Lighttools CU focus eggcrate

for those of you that are not familiar with a CU focus grid i recommend you watch this video first before scrolling down to the examples

this is a unique eggcrate, as it doesn't just control the spread of light it effectively focuses the light in a direction

all the cells in the grid are pointed toward the center block off cells effectively funneling the light out the center of the grid

http://www.youtube.com​/watch?v=OtI2SSht9cg

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for these next 3 images the subject is measured at F/5.6 at each distance from the grid

the Cu grid is 45* to the subject at camera left and i'm shooting straight on

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now the subject moves closer to the grid but is again measured at F/5.6

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okay, set up stays the same except this time i metered the subject straight out from the grid @ 6' at F/9

for all the subsequent pictures refer to my chart for F stop loss and position to the grid

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again refer to the drawing for position and loss

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here is an example of the grid pointed down on a 45* angle and 45* to the subject camera right

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It's a challenge to completely describe the light distribution changes created with even a normal grid on a large diffused source and more so with what we are calling a CU Focus (with cells that are cone shaped!) However, understanding how these two different blocking tools control light from large sources offers a really important lighting basis for photographers. Although I have been making egg crates for almost fifteen years, I am still learning the implications of using them for light control. Here is a link for a page on our still in-development web site that attempts to describe the nature of a cone shaped egg crate. (we hope go live in a few weeks)
http://www.hardliquid.​ca …t-eggcrates-advanced.html
Stephen
Lighttools, Inc

thanks for your input Stephen, this focus grid sure is different in the way it controls light compared to a normal egg crate

the link you provided gave me some good info and the diagrams helped too