Hi there, I just come across with bulb mode for long exposure photography. Normally I do a exposure with 15sec only (cuz that what my current camera allow me to do – fuji S5200 is without bulb mode).
I know is stupid to ask how to calculating the shutter time require fro bulb mode, where my camera dun even have the bulb mode function.
But anyway, here goes…
when aperture f-number = Require Shutter Time
2.8 =15 sec
4 =30 sec
4.6 =60 sec @ 1 min
8 =120 sec @ 2 min
11 =240 sec @ 4 min
16 =480 sec @ 8 min
If the correct exposure is f 2.8 at 15 sec.
then the other “on-going estimation” are calculate like this??
thank in advance