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How does a Shoot-Through Umbrella Work?

by Learn More Photo 1 Comment

A shoot-through umbrella works very simply by taking the light from a light source and expanding it’s spread.

A shoot-through umbrella is typically white and a fairly thin or translucent white at that. The light is intended to travel through the umbrella to reach it’s subject.

To show you exactly I’ve put together some diagrams that show where the light goes. For this example we’ll assume that an umbrella is a cut of a perfect sphere. The focal point, through which all the reflected light passes, is 1/2 * radius of the circle, or half way between the sphere’s center point and the edge of the umbrella.

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Filed Under: Flashes, Strobes & Lighting Tagged With: diagram, how it works, light, lighting, lighting setup, setup, shoot through, umbrella, white

Using Red Gel to Boost Greens in the Background

by Learn More Photo 1 Comment

I did a quick proof of concept test with my gels and SB600 today – it was pretty cool.

The thought behind this is: If we use a orange gel over a flash or strobe to add orange to a light on the subject to balance out the orange sun light on the background what we are also doing is using orange on our subject to add blue (orange’s compliment) to the background.

If that is the case – flip your thinking around and don’t use a gel to match your subject’s white balance to the background – bring out a color in the background by casting it’s compliment onto your subject! I wanted to bring out the spring green in the trees by using a red (green’s compliment) color cast on my subject. Read on to see how it went. Here’s a hint – it worked 😉

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Filed Under: Flashes, Strobes & Lighting Tagged With: complimentary colors, gel, green, lighting diagram, lighting setup, nikon, Nikon SJ-1 Gel, proof of concept, red, rosco, sb600, strobe

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