October 25, 2014 at 7:06PM

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What's the deal with shutter angle?

Hi! Could someone kindly explain to me what shutter angle is, what you change in the image when you alter it, and why a DOP might choose to change the shutter angle rather than adjust aperture, colour temp or shutterspeed? Please and thank you! :)

3 Comments

I hope that this helps

http://en.wikipedia.org/wiki/Rotary_disc_shutter

Good day.

October 27, 2014 at 6:45AM, Edited October 27, 6:45AM

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Ragüel Cremades
Film producer and director
7486

Okay so:

Shutter angle and shutter speed are essentially 2 ways of saying the same thing. They both are how long the frame/sensor is exposed to light. 180° angle (or 1/48 speed) exposes the frame for 1/2 rotation of the shutter or 1/48th a second.

Colour temperature is an entirely different matter and is not something that should be changed instead of shutter angle.

The DP could change for a number of reasons. Lower shutter angles (higher shutter speeds) allow less motion blur and make the shots appear sharper and more staccato. This is often used in action sequences. Higher shutter angles (lower shutter speeds) allow more motion blur and are used sometimes in dream sequences.

Hope this helps

October 31, 2014 at 3:15PM

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Brandon Kelley
DIT/Director
627

Brandon said it all - Blackmagic cameras definitely use the traditional "shutter angle" nomenclature. With their newest updates, you have a plethora (yes, plethora, great word, highly underused) of options for smooth or choppy motion.

November 10, 2014 at 11:48AM

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Great answers. All I would add is that whilst the 'traditional' shutter angle terminology seems outdated when used to describe a modern digital camera, it's still preferred to by most DoP's as it's a 'relative' measurement, meaning that motion blur stays consistent even when changing frame rates, eg for overcrank (slow motion). So I can set 180 degree shutter angle on my camera, and not have to worry about changing it even when shooting a faster frame rate.

September 5, 2015 at 7:14AM

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Sam Gordon
Moving Picture Maker Man
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