The flat dome, aka "Lumidisc" or incident disk, is used for metering of flat surfaces e.g. copywork, or where walls or floors are the important subject matter. It's possible to read the light incident on THAT particular plane, rather than all of the planes in a scene. Using an incident dome in copy photography gives a reading about a half stop out (but I've forgotten whether it produces over or under exposure).
Incident domes are for metering 3 dimensional subject matter with respect to the camera's viewpoint (by reading from subject position BACK TOWARDS the camera). regards, Anthony Farr ----- Original Message ----- From: "zcaballero" <[EMAIL PROTECTED]> > How do the flater dome affect readings? More or lesss accurate than > bigger, rounded dome? Have you compared readings? > Z >
