I am trying to take 180 x 25 second exposures (changed down from 30 second ones) with say a 2 second interval, either with the internal Interval Timer or an external one. How would the menu read? Thanks to the previous reply to my first question regarding the same problem. On the 30 second exposure, the camera fired a shot and the green light flashed every 30 seconds for one hour or 100 shots.
Select shutter speed required in manual or check approximate auto shutter speed. In the menu select interval timing (camera date & time must be set) - go for "now" option it's easier. Select the interval period - this MUST - be longer than the shutter time - set number of intervals required and choose 1 shot per interval (experiment later!) that should work