Watching Over

by Vian Esterhuizen

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1

You might direct the complainant to http://edgerton-digital-collections.org/docs-life/wartime-strobe, describing a strobe powerful enough to light a mountain -- so big, it was carried in a B-18 bomber. A photo of the strobe gear is at http://blog.invention.smithsonian.org/2013/11/04/seeing-in-the-dark-aerial-recon-in-wwii/. Of course, that still might not ...


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This one is sort of a frequent question. I have 2 photos on my computer, one taken with a flash, and one taken on a tripod; the actual subject is a castle on top of a hill taken from another hill somewhere about 500 meters from the castle. That is what I show, and next I ask do I need to go into GNs etc. Most folks are satisfied with the demonstration.


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I would say something along the line that in order to have a well-exposed picture, you should think of the camera like a bathtub, with light instead of water. In order to have a pleasant bath, you need enough water to cover you without overflowing the tub. Optionally, you can shrink the bathtub, so you need less water to fill it up, but you'll have a less ...


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I would direct her to the user manual that would explain details such as the guide number of the flash and the effective range of the flash. The user manual would also probably explain about enabling higher ISO, and may even mention recommendations to use a tripod for long exposures to avoid camera shake


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In a nutshell, what I did was explain to her that the camera has a sensor, which is sensitive to light (as film is for a film camera) That this image sensor ultimately records the light that passes through the lens and is projected onto it. In other words, when there is sufficient light, the camera does this with ease. When there is a lack of light in a ...


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The strict answer to your question is no. I say strict because your question says "the same as". The degree of wash out is related to proximity to the moon and, of course, the brightness of the moon. When the moon is visible in the sky the area of wash out is greater than when it's below the horizon. The further away you look from the moon the less the wash ...



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