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- Vacuum back
- Is a camera back with a perforated plate through which air is drawn by a pump. A sheet of film is therefore sucked flat against the plate and held firmly during exposure used for special large format cameras such as copying devices where dimensional accuracy is critical.
- Vacuum easel
- Is a compact printing frame which ensures firm contact between the film and paper by excluding air between the surfaces. Some types are used to hold up the paper flat on the enlarger baseboard when enlarging.
- A measure from white to black, the higher the value, the darker the image.
- Vanishing point
- Is the point at which parallel lines, viewed obliquely, appear to converge in the distance.
- Vapor lamp
- A lamp containing a gas or vapor that glows with light when an electric current passes through it. Mercury, neon and sodium vapor lamps produce strongly coloured light. The light from fluorescent tubes is closer to daylight.
- Variable contrast paper
- Is a printing paper in which contrast can be varied depending on the colour of the printing light. This can be altered by using different colour filters.
- An electronic or computer-readable image format incorporating a formulate representation of graphical line art. Vector format is used during the markup process, to keep redlines separate from images and to facilitate easy modifications. This format is also often used during the edit process.
- Video Electronics Standards Association. A 32 bit display or other hardware card.
- View camera
- A camera with movements in which the taking lens forms an image directly on a ground-glass viewing screen. A film holder is inserted in front of the ground glass for exposure. Also called large-format camera (typically producing images 4x5 inches or greater).
- Either an optical or electrical display used to frame in the camera.
- Viewing lens
- The lens on a camera through which the photographer's eye sees the subject.
- Viewing screen
- The ground-glass element in a camera on which the subject is viewed.
- Location of the camera relative to the subject.
- Is a printing technique where the edges of the picture are gradually faded out to black or white. It also refers to a fall off in illumination at the edges of an image, such as may be caused by a lens hood or similar attachment partially blocking the field of view of the lens.
- Virtual memory
- Disk space on a hard drive that is identified asRAMthough the operating system, or other software. Since hard drive memory is often less expensive than additional RAM, it is an inexpensive way to get more memory and increase the operating speed of a application.
- Describes a part of a computer program that automatically duplicates itself, usually resulting in the damage or destruction of software and/or data. A virus can make a computer "crash".
- Visible light
- The portion of the electromagnetic spectrum that the human eye can see.
- Visible spectrum
- The electomagnetic spectrum of visible light; red, orange, yellow, green, blue, indigo, violet.