What is a Gray Card?
A gray card in photography is used to adjust white balance of camera under any light condition and it reflects 18% of incoming light. A white skin or a white object reflect the light at the same rate. Pro photographers use this card to ensure consistency of colour temperature.
DIY: How to Make Own Gray Card?
The gray card is a commercial item that can be easily purchased from many online markets. (Https://www.fotozeynep.com.tr/?do=shop&show=viewproduct&productid=9976).
However, it is also possible to make your own gray card by printing out a Word or Excel page which contains correct shades of gray, or by using business cards, book pages or fabrics which are the closest ones to the tones of gray.
How to Adjust WB with Gray Card?
- Gray card is placed on a smooth floor.
- A photo of the gray card is taken by using spot focus and automatic white balance (AWB). Focusing on the spot can help to get more accurate results.
- The next step is to load the custom white balance data of the photo from the settings by selecting custom WB. This is the process of calibrating your camera in accordance with the right kelvin value.
- Now all you need to do is select “custom white balance” for photos that will be taken in the same environment and continue shooting with this preloaded data.
A reminder. All these processes may be tiring for someone who has just started photography. In this case, it is possible to carry out white balance adjustments with PhotoShop after taking photos in RAW format with AWB. You can take advantage of the detailed narrative on this link:
Still, what we recommend is that you should manually adjust the Kelvin value. Because you pay a fortune for the camera you have, and most importantly, for the time and effort that you spent for photographing. Do not be afraid to make mistakes.
Wish you all good luck