What is a Rogue Flash Gel? Professional photographic gels, or lighting filters are are made from specially dyed polyester films designed to transmit a specific quantity and color of light. Rogue Flash Gels are manufactured from professional lighting filter material that we process into kits specially designed for use with round flashes and rectangular speedlight flashes. Using Color Gels for Portrait Photography Colored lighting filters, or gels, are often used on accent or background lights to enhance an image with sometimes soft, or vibrant colors. For example, attach a Silky Lilac gel to your rim light, Blue Steel gel to your fill light, or Olallieberry Purple Pie gel to your gridded background light to enhance your image with playful colors, mood or drama. Using Color Correction Gels Color correction gels are also available to help improve your color balance when shooting with flash. Your images will look more natural, and you will save valuable time color correcting your image files simply by using the appropriate color correction gel whenever you shoot with flash. For example, use a CTO gel when shooting in tungsten, halogen, or incandescent ambient light. Use a CTB gel when shooting in open shade, or in a room with a north facing window. Use Plug Green gels in combination with CTO gels whenever shooting in rooms lit with fluorescent light tubes. We include a reference card with easy-to-follow instructions to help you identify which filter to use in some of the most common lighting situations. Printed Gels Are East-to-Use Rogue Flash Gels are easy to identify and easy-to-use with the color and f/stop loss values printed on each gel. The white balance correction gels also include the kelvin color correction and corresponding white balance reference printed on each gel.