Glossary
Aberration Defect in a lens resulting in less than optimum sharpness over part of the image plane. See Chromatic Aberration, Spherical Aberration.
Accessory shoe Fitting on a camera to allow devices such as flashguns to be clipped on. See Hot Shoe.
Accelerator Chemical ingredient of developer to speed up the otherwise slow activity of developing agents. Normally an alkali such as sodium carbonate, borax or (high contrast developers) sodium hydroxide. Also known as ‘activator’ or ‘alkali’ component.
Achromatic Lens system corrected to eliminate the effects of chromatic aberration.
Acid Chemical substances with pH below 7. Harmful to skin and eyes. Because acid neutralizes an alkali, acidic solutions are often used to halt development ...
Get Langford's Basic Photography, 9th 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.
