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AMATEUR MOVIE MAKING
animation, time condensation and in fact almost all trick and scientific work can be properly performed only with artificial light.
The arc is practical for use only with limited areas, the exact size of such area changing with the type and number of lamps employed.
Artificial light essential for title work.
permit exposures at predetermined times through an extended period.
No limit to area included in photograph other than mechanical limits imposed by intervening, objects.
Daylight entirely unsuited for title work.
So we find in the artificial light, a source of light which while limited in intensity is quite adequate for our purposes, and which is at all times under full control. The advantages are obvious when compared with the sun, which while supplying an unlimited amount of light (sometimes ! ) , is erratic, capricious, and absolutely out of our control ! The conclusion is obvious. The amateur who wants to make good films, the amateur who wants to make home films, the amateur who has dramatic aspirations, and the one who wants to add art to his work will all make full use of the artificial light. Only in making frankly exterior shots, which rarely have the value to us of the interior shot, can daylight be preferred to artificial. Of course, we do not mean to say that outdoor cinematography is a failure. Far from it ! But the amateur never knows more than half of the enjoyment which his camera can provide until he has worked indoors with artificial light.
The Arc Light. — The arc light is the most practical source of light for the commercial or industrial cinematographer as well as for the amateur. For this reason a few words regarding the arc as a type will not be amiss. If we attach two sticks of carbon or metal to the ends of the two wires which form an electrical circuit, touch the ends of these rods and then pull them apart, the current will continue to flow across the air gap. When the rods touch, the resistance to the passage of the current at the point of contact causes an intense heat to be generated. This heats the air and permits the current to flow across this hot air gap up