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Sunday, January 22, 2012

Neutral Density Filters

ND Filters

In this video you will learn that on sunny days, outdoor videographers use ND filters on their cameras to be able to keep the same shutter speed and cinematography look to their film.

Shutter Speed Difference DSLR Video from Olivia Speranza on Vimeo.

DSLR’s are hugely popular these days. A contributing factor of that is their ability to give you a very shallow depth of field. A lot of shooters love achieving film like videos that speak to us artistically and visually. When shooting with DSLRs, the basic rule of thumb to achieving a film like look to your videos is setting your shutter speed to about twice the value of your frame rate. If you’re shooting 24p then you’ll have your shutter around 1/50th. If you’re shooting at 60p, then your shutter will be around 1/120th.
Your shutter speed plays the key role in achieving this look and will make or break the simulation of film like quality. A slowed shutter speed is desired but in daylight this will overexpose your shots when your aperture is wide open. Since keeping a shallow depth of field means that you will need to stop down to a wide aperture, attaching an neutral density (ND) filter onto your lens will cut out the amount of light coming in and allow you to keep your aperture wide open. If you adjust the aperture to accommodate the slowed shutter speed in daylight, you’re going to lose the shallow depth of field which is often associated to the film look. - From Olivia Tech

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