1. DIGITAL EXPOSURE E = I x T x S By Robert J. Courtemanche, CJE rcourtemanche@galenaparkisd.com rcourtemanche@galenaparkisd.com Galena Park HS, Texas Permission for use granted for any classroom teacher in a public or not-for profit / non-profit school system.

2. DIGITAL EXPOSURE E = I x T x S Exposure = Intensity x Time x Sensitivity

3. DIGITAL EXPOSURE E = I x T x S Picture = amount of light from lens x time shutter is open x the sensitivity of the image sensor

4. DIGITAL EXPOSURE E = I x T x S Picture = f/stop x shutter speed x ISO

5. INTENSITY The intensity of light is controlled by the f/stop (aperture) The aperture controls the size of the hole that lets in light.

6. INTENSITY f/1.4 f/2 f2.8 f/4 f/5.6 f/8 f/11 f/16 f/22 Poor Light Indoors Outside (Sunny Sixteen)

7. TIME The shutter speed is controlled by the shutter speed dial. This regulates the shutter to open and close correctly.

8. TIME SLOWFAST 1 2 4 8 15 30 60 125 250 500 1000 2000 TRIPOD NORMAL ACTION

9. ISO “FILM” SPEED HOW FAST THE CAMERA CAN CAPTURE LIGHT 100 - OUTDOORS, BRIGHT SUNLIGHT 200 - OUTDOORS, CLOUDY 400 - INDOORS, WITH LIGHT OR FLASH 800 - NIGHT WITH LIGHT OR INDOOR WITH LOW LIGHT 1600 - NIGHT WITH LOW LIGHT 3200 - NIGHT WITH VERY LOW LIGHT

10. E = I x T x S SET AND THEN FIND 1) Set your ISO based on your light conditions 2) Set either your shutter speed (shutter priority - best for sports or action) or set your f/stop (aperture priority - best for low light situations with little action). 3) Let your camera find the other one (f/stop or shutter speed). 4) Take a picture or two. 5) Adjust - one setting at a time