The ABC of Photography – JPEG (Joint Photographic Experts Group)
A file format used for digital images. A variable amount of compression can be used to vary the amount of detail stored and the resulting file size. It’s the standard…
The ABC of Photography – ISO
Stands for International Organisation for Standardisation. In photography, it refers to a system for measuring and specifying the sensitivity of digital imaging systems and photographic films. The higher the ISO…
The ABC of Photography – IS
The abbreviation used for Image Stabilization – the optical camera shake-reduction system found in a wide range of Canon lenses.
The ABC of Photography – Inverse square law
This law particularly relates to the use of studio lights or flash and says that if an object is twice a particular distance from a point source of light, it…
The ABC of Photography – Infrared photographs
mages recorded on an image sensor or photographic film that’s only sensitive to infrared (IR) light, beyond the spectrum visible to us. Black-and-white IR landscapes have a ‘dreamlike’ quality’; grass and…
The ABC of Photography – Infinity
Optical term to describe objects that are so far away from the lens that light from them reaches the lens as parallel rays. In practice, it’s usually used to mean…
The ABC of Photography – Image sensor
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…
The ABC of Photography – Image file format
A standard way of encoding information for storage in a computer file. File formats used in photography include JPEG, TIFF, PSD and GIF, all of which are suitable for particular uses.…
The ABC of Photography – Incident light meter
A hand-held light meter that measures the amount of light falling on a subject.