Here comes the LIGHT
Photo = light
Graph = draw or write
Photography = light writing or light drawing
Camera Obscura
Abelardo Morrell, Camera Obscura: View of Central Park Looking North-Fall, 2008
Abelardo Morrell, Camera Obscura: View of Manhattan, 2008
The Shutter – or exposure time (think - eyelid) You adjust the length of time the shutter remains open to control the amount of light that reach the lightsensitive surface.
Each full stop shutter setting is half or double the time of The next one.
The Leaf or between-the-lens-shutter
The Focal-Plane Shutter
Actual time in seconds
Shutter speeds your camera may display Full stop
1/3 stop
1/2 stop
1 sec
1
1 1.5
1/2 sec
2
1 1.3 1.6 2 2.5 3
1/4 sec
4
4 6
1/8 sec
8
1/15 sec
15
4 5 6 8 10 13 15 20 25
2 3
8 11 15 20
The Term “Stop” in photography refers to a change in illumination, whether the shutter speed or the aperture Is change to achieve it. http://wps.prenhall.com/hss_london_photo_9/68/17418/4459072.cw/index.html
The agreed standards for shutter speeds are: * 1/1000 s * 1/500 s * 1/250 s * 1/125 s * 1/60 s * 1/30 s * 1/15 s * 1/8 s * 1/4 s * 1/2 s *1s
Each standard increment either doubles the amount of light (longer time) or halves the amount of light (shorter time). For example, if you move from 1 sec to 1/2 second, you have effectively halved the amount of light entering the shutter.
TIP: Think about what is GOING to happen, rather than trying to catch up to what has already happened.
“Motion slows at the peak Of an action that reverses”
Additional setting: Bulb setting (B) Keeps the shutter open as long as the release button is held down. Time setting (T) opens the shutter with one press of the release, and close it with another.
Additional setting: Bulb setting (B) Keeps the shutter open as long as the release button is held down. Time setting (T) opens the shutter with one press of the release, and close it with another.
Fast Shutter Speed = Freeze the action Left: 1/3200" Right 1/6400" - an important difference in sharpness
Slow shutter speed suggested movement motion (blur). - a longer time passes from the moment the shutter opens till the moment it closes. More time is available for movement in the subject to be recorded by the camera.
Oliver Follmi, Pilgrimage to Bodghaya, India, 2002 Slow shutter speed (long exposure)
Simon Bruty, Turin Winter Olympics Panning (moving the camera to follow the subject) & use slow shutter speed (long exposure).
Stefan Newell, Coloured Lights in Gran Canaria Long exposure (slow shutter speed) & move camera against stationary objects
The Aperture is the size of the lens opening that control the brightness of the light that reaches the sensor or film. (think pupil of an eye) http://upload.wikimedia.org/wikipedia/commons/a/a3/Eye_dilate.gif The size of an aperture is indicate by its f-number or f-stop. Lens is said to be “stopped down” when the size of the aperture is decrease. Fast lenses allow you to shoot more easily in low light or at higher shutter speeds. (large aperture) The faster the lenses = the more expensive (f/1.4 is faster than f/2)
Shutter speeds your camera may display Aperture in full stop
1/2 stop
1/3 stop
f/1.4
f/1.4 f/1.7
f/2
f/2 f/2.3
f/2.8
f/2.8 f/3.4
f/4
f/4 f/4.7
f/1.4 f/1.6 f/1.8 f/2 f/2.2 f/2.5 f/2.8 f/3.2 f/3.5 f/4 f/4.5 f/5
http://wps.prenhall.com/hss_london_photo_9/68/17418/4459072.cw/index.html
Depth of field is the area from near to far In a scene that is acceptably sharp in a photograph.
This lens has depth-of-field scale
Most camera will automatically Show the scene through the widest aperture Tip: check your camera manual. It may have depth of field preview button!
Depth of field increases as the lens stopped down to smallest aperture (here at f/16)
Oliver Follmi
Large aperture, less depth of field blur the background--good for portrait
Small aperture = more depth of field > good for detail.
Using Shutter and Aperture together Both shutter speed & Aperture affect the amount of light entering the camera. Shutter Speed Aperture
= Time = size of the lens opening
Light Compensation You can change one setting as long as you Change the other in the opposite way. You can use a larger aperture if you need a faster shutter speed or smaller aperture if you Need a slower shutter speed. Remember! Shutter Speed affects the sharpness of moving objects Aperture affects depth of field-sharpness from near to far.
F/16 > small aperture = Deep depth of field 1/8 sec> slow shutter speed = motion burred
F/4 > medium aperture = Some motion sharp, less sharp background 1/125 sec> medium shutter speed = freeze some motion but the exposure is still too long to show the motion of the bird’s wings sharply.
F/2 > large aperture = Shallow depth of field = out of focus background. 1/500 sec > fast shutter speed = freeze all motion & produced motion sharp.
-2
-1
+1
+2
-------------l---l---l---I---l---l---------------
I = standard exposure level Shutter Priority
= you set the desired shutter speed the camera sets the aperture
Aperture Priority
= you set the desired aperture the camera sets the shutter speed
Exposure Compensation -Bright situations -Dark situations
0 compensation
+ 1.5 compensation
James Nachwey, Alabama, 1994 - Prisoner on the chain gang
Oliver Follmi
Simon Bruty, Embassy World Darts Championship