February 28, 2015, 09:31:00 AM

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Topics - chris_w_digits

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Using a Rebel T2i and later, a 5D Mark III, I have found that red light is the most challenging environment for getting good results.   I shoot at a venue that has several different colors of staqe lights and some bands seem to prefer only having the red ones on.   While this looks cool in person, I've found that it is difficult to get good pictures preserving the red and have the images be bright enough since red is not a very highly illuminating color to our eyes.   I like not using the flash (to preserve the rich color from the environment) and if any of the other color lights are on, I get great results and can work with the photos in post to get brighter results that are still colorful.

I did the math and found that red light only has the opportunity to oscillate roughly 9 times across the width of a pixel in the 5D3's sensor, while blue light can oscillate roughly 14 times across that same width.   I find that subjects in red light do not look as sharp in the resulting image, and it's more apparent when one person is under a red stage light and another is under blue light (especially if a grayscale version is made), but I wouldn't think we're close enough to the limitation of being able to capture all the sharpness available in red light yet.

Have any of you experienced this with red light and what is your strategy for dealing with it?

Most common combos when shooting: 
Canon 5D Mark III: 70-200mm f/2.8L (non-IS version), Sigma 85mm f/1.4, Canon 135mm f/2 L .

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