The ABC of Photography – Joiner

A term coined by the artist David Hockney (born 1937) to describe his photo-collage work in the 1980s. Hockney’s joiners combined overlapping prints, made at slightly different times and from multiple viewpoints, to make landscapes and portraits. His most elaborate joiners used hundreds of individual prints to make one collage. Other photographers creating joiners (also called ‘panographs’) have followed Hockney’s method of assembling prints or have combined digital images on the screen using photo-stitching software.


 

The ABC of Photography – Jack

A socket into which a plug is inserted to make a connection, also known as a ‘female’ connector. A jack on a camera is used for connecting an accessory such as headphones or a remote shutter release. A 3.5mm mini-jack is used for connecting an external stereo

mic or to connect to old TVs.

Sources:  Pixabay, NASA,Wikipedia, Susan Wingfield Lamar High School


 

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 number, the greater the sensitivity to light.

Cameras have an ISO range, enabling you to choose an ISO setting that suits the situation in which you’re shooting.


 

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 will receive a quarter of the illumination. For example, if your subject is two meters away, and you increase it to four meters, the resulting fall-off means you’ll need four times the amount of light to keep the same exposure settings. Alternatively, you’ll have to increase the exposure by two stops.


 

The ABC of Photography – Instamatic

The name of a hugely popular series of low-cost, easy-to-use cameras made by Kodak. First sold in 1963, Instamatics used Kodak’s cartridge-based 126 film. In 1972, the company introduced the Pocket Instamatic, which used the smaller 110 film.


 

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 foliage are recorded as almost white, while blue skies become black. Digital cameras can be converted to only shoot IR images by removing the IR blocker in front of the sensor in the camera body and replacing it with a filter that instead blocks visible light.


 

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 objects that are on or near the horizon. Represented on lenses by the mathematical symbol, ∞.