| http://www.w3.org/ns/prov#value | - pbloom says: June 21, 2010 at 18:16 when shooting documentaries, events or anything other than narrative there are times when the light will change and you need to change the iris, hence you need a smooth way to do this. i don???t get your comment about changing the iris to get a dramatic change of DOF. would not be possible with changing the ISO/ shutter to maintain exposure.
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