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Name used by Kodak for its range of digital SLR cameras.
A portable flash gun which can be coupled with an automatic camera and can then be controlled by the camera's programmed functions.
Manufacturers' factory settings for hardware or software that can usually be overriden and then returned to the safety of default settings should problems occur.
Automatically joining segments of data that have been split when saved on the hard disk. Doing this tidies up the drive and creates more space.
Areas of a negative or slide that appear dark and don't transmit much light.
An instrument used to measure the density of film or paper images.
A numerical measure for the darkness of a tone.
Program mode on some Canon cameras that sets the optimum aperture to ensure enough depth of field to make the whole of the subject sharp.
The distance between the nearest and furthest parts of a subject that are acceptably sharp. For more information, see this Depth-of-field article in the Techniques section.
A button or lever on the camera that either stops the lens aperture down manually or electronically. This enables you to view the image at the aperture that will be used to take the picture. The view will be darker, but you will be able to see exactly what will and won't be sharp or in focus. See "Using the depth of field button" in the Techniques section.
A scale on the lens that indicates how much of the subject, from the nearest to furthest point from the camera, will be in focus.
The distance the film or printing paper can be positioned either side of the focus point and still maintain acceptably sharp results.
To remove the marching ant selection from an image, returning this, or a file to its unselected state.
The computer window that displays your open files or images, along with folders, program menus, tools and palettes.
Chemical ingredients of a developer that convert all the exposed silver halides into black metallic silver.
A box that appears on-screen that asks for or suggests more information before a task is completed.
The technical name for the lens aperture that is made from overlapping blades.
An optical effect which can soften photographs and make them less sharp. As long as light travels in straight lines, this phenomenon will not occur, but as soon as it starts to bend - disperse or "diffract" - when it has to travel through a hole so small that it has to squeeze through, it will begin to interfere with the quality of the final result. Although a negligible effect in most situations, it actually increases with smaller apertures. There is a break-even point at which the disadvantage of the diffraction of the light captured is still compensated by the advantage of extra sharpness due to greater depth of field. But beyond that point the softening effect of the diffracted light is only partly compensated by the sharpness due to the greater depth of field. Finding the break-even point can help prevent any negative effects of diffraction. And as a bonus it will limit the length of the exposure or the ISO needed to take a photo with a very small aperture. The difficulty is that the effect isn't the same for different cameras and lenses. The aperture isn't the only critical factor - the size of the film or sensor recording the photo counts as well, and so does the quality and the focal length of the lens. For those who don't want to get into complicated mathematical calculations in order to find the ideal aperture, it is good to remember that the sharpest results for most lenses are found around two or three stops below their maximum aperture. Especially cheaper lenses can give very bad results at full aperture.
A digital camera is a modern way to take photographs. They have many advantages including not having to use film, not causing any processing costs, giving instant results, creating e-mailable pictures and pictures that can be improved with the use of a computer. Many are compact shaped, but there are also bigger SLR types.
A photograph or work of art which is made up of pixels.
Developed jointly by Kodak, Canon, Fuji and Matsushita, DPOF is a function that appears in some digital cameras to allow users to order prints of specific pictures from files stored on the cameras memory card, such as CompactFlash, SmartMedia or floppy d
Cameras with figures in this column have a digital zoom that increases the magnification of the optical lens by the quoted figure. To do this it uses part of the CCD so the resolution is reduced to allow for the increase magnification. If you dont intend making big enlargements this is useful other wise stick to the optical zoom. Most cameras have the option to turn the digital zoom on or off.
The process of converting something into a digital format.
A plug-in chip that contains (part of) a computer's internal memory or RAM.
German-based film speed rating used in Europe before ISO became the norm. A three DIN increase doubles the films light sensitivity.