Can someone help me out with this calculation:
Quite a journey for light to travel and as one would no doubt expects loss of light to the tune of 4 stops occurs.
a) Which meant? full stop or half stops?
b) if the aperture is at f5.6, after 4 stop loss of light? Which aperture is it?
c) Do I have to recalculate the shutter speed as well to compensate the loss of light?
Sorry for the inconvenience