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90 degree shutter


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#1 darryl walthall

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Posted 22 July 2006 - 12:25 AM

so how can I shoot with a 90 degree shutter angle without getting a strobe effect yet keep the sharpness and grainless image quality ?
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#2 Aaron_Farrugia

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Posted 22 July 2006 - 12:37 AM

at 90 degrees you shouldnt get much strobing id say 90 degrees is at that point where if you were to close it down further youd notice the strobing
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#3 David Mullen ASC

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Posted 22 July 2006 - 11:53 AM

Shutter angle has no affect on graininess, only the amount of motion blur.

Less blur, more crispness to the motion and image, but more strobing. More blur, less crispness and less strobing.

The only way to reduce strobing and keep the 90 degree shutter angle would be to reduce the amount of motion -- but if you reduce the motion, you might as well use a 180 degree shutter angle because now you'd have less blur softening the motion anyway! You see the problem?

It's all connected. The real problem is the standard 24 fps rate, which is so low as to need a certain amount of blurring to reduce strobing, which is the result of not having enough motion samples per second.

So you can reduce blurring and get more strobing, or increase blurring and get less strobing, but you can't reduce both blurring AND strobing unless you shoot and project at a faster frame rate, like 48 or 60 fps -- but that's not a standard presentation rate.

In other words, you want to reduce graininess and increase sharpness... use a bigger negative format.
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#4 Stephen Williams

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Posted 22 July 2006 - 12:26 PM

so how can I shoot with a 90 degree shutter angle without getting a strobe effect yet keep the sharpness and grainless image quality ?


Hi Darryl,

I notice this is the 3rd thread you have started on shutter angles in the last few days. It would make more sense just to continue the original thread.

Stephen
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