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- Lag Time
- The delay between the time the shutter is pressed and the camera captures the image. Also known as shutter delay, it is most noticeable in compact digital cameras. Today's digital SLRs have virtually no lag time.
- Latitude
- The degree to which the exposure level can be varied and still produce acceptable results.
- LCD
- Liquid crystal display. A display screen on a digital camera or other digital device that lets you view information, data, camera settings or images.
- LED
- Light emitting diode. A semiconductor diode that emits narrow spectrum light, an LED is a source of light generally used to illuminate small areas. Often used in computer and imaging devices.
- Lens Coating
- A layer or multiple layers of thin, anti-reflective materials applied to the surface of lens elements to reduce light reflection and increase the amount of transmitted light.
- Lens Drive System
- Refers to the mechanisms that achieve movement in an autofocus lens. There are two types: in one, the drive motor is located inside the lens; in the other, a motor inside the camera body turns the lens via a drive shaft.
- Lens Hood
- A conical device placed at the end of a lens to block rays of light (most often from the sun) from entering the lens and causing glare or lens flare.
- Lens Shutter
- A shutter located near or inside the lens optical system. Lens shutters are used mainly in compact cameras and in lenses for large-format cameras.
- Lens Speed
- The maximum aperture of a lens. See Fast Lens.
- Lens
- An optical device that transmits light to film or a sensor.
- Light Meter
- Usually refers to a device built-in to the camera which measures the scene's light in order to determine the optimum exposure.
- Live View
- A feature of several new Nikon digital SLRs that allows you to view on the camera's LCD screen, in real time, the scene you are photographing.
- Lossless Compression
- A method for reducing the size of a photographic file so that when it is uncompressed, the resulting image matches the quality of the original source.
- Lossy Compression
- A reduction of image file size by disposing of unneeded data, resulting in a slight degradation of image quality.
- Low Key
- Refers to an image distinguished by overall dark tones.