Exposure Desk

Work out what every setup on a shoot actually exposes at, in stops. Exposure is one quantity in four currencies - aperture, shutter, sensitivity and filter - and they trade exactly, so a look is not chosen but paid for. Counts the frame rate as the exposure decision it is (120 fps is 2.3 stops darker than 24 at the same angle, every time), reads all three incompatible neutral-density scales and says which one it read, prices the three ways to pay a shortfall and says when the shutter runs out, and checks the shutter against the mains only where mains lighting is doing the work. Five lanes plan, check, shutter, filter and deliver. The engine is free and runs in the browser.

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