GETTING THE RIGHT AMOUNT OF LIGHT TO MAKE THE PICTURE

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

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

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

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

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

Speeds SlowMediumFast ISO25, 50, 64100, , 800, 1600 Exposure time (depending on the light) longmediumshort Graininesslacks grainsome graingrainy Qualityrich color, sharp vivid images rich color, acceptable sharpness colors less vivid, lacks good detail Forclose-ups, landscapes people, landscapeshand held action, lowlight Tripodrequiredsometimesseldom