Understanding Exposure

1. Understanding Exposure GETTING THE RIGHT AMOUNT OF LIGHT TO MAKE THE PICTURE

2. The Photographic Triangle Photography’s creative tools include: Aperture Film Speed Shutter Speed Photographer must decide which one takes priority.

3. The Photographic Triangle Aperture • most important for depth of field Shutter Speed • most important for action – show motion or stop action Film Speed • speed used allows for different aperture/speed combinations to provide a variety of creative effects

4. The Photographic Triangle Which element you choose as a priority will be the most important decision you make before taking a photograph. next

5. Film Speed • Choice of film speed affects the ability to achieve creative effects with aperture and shutter speed • Commonly measured using ISO number • 25, 50, 64, 100, 200, 400, 800, 1600 • each is twice as sensitive to light as the previous

6. Film Speed Speed of film determines its sensitivity to light Slow speed (ISO 25, 50, 64) • less sensitive to light • good for daylight • depending on the light, may require longer exposure times/larger apertures Fast speed (ISO 400+) • more sensitive to light • good for night, indoors/low light • depending on the light, can use shorter exposure times/smaller apertures

7. Film Speed