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shutter angle


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#1 darryl walthall

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Posted 21 July 2006 - 01:58 PM

Can I achieve a sharper image, with less grain, by manipulating the shutter angle or speed ? And if so, do I open the shutter or close the shutter to help achieve a sharp , grainless image?
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#2 Stephen Williams

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Posted 21 July 2006 - 02:22 PM

Can I achieve a sharper image, with less grain, by manipulating the shutter angle or speed ? And if so, do I open the shutter or close the shutter to help achieve a sharp , grainless image?


Hi,

A smaller shutter angle will give a sharper image as the exposure time is reduced. For a grainless image shoot with a low speed film.
Last week I saw a film being shot with a Viper with a 90 degree shutter angle. The Images were sharp and grainless!

Stephen
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#3 Bernhard Zitz

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Posted 21 July 2006 - 04:43 PM

Can I achieve a sharper image, with less grain, by manipulating the shutter angle or speed ? And if so, do I open the shutter or close the shutter to help achieve a sharp , grainless image?


smaller shutter angle = less motionblur = sharper image (but strobe-effect)


smaller shutter angle = less light on film = more lamps (or higher asa)

or

smaller shutter angle = less light on film = to shoot wide open = softer image


if you don't have enough light you could be forced to use higher asa, that could result in more grain... or you might film wide open (f-stop wise) that could result in softer images...
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#4 Chris Keth

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Posted 21 July 2006 - 06:32 PM

Can I achieve a sharper image, with less grain, by manipulating the shutter angle or speed ? And if so, do I open the shutter or close the shutter to help achieve a sharp , grainless image?



No. Grain and sharpness of a film image is a product of the speed of the film and how you expose it.

What the shutter angle can do, on the other hand, is control motion blur. A 90 degree shutter opening will have less motion blur than a 180 degree shutter opening. It will also, however, show a greaterstrobing effect because the time between exposures is slightly greater. It will also require a stop more light because it yields an exposure time half of that of a 180 degree shutter opening.
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