ABSTRACT
The tonal range of the print is of course much greater than just ten tones. Breaking the tonal range into ten precise zones allows the photographer to visualise how a metered tone in the subject will translate into a tone on the printing paper. A selected tone can be moved up or down the scale one zone at a time simply by opening or closing the aperture one stop at a time. By placing a tone further up or down the scale the image is made darker or lighter as all other tones are moved in the same direction.
