PHYSICS 109 Study Guide - Final Guide: Normal Mode
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Iso more light (know these by heart) Initial conditions: 1/1000 exposures time, f/4 f number, want same amount of light, f/4 f/10, 4 steps less light so we need 4 steps more light, 1/60 seconds = exposure time. Initial conditions: 1/60 exposure, f/8 f number, want same amount of light, 1/60 1/250 is two steps less light (right, f/8 two steps left gets us f/4. Initial conditions: 1/60 exposure, iso 100, f/11 f number, answer, iso 4002 steps right, more light, 1/60 exposure (no change, f number needs two steps less light, so two steps right, f/22. Problem 5: f/22 f number, 1/60 exposure, f/5. 6 f number, 1/1000 exposure, high f-number gives us smaller aperture, which gives wide depth of field. Problem 6: conditions, 1/60 exposure, f/5. 6, 200 800, solution, two steps right, more light, so need two steps right for less light for f number, f/11.
