Monday, Sept. 6 Class Notes (Please make corrections or additions as needed)

**The "right" photograph constitutes of the right EXPOSURE, or the right amount of LIGHT that reaches the camera's film (the combination of aperture diameter and shutter speed).

• Not enough light = Dark (underexposed) photo (shown as "-")
• Too much light = Bright (overexposed) photo (shown as "+")

SHUTTER SPEED:

• A measure of how long the camera's shutter is open for (found in the upper-right corner of the top of the camera)
• The LONGER the shutter is open, the MORE LIGHT that enters the camera (vice versa)
• Generally ranges from 1/4000th of a second (fast shutter speed or short exposure time) to 4 seconds (slow shutter speed or long exposure time)

• 4 sec-1/15 = Need tripod **USE MORE LIGHT**
• 1/30-1/60 = Generally good rang
• 1/125-1/4000 = FAST (very good quality cameras)**USE MORE LIGHT**

APERTURE OF DIAPHRAGM:

• Changes focus:
• OPEN diaphragm = SMALLER depth of film
• *1.8 = Completely open (large) diaphragm
• More light
• SMALL diaphragm = LARGER depth of film
• *32 = Very small diaphragm
• Less light

• **If RED light is on the MINUS ( - ), REDUCE the speed or OPEN the diaphragm
• It's generally better to have an open diaphragm, because we usually do not have a tripod 

SENSITIVITY OF FILM:

• Ranges from 50 1SO/ASA - 6400 1SO/ASA

• Low Sensitivity:
• Cannot use inside - grain is very small
• Use when there is a very dark scene (i.e. in theater)
• The LESS the sensitivity level, the More amount of light that is needed! 
• High Sensitivity:
• Large Grain

-JM