Diy Expodisk Easily get your white balance right by making your own expodisk

We have in one of our earlier posts discussed about white balance and also about how to make use of the custom white balance settings feature in modern digital cameras. So inorder to set custom white balance settings right, you need to point your camera to a white object in the scene or a white/grey card that you carry and set the image as reference for white balance in your future shots.

There is one product available in the market to make this process easier, you might have already heard of it, if not it is called the Expodisk. It is a device that you can mount on your camera’s lens. Expodisk is made of semi transparent material that allows light to pass through it. Remember it only allows some light to pass through and not shapes as a result all that the camera will see is the white light (depending upon the light source camera will see different shades in the white disk for example if you point your camer towards a fluorescent light your camera will see a greenish white and if you point your camera towards a light bulb the camera will see a reddish white). What actually happens is that the camera calculates the present images deviation from actual white light and applies that margin of correction automatically. So that you get accurate colours in your photos.

Here is the procedure for using expodisk Mount the Expodisk, switch your camera to manual focusing mode, point it to the light source with which you are going to shoot, click one picture and in your camera set it as the picture for white balance using custom white balance settings.

Well to me everything looks cool except that I do not wish to spend money just to get the white balance right in my images. Here is one simple and easy way to make your own diy expodisk.

Take a lens filter, the glass element need not be good because you could even make your diy expodisk without the glass.

For the white substance we choose the lid of our disposable lunch box. Any semi transparent white surface would do, if you plan to use paper use butter paper because plain white paper when used gives a yellowish shade.

Now that we have the raw materials let's make quick work of our diy expodisk.

First disassemble the lens filter take the inner ring and using it draw a circle on the lid through which you will cut.

Using a scissors cut out the round shape that you have drawn.

Now that we have our round piece perfect lets proceed to assemble it.

Re assemble the lens filter putting the cut plastic sheet in front of the glass.

Your diy expodisk is now ready for use.

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