What is this ExpoDisc?

Posted on November 7, 2012


A tool I frequently use often but rarely mention is the ExpoDisc. This is a tool I use to set the custom white balance of my camera all the time. No more messing with grey cards, white cards, and getting inaccurate white balance. It has the amazing ability to be able to set the white balance accurately under any lighting situation. It is simple to use – just place it over the lens and capture an image with the auto focus off. You will have a greenish/blue grey picture. Then fine the set custom white balance and choose that image. Done. Set your camera to custom white balance and you are done. Easy peasy.

You may be asking why this is an important tool? It works through incident light to set the white balance. This means that it will correct the white color to a correct value no matter what the lighting situation – in the shade, direct sun light, with florescent lights, with incandescent,  or any type of light. The key is to set your white balance at the beginning of any set of images that you take. No more corrective color filters to adjust for the different tones that creep into the images you take. This also simplifies post processing of your images, too. No more guessing at color adjustments to get the ones just right or wondering what the real light tone should be. It neutralizes any light source to a common tone. They are set when you capture the image.

There are two versions of the ExpoDisc: neutral and portrait. The neutral disk is for getting a normal what balance for animals and landscapes. The portrait disk sets the white balance a little warmer and is intended to bring out the skin tones in the human subjects you photograph. Because I shoot mostly people, I mostly use the portrait disc.

Which size disc should you buy if you get one? Simply buy the largest one for the largest lens you have. There is no need to buy one for each size lens you have. For the smaller lenses, simply hold the larger ExpoDisc over the lens of the smaller opening and it will work pretty much the same.

Now you know one of my secrets to capturing a great image that I never talk about.