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.

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.

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.

A zoom lens allows you to select one of a number of focal lengths with one lens.

You look at the picture you want to take, review photos after you've taken them, and read your camera's menu option on this type of display.

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

This refers to a photo format, such as RAW, that doesn't compress the image data.

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