Originally posted by stevebrot Cool! So it might be something related to the lens. Part of start-up on K-3, KP and K-1 is to home the stepping motor of the aperture mechanism. The sound made while doing that is pretty subtle and not like what you recorded. What is the view through the viewfinder like if it does this with the 18-135 mounted and lens cap off?
Steve
Steve, I suspect what is happening is something internal with the body and not lens related. I get the same sound with a screw drive mounted, a 55-300 PLM which is KaF4 and no lens mounted at all. With the PLM mounted the focusing element seems to move slightly but with the screw drive DA 35 Ltd it doesn't.
For those concerned about strange noises I think it is a normal startup sound of this particular camera body.
Larry