Housatonic Museum of Art
Housatonic Community College
900 Lafayette Blvd., Bridgeport, CT 06604
For information call
Robbin Zella, Director,
ANSEL ADAMS LESSON PLAN
Meters, f/stops and Focal lengths
A water faucet represents the aperture. Imagine you are filling a glass
with water. If the faucet is open all the way, would it take a longer
or shorter time to fill the glass half-way than if the faucet was only
letting out a trickle of water?
Photography Exposure Experiment
Goal: To fill a receptacle to the half way mark, which represents
the correct amount of light needed for proper exposure. (Less would not
be enough light - making the image too dark. Full would be too much light
- making the image too light).
- Water faucet. Or container such as a salt shaker with 2-3 sizes
||Using the small opening, start filling
the receptacle and stop at half way.
(Takes the longest time)
||Using the middle size opening, start
filling the container and stop at half way.
||Using the large opening, start filling
the container and stop at half way.
(Takes the shortest time)
Observation: To expose film for a determined amount of light,
the smaller the opening (aperture) the slower the shutter speed. øThe
larger the aperture, the faster the shutter speed.
Conclusion: Aperture and shutter speed are functions of each