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FFluorescent

The illumination produced from a gas-discharge lamp or tube is called fluorescent light. Electricity to the lamp stimulates the mercury vapor within the lamp creating the emission of electromagnetic radiation which produces the fluorescence. This type of lighting is typically found in office buildings, warehouses and industrial settings. The light produced is “green” or a cooler-than-daylight light balance. Setting a camera’s white balance to Fluorescent will correct for the green cast.

In terms of color temperature, fluorescent light generally falls between 4000 and 5000 degrees Kelvin.

Color Temperature

Light Source

1000-2000 K

      Candlelight

2500-3500 K

      Tungsten Bulb (household variety)

3000-4000 K

      Sunrise/Sunset (clear sky)

4000-5000 K

      Fluorescent Lamps

5000-5500 K

      Electronic Flash

5000-6500 K

      Daylight with Clear Sky (sun overhead)

6500-8000 K

      Moderately Overcast Sky

9000-10000 K

      Shade or Heavily Overcast Sky

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Digital
Any device or system in which information is stored or manipulated by on/off impulses.
D-Movie Mode
An innovative feature first introduced by Nikon, DSLRs that can capture HD movies, is now available in the D7000, D3100, in 1080p, and in the D3S, D300S, D5000 and D90 in 720p. Find out more.
Definition
The clarity of detail within a photograph.
Download
A file or other information transferred from a camera, media card, CD, DVD, hard drive or the Internet to a computer or from one piece of computer equipment to another.
D-Lighting
A function built into several Nikon D-SLRS and into Nikon's Capture NX2 imaging program that allows you to brighten subjects that have been underexposed or enhance the contrast of an overexposed subject.
DVD
Digital Video Disc. A type of CD-ROM with greater data storage capacity and access rate. Most commonly used for movies and video data, its high capacity—4.7 gigabytes—makes it ideal for storage and backup of digital files and photographs.
Disc
The term used to describe optical storage media (compact disc).
Dispersion
A phenomenon in which white light rays deviate by different wavelength amounts resulting in a spectrum. The rainbow created by a prism is the result of dispersion.
Digital Image
An image that is represented by discrete numerical values organized in a two-dimensional array. The conversion of images into a digital form is known as digital imaging.
Digiscoping
Technique of taking film or digital still images or video by attaching a camera to a Fieldscope or Spotting Scope. Find out more.
Dioptric Power
Apparent image distance through optics such as viewfinders. Rated in diopters. A plus sign is used for positive lenses, a minus sign for negative lenses.
Depth of Field
The zone of acceptable sharpness in front of and behind the subject on which the lens is focused. Depth of field varies according to focal length of the lens, chosen aperture and shooting distance.
Diffuser
Any device or substance placed between the central light source and the subject that softens or spreads the light.
Depth-of-Field Preview
A feature on advanced SLRs that closes the lens down to the actual taking aperture to enable you to see the picture's depth-of-field.
Digital Photography
Photography that utilizes a digital camera to produce the image.
Dodging
Selectively lightening part of a photo using an image editing program or a mechanical technique in a traditional darkroom.
Dynamic Range
Photographers use "dynamic range" for the luminance range of a scene being photographed, or the limits of luminance range that a given digital camera or film can capture. Find out more.
Depth of Focus
A measurement of the distance behind the lens wherein the film plane will remain sharply in focus. Depth of focus is sometimes referred to as lens-to-film tolerance.
Digitization
Conversion of analog information into digital format so that it can be used by a computer.
Diopter
A measure of lens power equal to the reciprocal of the focal length. Eyeglass prescriptions are generally indicated in diopters. For cameras, the diopter is used as the measure of the dioptric power for the image in the viewfinder.
Double Exposure
Two exposures on the same frame. With film cameras, the film is not wound forward after the first exposure. In digital photography, a double exposure is most commonly made by combining two images using an image editing program.
D-TTL
The camera measures the amount of light reflected from the subject through the lens to automatically control flash output level and give correct exposure.
Distortion Control
Available in select COOLPIX models, Distortion Control provides optimum image quality for architectural and landscape photographs. Find out more.
Downloading
Moving computer data from one location to another. Though the term is normally used to describe the transfer of data from the Internet, it is also used to describe the transfer of photos from a camera's memory card to a computer.
Dual Shutter System
Certain Nikon digital cameras such as the Nikon 1 V1 digital camera utilize a dual shutter system, allowing you to choose from Mechanic, Electronic or Electronic (HI) shutters depending upon your shooting situation. Find out more.
D-SLR
A digital single-lens reflex camera.
Depth of Field Scale
A scale on the lens barrel with the markings of f/stops and distances, which shows the distance range that is in focus for a chosen f/stop.
DPOF
DPOF is the abbreviation for Digital Print Order Format. DPOF can be found on all Nikon COOLPIX cameras. Find out more.
Daylight-Type Film
A film balanced for proper color rendition when exposed in daylight.
Digitutor
Step by step tutorials on the use of current Nikon D-SLR cameras, NIKKOR lenses and Speedlights.
Disk
The term used to describe magnetic storage media (floppy disk).
Delayed Remote
The Delayed Remote mode is used when shooting with the Nikon 1 camera system and the ML-L3 remote control, to ensure no camera shake will occur. Find out more.
DC (Defocus Control)
A lens which allows the photographer to control the degree of spherical aberration in the foreground or background by rotating the lens' DC ring. Find out more.
DPI
Dots per inch. A measurement of the resolution of a digital photo or digital device, including digital cameras and printers. The higher the number, the greater the resolution.
Distortion
There are three types of distortion that could affect the shape of the image. Distortion cannot be corrected by stopping down the lens. It can be improved by the optical combination of positive and negative lens elements. Find out more.
D-Type NIKKOR Lens
A NIKKOR lens that sends distance information to the microcomputer of a dedicated Nikon camera. D-type lenses can be distinguished by a model name in which the letter D follows the maximum f/number.
Diaphragm
The mechanical device inside a lens that controls the aperture.
Dynamic Area AF
See AF Area Modes.
DX-Coded Film
Film that features embedded information that allows the camera to automatically set the film's speed.
DX Format
Refers to Nikon cameras that feature a 1.5 magnification factor imaging sensor. Find out more.