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- Halation
- A phenomenon that arises when light scattered within the film emulsion continues through the film base and is reflected.
- Halftone
- A reproduction of an image through a special screen. The screen is made up of a variety of different sized dots to simulate shades of gray in a photograph.
- HDR (High Dynamic Range) Photography
- HDR photography is a method of capturing in a single image the wide range of tones in a high contrast scene-a range that our eyes can discern, but digital sensors can't render.
- High Eyepoint
- An extended distance from the eyepiece to the eyepoint.
- High Key
- An image distinguished by overall bright, light tones.
- High-Magnification Viewfinder
- A viewfinder used for viewing the entire image at a magnification higher than that with a standard viewfinder. Useful for close-up work, copy stand work and when trying to focus on subjects with fine detail.
- Highlight
- The bright- and light-tone areas of a subject or scene.
- Highlights
- The brightest parts of a photo.
- Histogram
- A graphic representation of the range of tones from dark to light within a photo. Some digital cameras include a histogram feature that enables a precise check on the exposure of the photo.
- Hot Shoe
- A mounting device, usually built onto the top of a camera, that enables a flash unit to be mounted on the camera.
- Hot Swappable
- Provides the option to plug and unplug a computer peripheral or a camera into and out of a USB or FireWire port while the computer is on.
- Hue
- A term that describes the entire range of colors of the spectrum.
- Hyperfocal Distance
- The closest point you can focus a lens and still have the depth-of-field include infinity.