Eggcalc Exposure Calculator (Metric)

Step 1

Select Size of Diffuser & Soft Eggcrate®

Model: None Lightbanks Lowel Rifa-lites Butterfly & Overhead Style: None Width: 0.3 0.6 0.9 1.2 1.5 1.8 2.4 3.7 6.1 Height: 0.3 0.6 0.9 1.2 1.5 1.8 2.4 3.7 6.1

Step 2

Meter Offset & Distance

Horizontal: m   + 0.1m - 0.1m Vertical: m   + 0.1m - 0.1m Distance: m   + 0.1m - 0.1m

Step 3

Perform calculation Calculate

Result

Relative Change in Exposure with Eggcrate^® on Diffuser:

f-stops

Notes:

• Distance setting from diffuser and center axis will determine exposure change with use of Lighttools® Soft Egg Crates®
• Minimal center axis change in exposure begins at a distance of 3-4 times the diagonal dimensions of the diffuser;
• Egg Calc is based on an evenly diffused source such as bounced light exiting through full diffusion material.

For assistance, please call Lighttools® Canada @1.800.417.7431 (N. America toll free) or 1.780.438.3860
All rights reserved. ©Lighttools® 1999-2007.

EggCalc

EggCalc determines the distribution of light from large diffusers at any distance, both with and without egg crate screens.

• Launch Imperial version
• Launch Metric version
• More about Eggcalc

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