Lens Focal length

Lens Focal length This is expressed in millimeters and represents the field of view of a camera lens. It is the distance between the focal plane and the rear nodal point of the lens, at infinity focus. For example, a 50mm lens has a wider view than a 100mm lens.

Lens Hood

Lens Hood This is an optional piece of equipment that can be plastic or metal. It is attached to the end of a lens to reduce or eliminate lens flare or other unwanted intrusion of light that may appear on your pictures.

Lens Wide-Angle

Lens Wide-Angle A wide-angle lens is any lens with a focal length smaller than what is standard for the camera format. For most digital cameras, 50mm is the standard length, so a 35mm lens would be considered wide angle.

Lithium ION (Li-ion)

Lithium ION (Li-ion) An alternative power source that is typically rechargeable as a complete battery pack for some digicams. Although Lithium ION batteries cost more than NiCad batteries, they offer many advantages


Lossy A JPEG file format is lossy because some of the image data is deleted, so the image can be compressed.