Now review all the test shots in your post-processing software. You can readily see the differences between the un-gelled flash and the respective gels in the Red, Green and Blue histograms. Similar colors may vary between different companies' formulations – for example, many have a color named " bastard amber", but the transmitted color spectrum may be different. For this reason it is often misleading to refer to gel colors by name. Even a familiar color name, like Steel Blue, transmits widely differing colored light in each manufacturer's line. I am considering using it for my next wedding. I guess I would shoot a full CTS at about 3300K which I shot using the CTO? The most common gels used on a production are the blues and oranges to either warm up or cool off the color temperature of a lamp. Full CTB (Color Temperature Blue) is a fairly deep blue that will correct a 3200K tungsten lamp to daylight color temp (although you will lose two stops of output in the process.) Conversely, Full CTO (Color Temperature Orange) is a strong orange that will correct a 5500K daylight lamp like an HMI to 3200K balance to match a tungsten lamp, more or less. Neutral density and diffusion gels are sometimes mistaken as the same gel. Both reduce the intensity of light, but both gels inherently do different things.

What’s the difference between using CTO gels and CTB gels?

Gels that create yellow/orange light are known as CTO gels (Color Temperature Orange). These gels are available in various strengths as follows: There aren't many occasions when a flash will be too bright even at minimum power though, but a few examples could be: The CTO was oriented towards a white reflector for a soft and diffused light so the skin could have a orange under tone Just like the CTO example above, the gels allows to create some strong moods by using selective lightingThis article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Software applications such as Adobe Photoshop allow the user to correct colors to achieve the desired results in an image. Multiple tools available to correct colors, match colors, or change colors of images or of parts of images. With so many gels to choose from, how do you select the right ones for your budget? Try these essential four must-have gels on your next shoot.

CTO gels and CTB gels? What’s the difference between using CTO gels and CTB gels?

The key point I want you to look at in the images above is the Kelvin value. I’ve circled it in the top right of each image, but when you shoot the CTB/CTO splice ordinarily, it comes out very visually warm in the middle where the CTO gel is. But if we adjust the white balance/Kelvin on our cameras, we can correct that warm colour and thereby remove the orange looking subject. For regular folks who’ve followed my work for a while, you’ll already know that I’ve spoken about the optical snoot a lot already, but if you’re unaware of what this magic modifier does, you can see my full review on it here: Optical Snoot Review As you can see, the less light there is, the more saturated the color. Hence, when setting up a gel, the first thing you want to do is go low with the power and then dial it up to reach the look you are trying to achieve. Let’s look at some practical examples where I used gels for effect and I will tell you exactly what I did and why. Using Color Gels on a Fill Light Apollo Design Technology uses a four digit number based on the visible spectrum to designate and locate specific color transmissions.Understanding how to match your flash light to the ambient light in your shot also opens the possibility of changing the color of your lights to create color contrast between the two light sources, but first learn to match the color of the light and then experiment with creating contrast with color. Unfortunately, it doesn’t come cheap. In fact, a single roll will likely cost the same price as all the gels listed throughout this article, if not double. So, if you’re making your first short with little cash left to spare, you may want to leave it off the shopping list and try to control the light spill with well-placed objects. Continuing our run-through of areas relating to the color temperature of lighting, today we’re going to look at gels. Lighting gels can add a variety of creative flair to your lighting, such as taking a daylight-balanced light and making the light look like the pink glow similar to that of an evening sky. Or quite simply, a gel can be used to correct the color temperature to that of another light source. From 3200k tungsten to 5600k daylight, for example. The reason shadows on the face may look green when shooting indoor portraits is the inherent green in fluorescent lighting. The green comes from an inconsistency in tint that comes from indoor fluorescent lights. If the light is green enough you may need to add green color gels to your strobe. This is less common now that LEDs are more widely used. Purchasing and Attaching Gels