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Photography Glossary

IF Lens
A lens in which only the internal lens group shifts during focusing.
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 Resolution
The number of pixels in a digital photo is commonly referred to as its image resolution.
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.
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.
ISO
Acronym for International Organization for Standardization. Refers to the international standard for representing the sensitivity to light of a sensor or film by a numerical value.