Understanding Exposure by KarKar Photography Part 3: Shutter Speed
RecapThe exposure is the amount of light received bythe ﬁlm or sensor and is determined by how wideyou open the lens diaphragm (aperture) and byhow long you keep the ﬁlm or sensor exposed(shutter speed). The effect an exposure has dependson the sensitivity of the ﬁlm or sensor.
The Exposure TriangleIt is better to be under exposed than over exposed!
Correct Exposure• Balance of light and dark• Auto mode can generate• 6 or more combinations• Subject independent
Creative Exposure • Freeze action • Show action • Paint a picture • Pan or zoom • Make it rain by SCholewiakRight combination of aperture, shutter speed and ISO
Focus on Shutter Speed Using shutter speed to get creative exposures
What is the Shutter?Typically two curtains that open and close to let in light
Purpose of Shutter by unclebumpy Control the amount of light reaching the ﬁlm or image sensor.
Amount of Light by jurvetsonThe longer the shutter is open the more light
Lower is Faster• Often displays as whole numbers 60,125, 250, 500• Represents fractions of time 1/60 second• 1/2 as much light between stops (1/125 to 1/250)• Bulb setting• Control in shutter priority mode and manual
Hard to hold by Tor Håkon1/(lens mm) typical slowest shutter speed (Hand held)
Long Shutter by F 5.6A good pair of legs and head
Image stabilization by Rafakoy Sharp images up to 4 stops slower