The ABC of Photography – K
Kelvin (K) The unit used for measuring the colour temperature of light sources, named after the 19th-century physicist and engineer William Thomson, first Lord Kelvin (1824-1907). Average noon daylight usually…
The ABC of Photography – Histogram
A graph that provides an instant guide to the contrast and exposure of a picture. It maps the distribution of tones, from the darkest on the left to the brightest on…
The ABC of Photography – High-speed sync (HSS)
High-speed sync (HSS) Flash feature that allows the use of shutter speeds with flash, faster than the usual sync speed. The flash pulses at high frequency to ensure even exposure,…
The ABC of Photography – Healing Brush tool
Healing Brush tool A retouching tool that lays down copied pixels like the Clone Stamp tool, but in addition, it analyses nearby colour and tone and attempts to blend the…
The ABC of Photography – HDR (high dynamic range)
HDR (high dynamic range) A digital imaging technique where a series of identical pictures of a scene are taken at different exposures and then combined into one image. This brings…
The ABC of Photography – Hand tool
A tool for moving your image around when you’re zoomed in and can’t see all the images at once, by dragging on the image. Press the H key, or hold…
The ABC of Photography – Haloes
Haloes A term used to describe the glow that’s created around the edges of objects when they’ve been over-sharpened in Photoshop or other similar photo-editing software. They are even more…
The ABC of Photography – Diffuser
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.…
The ABC of Photography – Diffraction
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…
The ABC of Photography – Differential focusing
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…
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