Like all other types of batteries, Li-ion batteries will wear down over time, holding less and less charge. Apple says its laptop batteries will reach 80% of their original capacity after âup toâ 1000 full discharge cycles. Other manufacturers commonly rate their batteries 300 to 500 cycles.
A digital single-lens reflex camera (also called a digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film.
Aperture is the term used to describe the amount of light that passes through a camera lens. DSLR lenses have an iris within them, which will open and close to allow certain amounts of light to reach the camera's sensor. The camera's aperture is measured in f-stops.