Often referred to as the Ultra Color filter because it lets more visible light in, the 590NM filter on a converted camera is one of my favorites. It produces vibrant colors where leaves glow golden yellow and skies are bright blue.
There are a couple scenarios where you can work with this slice of the light spectrum. The easiest is to buy a starter kit, such as the Kolari Pocket Full-Spectrum Camera with Infrared Filter Starter Kit for $229. The 590NM is included in the kit. You can also have one of your existing digital cameras converted, or you can buy a converted camera in the lens mount of your choice.
Once you have your camera, and a 590NM filter mounted on it, then make a custom WB setting on a gray card, sidewalk, or similar toned surface. Now you're ready to shoot.
When you first look at the images, they will have a color scheme that looks something like this.
This is not the final product. The image is completed in post production using an editor that has a Channel Mixer. You can use Photoshop, RAW Power, or Pixelmator Pro to name a few. This is where you do what we call the "Red/Blue Swap".
The starting point is to go to the Red Channel and set the Red Slider to 0 and the Blue Slider to 100. Then you go to the Blue Channel and set the Red Slider to 100 and the Blue Channel to 0. Then you do a second pass where you further adjust the sliders to taste. Notice in the illustration above that I have in the Red Channel Red set to -0.14 and Blue to 1.7. That's how I got the effect that I wanted.
I worked with with B&W IR photography for years before trying my hand at color. In a previous article titled, B&W Infrared Photography with an R72 Filter, I talk about that process with a regular digital camera. But now that I've ventured into color work, I love having the option to shoot with either look, with 590 being my favorite.
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