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- 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.
- 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.
- 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.
- Infrared Film
- Specially sensitized film that detects invisible infrared rays.
- IPTC
- ITPC stands for the International Press Telecommunications Council. 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.
- 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.
- 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 Photography
- Refers to taking pictures in light beyond the visible spectrum.
- 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.
- 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 Sharpening
- A function that controls the sharpness of outlines in photographs.
- Image Resolution
- The number of pixels in a digital photo is commonly referred to as its image resolution.
- 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.
- 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.
- 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.
- I-frames
- One of the three types of compressed frames used by the MPEG format. Find out more.
- Inkjet
- A printer that places ink on the paper by spraying droplets through tiny nozzles.
- 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.
- Image Editor
- A computer program that enables you to adjust a photo to improve or change its appearance.
- 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.
- ISO Control
- Selected Nikon D-SLRs offer auto ISO control, a feature that will maintain a selected shutter speed range. Find out more.
- 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.
- Image Size
- The dimensions of an image in pixels. Sometimes stated using abbreviations such as “L” (large), “M” (medium), or “S” (small).
- 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.