Moony 16?

iandavid said:

Formula 1 is also a pleasing subject, I believe!

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Too many little lights on the stearing wheel, glowing brakes, sparks, etc.

Horseracing by moonlight perhaps?

Synchronized swimming.


But what shutterspeed do we need? And will we need a voltage converter?

I'm sure there must be an international standard covering these sorts of subjects. A voltage converter is only the beginning...

Re the brightness of a moonlit scene, someone else on APUG recently posted a link to the following EV chart which appears to have some good starting point recommendations (eg full moon = EV-3):

http://www.fredparker.com/ultexp1.ht...ensity Chart

Q.G. said:

Remember though that instead of spending hours shooting a landscape lit by the moon, almost entirely the same effect could be achieved shooting it in a fraction of a second lit by the sun.
Different would be the star trails, which you don't get in the day , and the motion blur in anything showing teven the slightest movement.
And the funny colour cast caused by a very long exposure.

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With the sun in the frame?

I remember reading that moonlight was 1/1,000,000 that of the sun during full moon.

So on a clear cloudless night, the light would be 20 stops less than the sunny 16 exposure.


Steve.

EASmithV said:

Ansel Adams used the light from the moon as a constant to calculate exposure.

So, on a cloudless, clear night, what is the exposure time for a full moonlit landscape at f16?

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Adams used the exposure formula, with the luminance expressed in units of candles/sq.ft. This is a measure of the luminance of the light source, not of the footcandles of light illuminating a surface. He placed the moon on Zone VII. He wanted to make sure he got the moon right.

But it was not yet sundown when he took that picture. The sun illuminated the clouds, which is why he had to use water bath development to keep them from blowing out. A straight print of that negative shows the sky at about Zone VI. He burned the living hell out of the sky to get the print you see in books. (I've seen early prints of it with a very light sky below the moon.) I think it's a poor photograph for you to emulate if you want a landscape lit by the moon, because Moonrise was lit by the sun. In the 40 photographs book, he recounts how the folks at the High Altitude Observatory in Boulder CO computed the time of the exposure at 4:05 PM, October 31, 1941. Even on the winter solstice there will be plenty of sunlight at 4 in the afternoon in the continental US.