JOU 3355 Lecture Notes - Lecture 2: Shutter Speed, Exposure Compensation, Bokeh
17 Feb 2017
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Document Summary
Iso (light sensitivity; lower number, lower light sensitivity) Higher iso decreases image quality (introduces grain and noise; reduces detail) If you increase sensitivity (high iso), you need less light to get to same exposure. Iso 400 double sensitivity of iso 200 (200 requires half as much light as 400) Better to shoot at lowest iso possible and then edit film-look in later (post-production) Shutter speed (how long the shutter stays open) Choose to freeze or show motion (1/500th freezing; 1/100th showing) Combined with iso, the amount of time it takes to get to correct exposure. You can manipulate shutter speed with iso. Aperture (controls amount of light that reaches sensor) A fractional measurement (so is more than ) Controls depth of field (focus v. bokeh) Wider aperture = more light, increases shutter speed, decreases iso. *all three have an exposure related control, and an artistic related control.
