Assignment: Timed Exposure

SVHS PHOTO NOTES Timed Exposure:

You are going to create photographs that challenge the beginning photographer to experiment with light, motion, and the surreal.

Equipment: Tripod, cable release, flash, flashlight, lantern, sparkler....

Technique: There are several techniques that will be discussed, most exposure time is for as long as it takes or ALAIT.  ISO should be at 100, f stops will vary depending on the available light and the light sources.  When you view the photos, if they are too dark, open your lens.  If they are too light, close your lens down.  1.jpg

    F 22 will let in the least amount of light.   Closing a lens down means shifting to a smaller opening.

Start Here:  How to change your shutter speed to seconds...

Traffic Trails: Traffic trails are created by car headlights and/or tail lights passing by the camera while the shutter remains open. Most of the cars will not show up because they are moving.

1. The best time to shoot traffic trails is shortly after sunset or in complete darkness.

2. Major roadways work will because there is  a lot of traffic. BRACKET

3. Scout out locations early and make sure you are not in a position to get squashed!!!! EXPOSURE: Using the B setting expose the scene at f16 for 30 seconds (well lit areas). Use f11 for darker areas. BRACKET YOUR EXPOSURE

Ghost Images: Using an off camera flash or other light source, you can create ghosts in your photograph.

1. Compose an appropriate scene in a dark location.

2. Using f11 or f16 and the B setting on your camera. The lens should be open in a darker area with no ceiling or outdoors. Close the lens down when you are indoors.

3. Open the shutter and set off the flash, move the subject and set the flash off a second time. 4. Close the shutter.

Painting With Light: A small flashlight can take the place of a paintbrush and you can “paint with light” during the exposure. Tips: Using the B setting at f16 outline an object in an enclosed area. Areas outside, start with an f stop of 8 or 5.6.

Star Trails: Pointing your camera in the night sky produces some amazing results. Leaving your camera shutter open long enough will make stars appear as white light trails streaking across the night sky. Because the earth is rotating on its axis, a long exposure captures this rotating making the stars streak.

1. Wait for a clear night with few or no clouds.

2. Include a feature in your photograph. Buildings, house, trees, towers, anything to create foreground interest. BULB

3. You can use a flash, lantern, or flashlight to illuminate/paint subjects in the foreground.

4. Focus on the North Star and the stars will appear to circle around it. EXPOSURE: Using the B (BULB) setting on your camera set your f stop to f4. You need a minimum of 15 minutes to show the stars moving. The more time you leave the camera open the happier you will be with the results.


Equivalent Exposure: “Since both shutter and f stop scales are based on factors of two, the same film exposure can be achieved with a number of different shutter speed and f stop pairs. A camera setting of f/8 at 1/60 second produces the same exposure on the film as a camera setting of f/5.6 at 1/125 second because f/5.6 gives twice as much exposure as f/8 but 1/125 second gives half as much exposure as 1/60 second. The end result is the same. “ -Warren p31. Any one stop change is compensate by an equal opposite stop change.

If you meter f2.8 at 1/8 second at the Plaza, you can change it to an exposure you can use for night shots.