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05-06-2016, 11:18 PM   #1
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Pentax 645N, 75mm F2.8 Lens


I use Pentax 645n
Suddenly the autofocus is not working ?
I can hear the focus ring turning but it is not focusing
The manual function works well though

I had diopter adjusted, selected Single not servo ; AF at one dot ; AF not MF. Still not focusing :-(

What can be the possibilities ?


07-16-2016, 02:44 AM   #2
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Could be the AF drive shaft not engaging, or an internal gearing issue. Does it work with other lenses?

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