By Chuck Gloman, Tom LeTourneau
A mixture of conception and useful functions, putting Shadows covers the actual homes of sunshine and the choice of right tools for the very best influence. For the coed, complex beginner, and execs attempting to increase the glance in their productions, this e-book examines the basics and can also be an effective reference for pointers on greater functionality.
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Additional resources for Placing Shadows: Lighting Techniques for Video Production
Selenium cells generate a current that is proportional to the amount of light falling on them. The CDS cell modulates the current provided by a battery in a manner directly proportional to the amount of light reaching the CDS. Even though CDS meters are more sensitive than selenium cell meters, their added sensitivity is of no value to you if you are shooting in areas that are extremely dark, simply because it will be too dark to make good pictures under such adverse conditions. In dark environments, even though the “lux” illumination may be as low as a dark environment, the video grain increases with the absence of lights.
It is not useless, however. It is extremely important to the proper placement of instruments and the selection of accessories. Perhaps an understanding can be gained most easily by looking at a couple of examples. You move to a second actor standing 25 feet behind the first and take a second reading. You walk to a building 25 feet behind the second actor and take your third reading. 14). Example 2:You are shooting in a theater, using a 125-amp carbon arc spotlight to light the scene. You take a meter reading of the actor who is standing closest to the lens.
The distance from that same instrument to the subject’s shoes is 8 feet. When we square that distance, the value is 64. Using the resulting fraction, 16/64, we see that only 25% of the light that reaches the subject’s head will reach the shoes. That is a 4 to 1 exposure ratio, hardly even lighting. Using the same formula and placing the instrument 12 feet from the subject’s head, we find that 66% of the light that reaches the head will reach the shoes. That is a 41% improvement over the first case.