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Forum: Pentax SLR Lens Discussion
11-08-2019, 01:18 PM
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So glad this thread is still here. Just finished converting my 50-135 and 16-50 back to screwdrive. My 50-135 I had converted ages ago, but after it was involved in an accident (and repaired) the pentax repair shop had fixed the sdm and reprogrammed the lens back to SDM. But three years later, SDM started acting up this spring (was not responsive until after twisting the lens focus back and forth for a minute) and after a couple of months on the shelf when I went to use it again, it was dead (unresponsive).
Took longer to relearn how to get my old K20 back into debug mode, but once that was accomplished the conversion of both lenses took about 10 minutes.
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