How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8

SimonJones65 · 02-04-2013, 06:36 PM

I have a K7 with a 17-70 SMC DA Lens - I can set the camera in Debug mode but I get different values in the LENSEEP.LNS file - does anyone know whether it is possible to disable SMC focusing for this lens?

builttospill · 02-04-2013, 08:05 PM

Originally posted by SimonJones65

I have a K7 with a 17-70 SMC DA Lens - I can set the camera in Debug mode but I get different values in the LENSEEP.LNS file - does anyone know whether it is possible to disable SMC focusing for this lens?

Yes, I disabled my SDM in my three-month-old DA 17-70 by using it as directed.

The 17-70 is SDM only, there is no screw drive focusing parts in this lens.

Phii Mii · 02-09-2013, 08:40 AM

Originally posted by builttospill

Yes, I disabled my SDM in my three-month-old DA 17-70 by using it as directed.

The 17-70 is SDM only, there is no screw drive focusing parts in this lens.

Sorry for me beeing rather new to this but why do you disable SDM if there's only SDM and no screw drive?

builttospill · 02-09-2013, 09:13 AM

It was by design, not by choice. Sorry for the confusion, but my comment was tongue-in-cheek. Your exact question was the point I was trying to make. My DA 17-70's SDM failed after only three months of use. The entire SDM system was replaced under warranty, but that one didn't last too much longer than the first one.

It's too bad because the 17-70 produces fantastic images. I liked this lens even more than my DA* 16-50.

teuflor · 02-14-2013, 02:04 AM

edit:

sorry was too stupid to read.

works well. thanks!

worked with K20d 1.03

You Tube

Salagubang · 02-14-2013, 02:27 AM

That looks like it is unedited version (original).

1. Save a copy of the original lensepp and save it somewhere on your computer so you'll have a backup.
2. Now upload a copy of the lensepp to any media hosting website i.e., mediafire then post the link here and I'll edit it for you (in text format) for you to compare (sort of cheatsheet).

sveinmb · 02-18-2013, 04:05 AM

Just have to say a big thank you to the guys behind this fix!

I'm stunned that someone actually managed to reverse the firmware and made it possible to disable SDM. My DA* 16-50, known from the pictures in the previous (temporary) repair thread, is now a last permanently fixed from the dreaded SDM failure.

BeerBelly · 02-26-2013, 12:07 AM

I'm just curious. Is there a way to do this using the K30? I mean...has anybody tried to access the debug menu needed with a K30?

aurele · 03-23-2013, 04:35 AM

i was wondering, after changing the code to focus with screwdrive instead of SDM, does the lens focus on film SLR that have screwdrive ?

clover · 03-28-2013, 08:43 AM

Probably. I will try as soon as possible;

aurele · 03-28-2013, 09:11 AM

Originally posted by clover

Probably. I will try as soon as possible;

thanks !

panoguy · 03-28-2013, 12:58 PM

Originally posted by aurele

i was wondering, after changing the code to focus with screwdrive instead of SDM, does the lens focus on film SLR that have screwdrive ?

Yes, it still does. Used my 16-50 on the Pz-1P with no problems after the disablement. I think all AF film cameras are like early Pentax DSLRs: they don't even know the SDM is there! (And my Pz didn't try to "power zoom" with those contacts either...)

aurele · 03-28-2013, 04:34 PM

Originally posted by panoguy

Yes, it still does. Used my 16-50 on the Pz-1P with no problems after the disablement. I think all AF film cameras are like early Pentax DSLRs: they don't even know the SDM is there! (And my Pz didn't try to "power zoom" with those contacts either...)

So cool ! i asked, because i'm planning to get a DA*300 this year but i'd like to be able to use AF on my film body

LB1103 · 03-31-2013, 03:31 PM

Has anyone figured out how to do this with a K-5iis? Or better yet is there anyone in the Phoenix, AZ metro area who has done this and is willing to do this for my lens? I really don't want to have to send it back to KEH, though that is probably what I will end up doing.

dielah · 04-10-2013, 09:59 AM

Awesome... my beauty of a 16-50 is ALiiiive (again) ^o^

Kudos to the TS and genius(s) behind this thread...

Will be sticking around to see more action with other lenses and / or bodies...

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02-04-2013, 06:36 PM	#121
SimonJones65 New Member Join Date: Feb 2013 Posts: 1	I have a K7 with a 17-70 SMC DA Lens - I can set the camera in Debug mode but I get different values in the LENSEEP.LNS file - does anyone know whether it is possible to disable SMC focusing for this lens?

02-04-2013, 08:05 PM	#122
builttospill Pentaxian Join Date: Jun 2009 Location: Utah, Idaho Photos: Gallery Posts: 2,398	Originally posted by SimonJones65 I have a K7 with a 17-70 SMC DA Lens - I can set the camera in Debug mode but I get different values in the LENSEEP.LNS file - does anyone know whether it is possible to disable SMC focusing for this lens? Yes, I disabled my SDM in my three-month-old DA 17-70 by using it as directed. The 17-70 is SDM only, there is no screw drive focusing parts in this lens.

02-09-2013, 08:40 AM	#123
Phii Mii Junior Member Join Date: Oct 2012 Posts: 27	Originally posted by builttospill Yes, I disabled my SDM in my three-month-old DA 17-70 by using it as directed. The 17-70 is SDM only, there is no screw drive focusing parts in this lens. Sorry for me beeing rather new to this but why do you disable SDM if there's only SDM and no screw drive?

02-09-2013, 09:13 AM	#124
builttospill Pentaxian Join Date: Jun 2009 Location: Utah, Idaho Photos: Gallery Posts: 2,398	It was by design, not by choice. Sorry for the confusion, but my comment was tongue-in-cheek. Your exact question was the point I was trying to make. My DA 17-70's SDM failed after only three months of use. The entire SDM system was replaced under warranty, but that one didn't last too much longer than the first one. It's too bad because the 17-70 produces fantastic images. I liked this lens even more than my DA* 16-50.

02-14-2013, 02:27 AM	#126
Salagubang Senior Member Join Date: Oct 2011 Location: San Jose Del Monte Photos: Gallery \| Albums Posts: 198	That looks like it is unedited version (original). 1. Save a copy of the original lensepp and save it somewhere on your computer so you'll have a backup. 2. Now upload a copy of the lensepp to any media hosting website i.e., mediafire then post the link here and I'll edit it for you (in text format) for you to compare (sort of cheatsheet).

02-18-2013, 04:05 AM	#127
sveinmb Senior Member Join Date: Sep 2008 Location: Norway Posts: 127	Just have to say a big thank you to the guys behind this fix! I'm stunned that someone actually managed to reverse the firmware and made it possible to disable SDM. My DA* 16-50, known from the pictures in the previous (temporary) repair thread, is now a last permanently fixed from the dreaded SDM failure.

02-26-2013, 12:07 AM	#128
BeerBelly Senior Member Join Date: Nov 2010 Posts: 139	I'm just curious. Is there a way to do this using the K30? I mean...has anybody tried to access the debug menu needed with a K30?

03-23-2013, 04:35 AM	#129
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	i was wondering, after changing the code to focus with screwdrive instead of SDM, does the lens focus on film SLR that have screwdrive ?

03-28-2013, 08:43 AM	#130
clover Senior Member Join Date: Oct 2009 Location: Near Paris Posts: 141 Original Poster	Probably. I will try as soon as possible;

03-28-2013, 09:11 AM	#131
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	Originally posted by clover Probably. I will try as soon as possible; thanks !

03-28-2013, 12:58 PM	#132
panoguy Pentaxian Join Date: Sep 2007 Location: Washington, D.C. Photos: Gallery \| Albums Posts: 3,327	Originally posted by aurele i was wondering, after changing the code to focus with screwdrive instead of SDM, does the lens focus on film SLR that have screwdrive ? Yes, it still does. Used my 16-50 on the Pz-1P with no problems after the disablement. I think all AF film cameras are like early Pentax DSLRs: they don't even know the SDM is there! (And my Pz didn't try to "power zoom" with those contacts either...)

03-28-2013, 04:34 PM	#133
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	Originally posted by panoguy Yes, it still does. Used my 16-50 on the Pz-1P with no problems after the disablement. I think all AF film cameras are like early Pentax DSLRs: they don't even know the SDM is there! (And my Pz didn't try to "power zoom" with those contacts either...) So cool ! i asked, because i'm planning to get a DA*300 this year but i'd like to be able to use AF on my film body

03-31-2013, 03:31 PM	#134
LB1103 Junior Member Join Date: Feb 2013 Photos: Albums Posts: 37	Has anyone figured out how to do this with a K-5iis? Or better yet is there anyone in the Phoenix, AZ metro area who has done this and is willing to do this for my lens? I really don't want to have to send it back to KEH, though that is probably what I will end up doing.

04-10-2013, 09:59 AM	#135
dielah New Member Join Date: Aug 2010 Posts: 1	Awesome... my beauty of a 16-50 is ALiiiive (again) ^o^ Kudos to the TS and genius(s) behind this thread... Will be sticking around to see more action with other lenses and / or bodies...