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Glossary

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A cable that screws into the camera (on film camera bodies usually into the shutter release, on digital bodies elsewhere) so the shutter can be fired remotely with minimal shake. Some have a lock so that the shutter can be held open on the B setting.
An area of internal memory that temporarily holds reusable data to ensure a faster access time. Large programmes, such as PhotoShop, require quite a bit of cache, otherwise they get very slow.
This type of photography focuses not so much on planning and careful setup, instead it concentrates on showing spontaneity: a candid photographer prefers not to plan his pictures and captures people without having them pose. He likes to be unobtrusive in order to achieve this. This, of course, contrasts with other types of photography where the photographer carefully stages or composes his images, like in portrait, landscape or still life photography. A candid photographer captures moments in time from life as it really is. Also see street photography, documentary photography.
Unit for storing and releasing a pulse of electricity. Used in flashguns to hold the charge.
An overall bias of the image towards one colour.
A lens that uses reflected and refracting surfaces to form an image. More commonly known as a mirror lens.
The tube used to project an electronic image to the computer monitor screen.
A charge-coupled device or image sensor. It consists of an integrated circuit with an array of linked ("coupled") capacitors which are sensitive to light. In digital photography, the CCD is used to capture images, which in analogue photography would be captured on film. CCD technology is not only used in digital photography, but also in astronomy and other branches of science.
A single, light-sensitive area on a CCD that records unique image detail. This is also referred to as a photosite.
The total number of pixels on a CCD array. This is not always the best indication of a camera's resolution as some CCD chips have a number of pixels around the that are only used to ensure the pixels that are used produce accurate colours. The true indication of a camera's resolution is the two figures quoted, say 1600x1200, which indicate the CCD's actual output. "A ... MP camera" is used to describe a model that has a CCD with a certain number times million pixels, which says something about how big the images are that it can create.
This is an indication of the speed that a device can find and display data from a CD. Most modern computers now come with high speed CD or DVD drives.
This is the speed that a device can write data using a CD-RW. A CD is about 74 minutes long so a 2x speed would record a CD in a half of that time.
Here is an indication of the speed that a device can write data using a CD-R. A CD is about 74 minutes long so a 4x speed would record a CD in a quarter of that time.
A CD that can be used only once to write data on using a CD-Writer.
This looks just like an audio CD and is used to carry up to 740MB of computer data, including images and software.
A CD that can be re-used to write data on using a CD-Rewriter.
Battery-powered light sensor cell that was widely used in old hand held exposure meters.
A common tripod feature that provides extra height without making the model much larger to carry. As this is a single column it can make the camera support unstable with increased vibration noticeable. Try to avoid using this where possible and always increase the leg length to gain height first before resorting to the centre column. Centre columns that have a crank handle and a geared control or those with pneumatic-dampening make it easier for you to accurately control the height adjustment.
A meter reading pattern that biases the measurement towards the centre of the frame.
One of the earliest forms of camera meter that takes a reading from most of the image area, but biases the measurement towards the lower central portion of the image. In landscape photography its a good idea to point the camera down slightly and take a reading without any sky in the view to ensure more accurate results.
A graph used to show a film emulsion or developer's limits of tonal reproduction, relative speed and fog level.
A grid of electronic light sensors that convert an image into a digital picture.
A warm-tone printing paper that has silver chloride and silver bromide emulsion.
Chromatic aberration, also called "colour fringing" or "purple fringing", is caused by a lens not focusing different wavelengths of light onto the precise same focal plane and/or by a lens rendering a different magnification each of different wavelengths. These two different types of chromatic aberration can both occur in one and the same image. Chromatic aberration can be seen as colour fringing around the boundaries that separate dark and bright parts of the image. It most frequently occurs around the edges of the image, especially in wide angle shots. Despite begin called "colour fringing" or "purple fringing", chromatic aberration can also affect black and white photography. Although a black and white image obviously has no colours in it, chromatic aberration can blur the image.
Processing materials made by Ilford that are used to make prints from colour slides. Although still widely used the Cibachrome name was changed to Ilfochrome over a decade ago.