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Forum: Pentax SLR Lens Discussion 04-13-2014, 07:17 PM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Roob-N-Boots
Replies: 870
Views: 275,743
Those are the same rows I had edited but I didn't want to go through with out making sure. I'm also using a k100d. I'll give it a try. Thanks.

---------- Post added 04-13-14 at 08:16 PM ----------

Thanks guys! Just got done hacking both 16-50 and 50-135! So far they look like they focus dead on, on my K5II!
Forum: Pentax SLR Lens Discussion 04-12-2014, 07:07 PM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Roob-N-Boots
Replies: 870
Views: 275,743
Guys please help me hack my 16-50 and 50-135 lenses. The SDM never went out on either one, but I somehow managed to break an SDM contact off the mount of each one. I have tried the hack with a K7, my K5,Kx and my K-01 but I get "PC VENDOR' instead of full DEBUG MODE. So I bought a K100d off KEH because I read in earlier posts that it was easier to hack with that model.
I'm trying to hack the 16-50 first. I managed to get in full DEBUG MODE and I copied the lens EEPROM from K100D and started editing with Apple Text Editor within the SD Card (didn't download it to iMac but opened it with Text Edit) I managed to change the values from line "0000" to lines "04F0" from "C0" to "80" but I don't know if I should do the same for lines "5000" through "07F0". All the values in those lines say "FF".

Another thing I don't get is the quote posted below. Do i have to write additional values within the camera after I'm done with the steps above? Thank you guys in advance!
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