| http://www.w3.org/ns/prov#value | - Each has a range of Exposure Values to select from.The App then calculates what the effective EV value is (given the ISO rating) and so can calculate what the actual shutter speed should be.Depending on the ISO rating being used the Exposure value selected from the list can be increased or decreased e.g. if the light is low and the EV is -3 but you are using ISO 800 then the effective Exposure val
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