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Forum: Pentax SLR Lens Discussion 11-11-2015, 06:08 AM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Dean Bradshaw
Replies: 870
Views: 275,811
Just following up on the help provided by daacon, and many others, in this thread.

I have managed to get my K20 with firmware 1.04 into debug mode and after that the process was really pretty straight forward.

Where I had gone wrong was holding menu while switching on camera with memory card door closed. This allowed me to access a limited debug menu within the main/normal camera menu...but no option to save the lens ROM.

After making the MODSET file as per instructions listed here, with card door open, hold menu and turn on camera...full debug menu, easy to save and load the lens ROMs and I have now converted both a 16-50 and a 50-135. I'll play around with them over the next few days to see what I think...but now know it is easy to switch back if I decide too.

Anyway...all good and thanks again.
Dean
Forum: Pentax SLR Lens Discussion 11-06-2015, 02:51 PM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Dean Bradshaw
Replies: 870
Views: 275,811
Thanks daacon for the detailed reply.
I'm away for the weekend, so won't have a chance to play around with this until middle of next week. I'll see how I get on and report back successes...or ask for more help :)
Cheers
Dean
Forum: Pentax SLR Lens Discussion 11-03-2015, 09:09 AM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Dean Bradshaw
Replies: 870
Views: 275,811
Hi daacon

Any chance you could explain how you downloaded and uploaded the lens eeprom using the K20D with firmware 1.04?
I've been doing a bit of googling, but not having much luck.
I have been able to set the K20D to debug mode, but I'm not able to bring up an actual debug menu that includes the option to download the lens eeprom.
Any help greatly appreciated.
Cheers
Dean
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