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Assignments and Information
for Jan 15-28, 2001 Remember we have a field trip to the Episcopal Cathedral on Sunday, Jan 21 at 3-5 PM. The field trip replaces class on Monday Jan 22.Read the two articles Color Film Lite
and Color Photographic Films. These are in the TIPS section of this site. The first is a short summary, the second article is much more comprehensive. |
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SUNSTARS There are two ways to creater sunstars, naturally or with a
star filter. Star filters soften the overall image. Natural sunstars are preferred. Sunstars are produced "naturally" when the light of the
sun bends around the aperture blades of the camera lens when then lens is set at a small aperture.To create a natural sunstar, you need the sun against deep blue sky. You can also create a
sunstar by putting the sun against (and partially hidden by), a dark object like a tree, moutnian side or building. Put on a long lens, or use spot
metering, set your aperture to f/16 or f/22, and meter a patch of clear blue sky away from the sun. (IT IS DANGEROUS TO YOUR EYESIGHT TO POINT A TELEPHOTO LENS ANYWHERE NEAR THE SUN). This is your base
exposure. For our example, let's say you came up with a meter reading of f/16 at 1/125 second.Put on a wide angle lens and compose your photograph. Use trees or water or buildings to create an
interesting composition. If you choose, you can partially hide the sun behind a dark object. DON'T EVER LOOK DIRECTLY AT THE SUN
, either with the naked eye or through a camera lens. Take your first picture at your base exposure (in our
example f/16 at 1/125 second). Then subtract one stop of light with your shutter speed and take another picture (using our eample, f/16 at 1/250). Subtract another stop of light (f/16 at 1/500 sec) and
take another picture. You might even want to subtract another stop of light and take one more picture (f/16 at 1/1000).You have now taken 3 or 4 photos at Base Exposure, Base -1, Base -2, and maybe
Base -3. In each successive picture the sky will appear darker and the sunstar more obvious. The best exposure will be determinded by everything in your composition. It is hard to judge ahead of time
which exposure will be best, that is the reason for the exposure bracketing. |
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