no thats the press the shutter and it waits 2/20 secs before taking the pic , to do time lapse( what you were talking about) you normally need to uses ateathered system, the canon one for example has a time plase system.
as for the remotes does anyone know if the cable release that fits the 450d has a lock?
as for the remotes does anyone know if the cable release that fits the 450d has a lock?







. I wish i had unlimited exposure
, 4 seconds really isn't enough. 
























