I converted a Pentax 50-135mm SDM to screw drive.

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brandrx Forum Pro • Posts: 28,337
I converted a Pentax 50-135mm SDM to screw drive.
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Hi folks,

I already have a good Pentax 50-135mm f/2.8 SDM lens.

A few months ago I bought a bad one from ebay for about US $250 with the intention of converting it to screw drive. However, I could never make any sense out of all of the explanations of doing the conversion...until now.

How TO Convert SDM to Screw Drive

I had to try it about 5 times because I was reading one little thing wrong. It was easy after I finally figured out what I was reading wrong.

I used my K-5 to do the conversion. Now it works in screw drive on any of my cameras.

I have a Pentax 16-50mm f/2.8 that takes a while to warm up. I might end up converting this one also.

Cheers.

Ron

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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

Pentax K-5
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