"Thank you for contacting RICOH.
Your description is correct. This is how A-series lenses currently work in Program mode with our DSLRs (including the K-7, K-5, K-5 II etc.) Similar behavior will occur in Program Line Shallow (in which case the camera will "lock" on a large aperture). The lenses will operate more in accordance with how FA, DA and D FA lenses follow the selected Program Line when Auto and Normal Program Line is selected.
Product engineering and design decisions themselves come out of our parent company, RICOH Corporation, in Japan. Your suggestion has been submitted to the product developers as a product improvement/enhancement request. RICOH always appreciates hearing from the consumer public regarding the use of RICOH products, or regarding suggestions for new products or improvements in any area. We appreciate you taking your time to express your thoughts."
---------- Post added 05-22-14 at 01:30 PM ----------
Originally posted by Fogel70 I'm away from my Pentax cameras so I can't try anything. But I Have had strange behavior on them from time to time. Usually it's a combination of settings with a specific hardware that creates the behavior.
Sometimes a reset to factory default can help.
It would seem that the workaround is to use Av mode or aperture hyper-P in preference to a different program line if deep DOF is needed and a mix of non-AF glass is in the mix.
Steve