An integrated circuit chip that converts an optical image into an electronic signal. In current digital cameras, most are either CCD (charged coupled device) or CMOS (complementary metal-oxide-semiconductor) sensors. CCD…
A hand-held light meter that measures the amount of light falling on a subject.
Lange, Dorothea Dorothea Lange (1895-1965) was an American photojournalist and documentary photographer. Her most famous image was taken in the 1930s, when she recorded the plight of sharecroppers and migrant labourers…
The ABC of Photography - Diffuser Any material that scatters the light as it passes through it, Softening the illumination and making shadows less distinct. Diffusers are commonly used with artificial light sources.…
Diffraction Scattering of light caused by deflection at the edges of an opaque object. Diffraction causes slight fuzziness in the image when the narrowest apertures are used. Sources: Pixabay, NASA,Wikipedia, Susan Wingfield…
Differential focusing Controlling depth of field to ensure that one element in the picture is sharp, while others are as out of focus as possible. Sources: Pixabay, NASA,Wikipedia, Susan Wingfield…
Depth of field A measure of how much of a picture is in focus, from the nearest point in the scene to the camera that looks sharp, to the furthermost point that…
Dedicated flashgun A type of flashgun that’s designed to provide direct one-way or two-way communication with the camera. The amount of dedication varies enormously depending on the flashgun and camera. Increased dedication tends…
Decisive moment The split-second when all the elements of a photograph simultaneously come together. The decisive moment is associated with Cartier-Bresson, who described photography as “the simultaneous recognition, in a fraction of a second,…
DC This features on the range of Sigma lenses that are designed specifically for use with crop-factor SLRs, and which can’t be used with full-frame models. Sources: Pixabay, NASA,Wikipedia, Susan Wingfield Lamar…