What’s the Difference? is a series of lighting tutorials. Each article responds to a single question. In this post, Jared Platt explains the difference between using a CTO gel and no gel.
In the past few blog posts, I have been detailing various scenarios where I use a gel to color the light coming from my flash to match the ambient light, or to contrast against it with an opposite color gel. In the first post, we dealt with a cloudy, rainy, cold day where the sun’d ambient light was very blue because it was blocked by the clouds. In that case, the ambient light was at approximately 6500 kelvins, which is very blue in color. In our second challenge, we photographed indoors and battled it out with a 1960s army of 5000 kelvin florescent lights in an AmTrack train car. But in today’s example, we will race the sun for a portrait with an ambient light temperature of close to 1800 kelvins.