Kodak DCS500 - Manual (Page 197)

10-8
When the mirror-up function is set, one image is exposed at a time, regardless of the Drive
mode (Single Exposure or Continuous Exposure).
If the Self-timer is used in combination with the mirror-up function, the mirror swings up
when the Shutter button is first pressed, then the Shutter releases automatically after a
delay of 10 seconds (in 10-second Self-timer mode) or 2 seconds (in 2-second Self-timer
mode).
When using the Bulb Exposure and Self-timer modes in combination with the mirror-up
function, a shutter release-type sound is heard when you remove your finger from the
Shutter button while the Self-timer is operating, but no image is actually captured.