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07-10-2009, 10:01 PM   #1
New Member

Join Date: Jun 2009
Location: hong kong
Posts: 5
does the autofocus of SDM lens works on istDL?

hi all,

After received my IR converted istDL, I put a DA17-70/f4 SDM lens for a test and found the autofocus doesn't work, but the f-stop / time still working perfectly. this is the ONLY lens among my 6 lens (DA, FA, F ) got the autofocus problem. The lens works perfectly on my K20D.

As I NEVER put the DA17-70/f4 SDM on the istDL before I send the cam out for conversion, I've got no idea what's wrong with it - the only thing i can think of is these two are not compatible.

anyone can confirm with me rather the autofocus of DA17-70/f4 SDM lens works ok on the istDL?


07-10-2009, 10:11 PM   #2
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Join Date: Feb 2008
Location: Toronto
Posts: 3,915
no it does not. the DA 17-70 and the DA* 55 require the electical contact to run the AF (KAF3 lens)
all the other DA* lenses are KAF2 lenses, which have both SDM motor and can be Screw Drive driven

you need a K10D or later camera to use it (K100D Super, K200D, K2000D, K20D, K-7)
07-10-2009, 10:18 PM   #3
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Join Date: Jun 2009
Location: hong kong
Posts: 5
Original Poster
thanks K100D

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