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IIncandescent

Incandescent light refers to the illumination produced from typical household light bulbs (tungsten bulbs) incorporating a heated tungsten wire filament. The light produced is “yellow” or a warmer-than-daylight white balance. Setting a camera’s white balance to Incandescent will correct for the yellow cast.

In terms of color temperature, incandescent light generally falls between 2500 and 3500 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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I-frames
One of the three types of compressed frames used by the MPEG format. Find out more.
i-TTL Balanced Fill Flash
Nikon's i-TTL (intelligent through-the-lens) Balanced Fill-Flash automatically balances the output of the Nikon Speedlight and the scene's ambient light. Find out more.
i-TTL Flash Control
Nikon's i-TTL (intelligent through-the-lens) flash system meters every exposure, setting the Nikon Speedlight's output to the precise level needed to balance the scene's ambient light. Find out more.
IF Lens
A NIKKOR lens in which only the internal lens group shifts during focusing. These lenses will be designated with the abbreviation IF on the lens barrel. Find out more.
Image Authentication Software
Verify JPEG, TIFF and NEF (RAW) data taken using a compatible Nikon digital SLR. This secure software checks if an image has been processed or edited after capture.
Image Browser
An application that enables you to view digital photos. Some browsers also allow you to rename files, convert photos from one file format to another and add text descriptions.
Image Editor
A computer program that enables you to adjust a photo to improve or change its appearance.
Image Overlay
Image overlay combines two existing NEF (RAW) photos to create a single picture that is then saved as a separate file. Find out more.
Image Resolution
The number of pixels in a digital photo is commonly referred to as its image resolution.
Image Sharpening
A function that controls the sharpness of outlines in photographs.
Image Size
The dimensions of an image in pixels. Sometimes stated using abbreviations such as “L” (large), “M” (medium), or “S” (small).
In-Camera HDR
Select Nikon cameras have an in-camera HDR (High Dynamic Range) mode, in which the camera automatically combines two exposures to form a single image that captures a wide range of tones, from shadows to highlights. Find out more.
Incandescent
Incandescent light refers to the illumination produced from typical household light bulbs. Find out more.
Incident-Light Exposure Meter
A type of hand-held meter that measures the light falling on a subject. Not affected by a subject’s reflective properties, it should be positioned near the subject.
Indices/Index Marking
Index markers are used in editing. Select Nikon D-SLR cameras can place markers in the digital video file in-camera. Find out more.
Infrared Compensation Index
In infrared photography with most lenses, the plane of sharpest focus is slightly farther away than that in visible-light photography.
Infrared Film
Specially sensitized film that detects invisible infrared rays.
Infrared Photography
Refers to taking pictures in light beyond the visible spectrum.
Inkjet
A printer that places ink on the paper by spraying droplets through tiny nozzles.
Interpolation
The process whereby an image-editing program adds supplemental pixels that are created from the image's existing, neighboring pixels, in effect creating a file with more image data and thus producing better image output.
Intervalometer
A timing device that is used to trigger the camera's shutter at pre-determined intervals. It is used in time lapse photography. It is also known as an interval timer.
Inverse Square Law
This law of physics indicates that when you increase the distance between a subject to twice as far away from a light source, it will then receive one quarter of the light. Find out more.
iPhone App.
An application that works on the Apple Inc. iPhone, iPod Touch and iPad. The Nikon Learn & Explore app is free, and can be downloaded from the Apple App store. Find out more.
IPTC Presets
In select Nikon D-SLR cameras, IPTC presets can be imported into the camera before shooting, so as images are saved, the IPTC data is written to them, saving editors and photographers a great deal of time doing this in post-production. Find out more.
IPTC
ITPC stands for the International Press Telecommunications Council. Find out more.
ISO Control
Selected Nikon D-SLRs offer auto ISO control, a feature that will maintain a selected shutter speed range. Find out more.
ISO
Acronym for International Organization for Standardization. Refers to the international standard for representing the sensitivity to light of an imaging sensor or film by a numerical value.