13
Controls for Exposure and Creating Images
EXPOSURE CONTROLS
The amount of light that reaches the film or digital sensor—and therefore the exposure—is determined by the aperture and the shutter speed. The maximum aperture of a lens is frequently referred to as the “speed” of the lens, and large aperture lenses are known as “fast” lenses. The aperture is determined by the size of the diaphragm opening, with a low number, such as f 2.8, indicating a larger opening. You reduce the amount of light reaching the image plane by setting the aperture to a higher number, such as f/11. A change in aperture from one setting to the next either doubles or halves the amount of light reaching the image plane.
Because aperture and shutter speed together determine ...
Get The Hasselblad Manual, 6th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
