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Joellen Wilcox
{K:102} 10/10/2001
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The last time I saw this on random images, I became so embroiled in the rule thing I forgot to say I think the combination of sunshine, red hat, happy smile and interesting hair do combine for a pleasing portrait.
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Chris Whaley
{K:3847} 9/9/2001
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Good explanation Dave...thanks.
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Joellen Wilcox
{K:102} 9/8/2001
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Thank you for taking time to explain the rule -- I do understand as I learned to use the manual settings on our AE-1 a long time ago -- the digital camera I take on trips allows only a few adjustments but after hanging out here, I may need more control and I copied your answer for future reference.
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Dave Holland
{K:13074} 9/8/2001
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Joellen, here's the amateur version that you should keep in your head. The sunny f16 rule is used to approximate correct exposure during shots in the midday sun.
Set your camera at f16, then set the exposure at as close as you can come to the ASA speed of the film. For example 100 ASA film would be shot at 1/125 (as close as you can usually come to 1/100) at f16. This rule is an approximation for sunny, medium-toned objects at midday. It was used a lot in the days of manual, off-camera light meters. It is used less often now, but there are occasions when the rule is more accurate than automatic light meters. For example, light meters are often inaccurate when the background is large and unusually light or dark.
Once the exposure for f16 has been set, you can adjust the f-stop up or down. Just remember to move the shutter speed up or down in a reciprocal manner to deliver the same amount of light to the film. i.e. if you open the f-stop one stop, you also have to reduce the shutter time by one stop to deliver the same amount of light per shot. Many cameras will do this reciprocal shift for you automatically. Try it out, double checking on your camera's light meter.
These comments still apply when you use a digital camera, even though you aren't using film. Your camera should tell you what ASA speed it is running at. If not, you can figure it out backwards by using the sunny f16 rule. Of course, this is provided your camera tells you the f-stops and shutter speeds. If your camera is a point and shoot version, it is all done behind the electronics and you often can't adjust.
I hope this is clear. If not, any introductory photo text will have a passage explaining this more simply.
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Joellen Wilcox
{K:102} 9/7/2001
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Thank you, Chris, for taking time to put the information here-- unfortunately not a rule I can carry around in my head :)
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Chris Whaley
{K:3847} 9/7/2001
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From inside Polaroid film box.
Rough estimate for exposure under said conditions.
f=aperature
1/250=shutter speed
Exposure for 200 speed film in snow set to f22 at 1/250.
Exposure for 200 speed film on a Sunny day/no clouds set to f16 at 1/250.
200 speed film on sunny/slighlty cloudy f11 at 1/250.
200 speed film on cloudy day/some sun f8 at 1/250.
200 speed film on cloudy/rainy day set at f5.6 at 1/250
This is off the inside of Polaroid film box.
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Joellen Wilcox
{K:102} 9/7/2001
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I'm a newbie -- would you mind telling me the sunny 16 rule? -- I need all available help. Anyway the I like the highlights on her skin so the rule worked well for you.
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Debbie Groff
{K:9569} 9/6/2001
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I think the sunny 16 rule worked very well for you. Love the colors and lighting. And the smile is priceless.
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