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Forum: Pentax SLR Lens Discussion 09-13-2015, 10:14 PM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Belcik
Replies: 870
Views: 275,869
Hello,

Nope, I did not specially noticed any focus misalignement problems. After converting to Screw Drive I did few shots to check if there is no Back/Front Focus issues. Within not bright artificial light condition I did not notice any serious focusing issues.
Forum: Pentax SLR Lens Discussion 09-13-2015, 05:34 AM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Belcik
Replies: 870
Views: 275,869
Interesting, so each one is unique for each single copy? This would mean thas some unique calibration data are stored?
Forum: Pentax SLR Lens Discussion 09-12-2015, 09:03 AM  
How to deactivate SDM and allow for screw drive autofocus with DA* 16-50mm f/2.8
Posted By Belcik
Replies: 870
Views: 275,869
Just did the trick on 50-135 and K200d.

If someone interested, I attached changed lens file. Remove .txt at the end
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