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.
What is an SLR system? The main advantage of an SLR camera over the point-and-shoots is that you can change the lenses so you can have exactly the right lens for the subject you're shooting. SLR stands for Single Lens Reflex and DSLR stands for Digital Single Lens Reflex. When you look through the viewfinder, you actually look through some prisms and mirrors, and you wind up looking through the lens.