| Well, I've cleaned the lens and mount contacts (with a microfiber cloth), re-downloaded and re-ran the firmware update but the problem is unchanged. I've contact Pentax support but not heard back yet.
However, I've now discovered something even more bizarr. When I switch on live view with the 16-50mm lens attached shake reduction now kicks into overdrive. It sounds just like the mirror cleaning phase at start-up, loud clunking, but it is continuous. I can see the live view image bouncing all over the place. Turning the shake reduction off with the switch on the back makes no difference. It still does the shake reduction overdrive. Turning the lens and body to MF also makes no difference.
However, if I attach an older MF-only lens everything works fine. Live view is normal. Unfortunately, I don't have any other SDM lenses to test this on.
Maybe it is indeed something to do with one of the contacts. Any tips for cleaning them more throughly? |