11-2010, 06:26 PM

They may have just filed it to screw with people.

If they did, its working!

Pentaxor · 02-11-2010, 06:49 PM

it appears to be working on me, but I'm more than happy using my primes right now. and they can go way faster than f2.8. although I would consider getting one for those occasions that I only have to use one lens. who knows, I might be a willing guinea pig.

LeDave · 02-11-2010, 07:14 PM

Originally posted by Blue

They may have just filed it to screw with people.

If they did, its working!

Just got to hope Pentax releases a firmware for SDM if they will ever release this new AF system or not. Wouldn't want Pentax to discontinue their support for current SDM lenses leaving future failed SDM's a MF brick.

gazonk · 02-12-2010, 02:12 AM

Maybe we'll know more about this in 4 weeks...? (wouldn't surprise me if this is seen in the new 645 lenses first.)

philbaum · 02-12-2010, 03:09 AM

There's an interesting paragraph 0005, i believe, where it mentions that DC and ultrasonic motors have difficulty generating enough torque without high voltage and/or extra gearing.

Perhaps its a lesson learned from the SDM

The good news is that they now have a plan for getting out of this mudhole.

02-11-2010, 02:14 PM	#1
LeDave Veteran Member Join Date: Jun 2009 Location: Minneapolis - St. Paul Photos: Gallery Posts: 3,067	Pentax SDM II? Patent US20090323208

02-11-2010, 02:57 PM	#3
narichey81 Forum Member Join Date: Jul 2009 Location: Vancouver, WA Posts: 58	not sdm I doubt they will call this SDM anything, because A) Its using magnets not ultrasonic waves to move the ring, and B) SDM has alot of bad vibes with all the failures and such, so this would be a good opportunity to break with that nomenclature and start over. Looks good to me, though might be somewhat more audible than ultrasonics, but nowhere near as noisy as having to run a motor, reduction gear, and driveshaft, with more torque and less voltage required.

02-11-2010, 05:56 PM	#10
jeffkrol Veteran Member Join Date: Sep 2006 Location: Wisconsin USA Photos: Gallery Posts: 8,434	Did I read it right. It has both the ring magnet AF and a shaft drive for in body AF motor... So they are still going to be doing dual action lenses?? Cool.. Of course you can ask "What's with Pentax not using ring USM???

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02-11-2010, 02:53 PM	#2
GoremanX Veteran Member Join Date: Dec 2009 Location: Georgia, VT Photos: Albums Posts: 1,657	ooh, that would be much more promising than a micro motor

02-11-2010, 03:36 PM	#4
i83N Veteran Member Join Date: Mar 2009 Location: Lithuania Photos: Gallery Posts: 1,203	Maybe it's some kind of new power zoom?

02-11-2010, 03:58 PM	#5
-Linus- Senior Member Join Date: Dec 2009 Location: Münsterland Posts: 139	Not at all, simply to replace the the standard DC-Motor in camera with a more powerfull one with a smaller, more robust, gear. It is to reduce the size, by not using SDM, of the bigger (MF ?) lenses (or leave them the way they are). SDM has to hassle with high voltage isolation problems and low torque. -Linus-

02-11-2010, 04:21 PM	#6
lithos Inactive Account Join Date: Oct 2007 Location: Brisbane, QLD, AUS Posts: 3,261	Fewer moving parts, too, which should make for a more reliable system.

02-11-2010, 04:23 PM	#7
GoremanX Veteran Member Join Date: Dec 2009 Location: Georgia, VT Photos: Albums Posts: 1,657	Of course, it's all conjecture. For all we know, Hoya plans to use this in their Tokina line and leave Pentax with SDM. Or they don't intend to use it at all. Or they intend to sell it someone else.

02-11-2010, 04:29 PM	#8
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Tokina is a separate company, they would register patents under their own name.

02-11-2010, 04:32 PM	#9
GoremanX Veteran Member Join Date: Dec 2009 Location: Georgia, VT Photos: Albums Posts: 1,657	Originally posted by Kunzite Tokina is a separate company, they would register patents under their own name. oops, right, they just provide all the glass elements to Tokina

02-11-2010, 06:26 PM	#11
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,377	They may have just filed it to screw with people. If they did, its working!

02-11-2010, 06:49 PM	#12
Pentaxor Veteran Member Join Date: May 2009 Location: Vancouver, B.C. Photos: Gallery Posts: 6,513	it appears to be working on me, but I'm more than happy using my primes right now. and they can go way faster than f2.8. although I would consider getting one for those occasions that I only have to use one lens. who knows, I might be a willing guinea pig.

02-11-2010, 07:14 PM	#13
LeDave Veteran Member Join Date: Jun 2009 Location: Minneapolis - St. Paul Photos: Gallery Posts: 3,067 Original Poster	Originally posted by Blue They may have just filed it to screw with people. If they did, its working! Just got to hope Pentax releases a firmware for SDM if they will ever release this new AF system or not. Wouldn't want Pentax to discontinue their support for current SDM lenses leaving future failed SDM's a MF brick.

02-12-2010, 02:12 AM	#14
gazonk Pentaxian Join Date: Feb 2009 Location: Oslo area, Norway Photos: Gallery \| Albums Posts: 3,746	Maybe we'll know more about this in 4 weeks...? (wouldn't surprise me if this is seen in the new 645 lenses first.)

02-12-2010, 03:09 AM	#15
philbaum Veteran Member Join Date: Oct 2007 Location: Port Townsend, Washington State, USA Posts: 3,659	There's an interesting paragraph 0005, i believe, where it mentions that DC and ultrasonic motors have difficulty generating enough torque without high voltage and/or extra gearing. Perhaps its a lesson learned from the SDM The good news is that they now have a plan for getting out of this mudhole.