The SD10 digital SLR camera has mirror lock-up capability. This can be very useful to minimize image-degrading vibration, when using long lenses or longer shutter speeds. Once this function is turned on, the mirror can be locked-up by simply depressing the shutter release button fully. Pressing the button a second time fires the shutter and returns the mirror to the normal viewing position. The mirror also can be locked up, and then the shutter fired remotely, if the optional RS-21 remote controller is used. This sequence can be repeated indefinitely, until the function is turned off.