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

Jonathan Mac · 12-24-2012, 03:13 AM

I have no SDM lenses but this is very interesting. Can someone who's performed the procedure confirm if it works?

leeak · 12-25-2012, 04:00 AM

Anyone else got this to work?

clover · 12-26-2012, 10:56 AM

Originally posted by HSV

OMG!

Somebody with a K10d or k-7 should set up a business to convert SDM's to screw drives!

I may do it, but it is no easy from France...

clover · 12-26-2012, 10:57 AM

Originally posted by leeak

This is so useful. Thank you for your contribution. There will be a larger respnse if this is posted in the lens discussion forum. I do have a question though. What do you mean by "change c0 by 80 in the colonn 03?"

You need to use notepad+ to view the .lens file as line and colunn

clover · 12-26-2012, 11:00 AM - **1 Like**

Originally posted by leeak

Anyone else got this to work?

I hope you do not ask me to make a youtube video to prouve it ..?

^-^

Anyway, I do not achieve to find yet, the code for my 60-250mm, and I am still waiting for one of my friend to let me try with his 50-135mm.
I will try later with a 200mm DA or a 300mm DA

alanebs · 12-26-2012, 11:49 PM

eagerly waiting for codes to disable sdm in 50-135... thank you for sharing! or is the code for 16-50 same as the codes for 50-135?

alanebs · 12-27-2012, 12:23 AM

already tried it on my dead 50-135 and it works! thank you so much!

Alizarine · 12-27-2012, 12:28 AM

I hope admins put this on sticky

It works...

as long as you follow all instructions carefully I think

Salagubang · 12-27-2012, 12:37 AM

Seconded. Its a relief that we now have an option to fix our broken SDM lenses.

Alizarine · 12-27-2012, 01:11 AM

I thought long and hard if this could be done... now it is. Thanks to whoever did this contribution it is SO VERY HELPFUL!!

frank · 12-27-2012, 01:13 AM

Looks like prices for second hand dual-driven SDM lenses are gonna go up a bit now

Salagubang · 12-27-2012, 01:15 AM

Originally posted by frank

Looks like prices for second hand dual-driven SDM lenses are gonna go up a bit now

Best to grab one now while most are still unaware. :P

aurele · 12-27-2012, 03:09 AM

Originally posted by Salagubang

Best to grab one now while most are still unaware. :P

exactly what i think !

We should ask the tech guy to see if you can adjust front/back focus by the same method ?

Shinwar · 12-27-2012, 08:40 AM

That's Amazing

Shinwar · 12-27-2012, 10:36 AM

But how can it works on K-5?
We cannot enter a full development menu through PKTether

12-27-2012, 12:37 AM	#24
Salagubang Senior Member Join Date: Oct 2011 Location: San Jose Del Monte Photos: Gallery \| Albums Posts: 198	Seconded. Its a relief that we now have an option to fix our broken SDM lenses. Last edited by Salagubang; 12-27-2012 at 12:57 AM.

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12-24-2012, 03:13 AM	#16
Jonathan Mac Pentaxian Join Date: Apr 2009 Location: Madrid, Spain Posts: 10,894	I have no SDM lenses but this is very interesting. Can someone who's performed the procedure confirm if it works?

12-25-2012, 04:00 AM	#17
leeak Senior Member Join Date: Sep 2007 Location: Seattle Posts: 245	Anyone else got this to work?

12-26-2012, 10:56 AM	#18
clover Senior Member Join Date: Oct 2009 Location: Near Paris Posts: 141 Original Poster	Originally posted by HSV OMG! Somebody with a K10d or k-7 should set up a business to convert SDM's to screw drives! I may do it, but it is no easy from France...

12-26-2012, 10:57 AM	#19
clover Senior Member Join Date: Oct 2009 Location: Near Paris Posts: 141 Original Poster	Originally posted by leeak This is so useful. Thank you for your contribution. There will be a larger respnse if this is posted in the lens discussion forum. I do have a question though. What do you mean by "change c0 by 80 in the colonn 03?" You need to use notepad+ to view the .lens file as line and colunn

12-26-2012, 11:00 AM - 1 Like	#20
clover Senior Member Join Date: Oct 2009 Location: Near Paris Posts: 141 Original Poster	Originally posted by leeak Anyone else got this to work? I hope you do not ask me to make a youtube video to prouve it ..? ^-^ Anyway, I do not achieve to find yet, the code for my 60-250mm, and I am still waiting for one of my friend to let me try with his 50-135mm. I will try later with a 200mm DA or a 300mm DA

12-26-2012, 11:49 PM	#21
alanebs New Member Join Date: Mar 2009 Location: manila, philippines Posts: 9	eagerly waiting for codes to disable sdm in 50-135... thank you for sharing! or is the code for 16-50 same as the codes for 50-135?

12-27-2012, 12:23 AM	#22
alanebs New Member Join Date: Mar 2009 Location: manila, philippines Posts: 9	already tried it on my dead 50-135 and it works! thank you so much!

12-27-2012, 12:28 AM	#23
Alizarine Veteran Member Join Date: Dec 2010 Location: Manila Photos: Gallery \| Albums Posts: 2,185	I hope admins put this on sticky It works... as long as you follow all instructions carefully I think

12-27-2012, 01:11 AM	#25
Alizarine Veteran Member Join Date: Dec 2010 Location: Manila Photos: Gallery \| Albums Posts: 2,185	I thought long and hard if this could be done... now it is. Thanks to whoever did this contribution it is SO VERY HELPFUL!!

12-27-2012, 01:13 AM	#26
frank Veteran Member Join Date: Nov 2006 Location: Singapore Photos: Gallery Posts: 3,202	Looks like prices for second hand dual-driven SDM lenses are gonna go up a bit now

12-27-2012, 01:15 AM	#27
Salagubang Senior Member Join Date: Oct 2011 Location: San Jose Del Monte Photos: Gallery \| Albums Posts: 198	Originally posted by frank Looks like prices for second hand dual-driven SDM lenses are gonna go up a bit now Best to grab one now while most are still unaware. :P

12-27-2012, 03:09 AM	#28
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	Originally posted by Salagubang Best to grab one now while most are still unaware. :P exactly what i think ! We should ask the tech guy to see if you can adjust front/back focus by the same method ?

12-27-2012, 08:40 AM	#29
Shinwar New Member Join Date: Dec 2012 Posts: 4	That's Amazing

12-27-2012, 10:36 AM	#30
Shinwar New Member Join Date: Dec 2012 Posts: 4	But how can it works on K-5? We cannot enter a full development menu through PKTether