Originally posted by Ash What the IR remote can't do is lock the shutter release down in Bulb mode, which is one of the most important uses of the cabled shutter releases for long exposures. So I have both, used in different applications.
In the K-x manual, it has a mode under the Custom menu 'Remote Control Shooting in Bulb Mode'.
The options are:
"Mode 1: Push remote control release button once to start exposure and a second time to end."
"Mode 2: Push and hold remote control release button for exposure. Release button to end".
That is to say, Mode 1 locks the shutter open in Bulb mode for long exposures, just like the cable release method. Press once to open shutter. Go away and read a book. Come back, press remote button again, shutter closes.
I think the K7 has the same option.