Attempt to simplify SDM to Screw Drive Conversion.

Started May 28, 2016 | Discussions thread
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brandrx Forum Pro • Posts: 28,337
Attempt to simplify SDM to Screw Drive Conversion.
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Hi folks,,

This is an attempt to simplify converting from SDM to Screw Drive.

Please take note that conversion of the Pentax DA*60-250mm f/4 SDM lens does not work. All other lenses I tried does work. The ones I tried were the DA*16-50mm f/2.8 SDM, DA*50-135mm f/2.8 SDM, DA*200mm f/2.8 SDM, and DA*300mm f/4 SDM.

The following is through the courtesy of forum member Blacknight659 at Pentax Forums.

NOTE: I am not responsible for any damage that may occur to your equipment. Continue at your own risk.

Stuff you need:

A Pentax camera that has the SDM lens attached that you want to convert to screw drive.

Dropbox- Pentax Hack Files: https://www.dropbox.com/sh/k464hmts3b9yk98/AAB-TIg_f-HfSowrT7096_YMa/enable%20Debug%20Menu?dl=0 Note: This is where you get two files according to the camera you are using to make the changes to the SDM lens you are attempting to modify.

Pktether: Here is a link to the most recent version on my Google Drive: https://drive.google.com/open?id=0B2uv9RXId6z4eUE2OTZmVTMybFk

Nopad++ (text editor): https://notepad-plus-plus.org/download/v6.9.2.html

My Steps - Follow these exactly.
1.) Download PKTether (pktether site)
2.) Download Camera Hack files (drop box)
3.) Download Notepad++
4.) Open Pktether
5.) Place SD card into camera, connect camera to computer (USB cable)
6.) Turn on Camera. In PKtether activate DEBUG MODE
7.) Copy Hack Files to the camera SD card
8.) Disconnect camera from USB cable
9.) Power Down Camera, Power back on
You are in Development Menu
10.) Scroll down to "Lens Rom Camera=SD" and hit OK. (it should go black, and then you will see the same screen again)
11.) Power off camera, Move SD card to PC and open it
12.) You are looking for the LENSEEP.LNS file. MAKE A BACKUP of this file - THIS IS LENS COPY SPECIFIC - ONLY YOUR FILE WORKS WITH YOUR LENS!
13.) Open LENSEEP.LNS with Notepad++
14.) Replace ALL instances of "C0" in column "03" with "80". DO NOT REPLACE any instances of "C0" outside of column "03".
15.) Move the new LENSEEP.LNS file to your SD card (replacing the orginal, remember to back up the orginal)
16.) Remove the SD card from the computer and put back in the camera. Power Camera on
17.) Scroll to "LENS ROM DAT SD= CAMERA" and hit OK ( you will see "Wait..." and then some text). Note: A couple of times I got an error so I just pressed OK a second time
18.) When Complete, lens should be in screw Drive
19.) Disable Debug Mode. Note: Press the Menu button then press it a second time.
A.) Use camera settings Menu Button Scroll left until you see "Test Mode" Disable Debug Mode Hit OK
B.) Connect to PKtether, Click Debug Mode Off

I sure hope this is more simple than what I went through in my other thread.

Cheers.

Ron

-- hide signature --

Ron - 'We don't have time to go take pics this afternoon Carl.'
Carl - 'What do you mean? It will only take 1/1000s.'
'Keep your eyes looking forward. However, glance back now and then to see where you've come from. It will put a smile on your face.' ~ brandrx

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