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.
Get the Best Viewfinder. By definition, a DSLR features an optical viewfinder that shows you the exact image the camera's lens is capturingâbut not all of these viewfinders are created equal. A mirror directs light from the lens to the viewfinder, which is one of two types.