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04-15-2014, 07:31 AM   #1
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FA 31mm Ltd. on K-3: Focal length disappears on LCD

This rookie has run into a new situation while testing a brand new FA 31mm Ltd. on Pentax K-3.

When the aperture ring is turned away from Auto (e.g. to f/5.6), the indication for aperture also disappears on LCD-screen and in the seeker. There is just the letter F and two lines - no numbers showing the chosen aperture.

I guess that's normal, as you're supposed to know what value you yourself just set the aperture to on the lens. But as I'm not sure (as there could be an indication showing what f-value you've chosen) I just air this question.

Does anybody know the situation?

Thank you.

Last edited by Ztrejfer; 04-15-2014 at 07:54 AM.
04-15-2014, 07:45 AM   #2
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I don't have a k-3, but I'm assuming it's the usual issue with manual aperture lenses and pentax cameras - you have to enable a setting to allow it to work outside of that Auto mode.
04-15-2014, 07:47 AM   #3
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Yes, this is normal when the aperture ring is off the "A" setting. The body can only display the aperture if it is controlling it. With the exception of the F-- display, this has been the behavior of Pentax cameras having program or Tv modes since the original A-series film cameras in the early 1980s.

You will get the same behavior when using vintage lenses that lack the "A" position on the aperture ring.

04-15-2014, 07:54 AM   #4
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Original Poster
OK, thank you very much both of you - I thought it would be something like that.

Have a nice day! :-)

Last edited by Ztrejfer; 04-15-2014 at 08:11 AM.

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