Long-exposure manual (M*) mode to make selected shutter speeds match actually controlled duration.
With ordinary M mode of other models, one shutter-speed step equals 1 EV and the selected shutter speeds described with simple exposure-time figures do not always match the actually controlled duration (see the table below). With the Long-exposure manual (M*) mode,
the selected shutter speed equals actually controlled duration. For example, when you are taking 120 shots of 30-sec exposure time continuously for conducting “lighten composite,” the actually controlled duration will be as follows:
M: 32 sec. x 120 frames = 3,840 seconds (1 hour 4 minutes)
M*: 30 sec. x 120 frames = 3,600 seconds (1 hour)
Selectable shutter speeds and actually controlled durations at M and M* modes
Selected shutter speeds (sec.)
Actually controlled duration (sec.)
[at M mode]
Actually controlled duration (sec.)
[at M* mode]
- 4
- 8
- 15
- 30
Third-party software is used to perform lighten composite.
Shooting an unlimited number of frames for reproducing smoothly connected light trails in lighten composite
When using CH or CL release mode with a shutter speed 4 sec. or slower, the duration of continuous shooting can be unlimitedly extended as long as memory card capacity and battery status permit, in any image quality mode.
Different from interval-timer photography, which requires the interval duration of 1 sec. more than the exposure time, the duration between shots can be extremely short so that the light trails appear smoothly connected when conducting "lighten composite".
