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01-25-2009, 12:54 PM   #1
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Location: Netherlands
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sdm converter

I own a pentax 300/4 sdm lens that (on the K10D) does not work with a 1.4 x sigma converter because of the missing contacts. But even the soligor 1.7 converter, that does have these contacts, does not work to. The sdm works, but it it can not focus properly. Does anybody know why that is?

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contacts, converter, k-mount, pentax lens, sdm, slr lens
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