This “Aerochrome v1” Film Simulation Recipe is for full spectrum infrared cameras, and not “normal” cameras, which have an infrared filter over the sensor. Fujifilm briefly sold a limited number of Fujifilm X-T4 ES (“Extended Spectrum”) cameras, which are full spectrum infrared (no IR filter). I don’t know how many of these cameras were made, but I think it’s a very small number. I was quite lucky to get one.
While the X-T4 ES is the only infrared camera that Fujifilm has ever made available to the general public (typically, they reserve them for “forensic, scientific, and cultural preservation applications”), there are companies that will convert a normal camera into a full spectrum model by removing the IR filter over the sensor. It’s an invasive and expensive procedure, but one of the few options available. What I cannot confirm is whether or not the straight-out-of-camera results from a third-party full spectrum converted camera are identical to the Fujifilm X-T4 ES. I believe that they are likely to be identical, but there is a chance that they’re not. I hope that Fujifilm will make more native full spectrum cameras in the future, and sell them to the general public. I’m certain that there is enough demand to justify it.
Aerochrome was an infrared film produced by Kodak between 1942 and 2009. It’s definitely not the only infrared color film ever made, but it’s the most popular and recognizable. You could achieve various aesthetics from Aerochrome by using different filters, with red, pink, purple, or orange vegetation as the hallmarks of the emulsion (especially red and pink). As far as I’m aware, there are not currently any color infrared films in production, and the few rolls of Aerochrome that remain are extraordinarily expensive. This “Aerochrome v1” Recipe mimics Aerochrome film, but it’s definitely not perfect. I’m currently working on two other Aerochrome Recipes, but the exact aesthetic I’m after has been a bit illusive so far (I’m close, though), so expect several versions to be published.
Aside from a full spectrum infrared camera, you also need specific filters. Since you are seeing light beyond the visible spectrum, filters are used to control exactly how the light enters the camera, which greatly affects the results. For this particular Recipe, a Kolari Vision IR Chrome filter and Hoya G(XO) Yellow-Green filter are required (I don’t think it matters, but I have the G(XO) filter in front of the IR Chrome). In my opinion, the Kolari Vision IR Chrome filter doesn’t produces acceptable Aerochrome results straight-out-of-camera by itself (at least not on Fujifilm); however, when used in conjunction with other filters it can be quite good.
This “Aerochrome v1” Film Simulation Recipe is intended specifically for the Fujifilm X-T4 ES camera; however, I’m sure it can be used on any full spectrum converted X-Trans IV or X-Trans V camera. For the X-Pro3 and X100V, you should use Highlight +1 and Shadow 0 (since those cameras don’t have 0.5 adjustments); additionally, for the X-T3 or X-T30, ignore Color Chrome FX Blue and Grain size. You might be able to use it on older cameras, adjusting for the settings that aren’t available on your specific model, but it will definitely render differently. It likely will work on newer GFX models, but with a slightly divergent result. If you have a regular Fujifilm camera, this Recipe will not work, as it requires a full spectrum camera like the X-T4 ES (and not the X-T4). Also, I’m not including this in the Fuji X Weekly App because it requires special gear.
Filters: Kolari Vision IR Chrome & Hoya G(XO) Yellow-Green
Film Simulation: Velvia
Dynamic Range: DR400
Grain Effect: Strong, Small
Color Chrome Effect: Strong
Color Chrome FX Blue: Weak
White Balance: Daylight, +8 Red & +7 Blue
Highlight: +1.5
Shadow: +0.5
Color: +4
Sharpness: 0
High ISO NR: -4
Clarity: 0
ISO: Auto, up to ISO 6400
Exposure Compensation: 0 to +2/3 (typically)
Example photographs, all camera-made JPEGs captured using this Aerochrome v1 Film Simulation Recipe on my Fujifilm X-T4 ES: