And they actually work! He was able to correctly identify the colors of balloons, including ones he would usually have trouble distinguishing between (like green/yelllow and blue/purple).
I took this shot with a Sony A7s II and a Canon 50mm f/1.8 STM at f/3.5 and about 1/200 sec.
Click here to go to my profile page, then click 
in the upper right corner if you would like to see my posts regularly!
You can get in touch with me at my website mikemacintire.com
