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I bought the Pentax K-S2. In first use with an SMC Pentax-FA 80-320 mm 1:4.5-5.6 lens, I wanted to use AF mode, but this not available in the camera menus. When I enter the menu, in AF settings, the active area AF isn’t available. And I can’t change MF to AF in the info settings. Could you give me a solution to this? Or tell me why it does not work?

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  • Is there AF/MF switch on the lens? It shhould be close to to the camera mount.
    – Crowley
    Jan 3, 2017 at 17:02
  • You may want to clean the lens contacts, if they aren't solid the camera won't know it's a AF lens.
    – Mark Ransom
    Jan 4, 2017 at 1:04

1 Answer 1

Reset to default
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The manual for the Pentax K-S2 shows the location of the focus mode switch on page 8 and describes its operation on page 54.

  1. Make sure the focus mode switch is set to autofocus.

  2. Make sure the lens is capable of autofocus. The SMC Pentax FA interchangable lens manual indicates that it is.

If there is a problem caused by malfunction then either the camera or the lens could be the source. Testing the lens with another camera and the camera with another lens should narrow it down in that case.

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