Ok there's something that I need to clarify 'cause I've been confused about this for a long time.
Does light stack? To illustrate my question, if I were to have a subject lit by strong sunlight from the right and I were to fire a flash straight on(exposing correctly in M mode for the sun-lit side, metering for flash on the unlit side, perhaps dialling in FEC of -2/3 stop), would this result in the light output from the flash adding to the light output from the sun and really blowing the right side of the subject or would I get a nice fill that's 2/3 stops under? So far I've only tried fill flash with backlighting and I cannot predict how it will turn out because I haven't grasped the above concept. Does light work like sound at all?
What is necessary to take note of when shooting with combined lighting?
Does light stack? To illustrate my question, if I were to have a subject lit by strong sunlight from the right and I were to fire a flash straight on(exposing correctly in M mode for the sun-lit side, metering for flash on the unlit side, perhaps dialling in FEC of -2/3 stop), would this result in the light output from the flash adding to the light output from the sun and really blowing the right side of the subject or would I get a nice fill that's 2/3 stops under? So far I've only tried fill flash with backlighting and I cannot predict how it will turn out because I haven't grasped the above concept. Does light work like sound at all?
What is necessary to take note of when shooting with combined lighting?