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Forum: Pentax SLR Lens Discussion 07-30-2015, 03:30 AM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By sadsun73
Replies: 870
Views: 275,661
After several failed attempts, here is the method that worked on my camera K20 with firmware 1.04
- Installation PK_Tether 0.7.0
- From PK_Tether 0.7.0 Enabling Debug Mode
- Install Notepad ++ 6.3
Step 1: Create a text file called MODSET.442 in the root of your SD card. The file should contain the following single line:

[OPEN_DEBUG_MENU]

Make sure that the file is called MODSET.442 and not MODSET.442.txt(save as ** all files**)

Step 2: Put the SD card into the camera but leave the card door open.

Step 3: Hold down the Menu button and turn on the camera. Keep holding down the Menu button until the debug menu appear
-
-- Go to the page no.4 debug menu and execute
- lens rom dat to file
- Press the menu button to exit the debug menu
- copu lensleep.lns to safe place for backup
- Lenseep.lns file from sd card open in Notepad ++
- In the first 4 groups of numbers there 4x4 combinations of letters that should be changed from C0 to 80
- copu lensleep.lns back to the sd card
- Hold down the Menu button and turn on the camera. Keep holding down the Menu button until the debug menu appear
- lens rom dat to camera
- once you click "OK", the screen flash several message quickly
- once is blinking done hit the button menu to exit
- Create a text file called MODSET.442 in the root of your SD card. The file should contain the following single line:
[DEBUG_MENU DIS]
- pk TETHER in my case COULD NOT to turn off the debug mode, so I had to do USING SD CARDS AND
my happiness never ends,
FINALlY, AGAIN i can use F2.8 and weather-sealed body in the right combination

:):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D:D

p.s. I hope that this little guide will support someone else to revive the lens
p.s.s. Thanks Andy McMullan and LFLee

Andy McMullan
https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/208353-how-...ml#post3083922
Forum: Pentax SLR Lens Discussion 07-28-2015, 03:58 AM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By sadsun73
Replies: 870
Views: 275,661
Despair, sadness, unhappiness
Why, oh why, only my k20 with firmware 1:04 can not be further from the screen DEBUG
I tried all the variants in this post but nothing helps!
Please someone with little patience to send me instructions
which mod. for K20, which 0000number, or something else
P.S. I have installed Pk_tether and notepad +++
I really need that 16-50 is recovered in life, for my job, and life would be nicer
Thank you in advance for your time:):o:D
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