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.
By Michael A. Covington in the Sky & Telescope June 2012 issue. 1  Astrophotography with digital single-lens reflex (DSLR) cameras spans all facets of amateur astrophotography. Todayâs camera models have much lower noise than in the past and more features useful to amateurs.