Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 448
he balance ofadvantage is generally considered to lie with the refracting telescope. Briefly, itschief advantages are : (1) it gives a brighter image than a reflector of the same size ;(2).it gives a better definition ; (3) the lens does not deteriorate with age as does thespeculum in a reflecting… … PHOTOGRAPHER S CAMERA. 429 389. Photographers camera. — The photographers cameraor camera ohseura, of which A B (Fig. 328) represents a ver-tical section, consists of a dark box painted black on the B S T L c ~ ==) A Fig. 328. interior. A screen of ground glass, S, forms a partition inthe box. A…
Physics
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