Have you heard of Kodak Aerochrome? It was a legendary false color infrared film stock with roots in military surveillance. Today, it's effectively unobtainable, but false color infrared is still possible!

This image came out of a Sigma SD1 Merrill with the removable hot filter swapped out with a 3D printed housing for a Green X1 filter. This was inspired by some work done by Fent L. and Meldrum A. in a 2016 paper^[1].

Here is the filter in its 3D printed housing installed in the camera:

Anyhow, I just wanted to document the process somewhere, and I quite enjoyed the project's results. I hope you do too!

1. ↩ Fent, L., & Meldrum, A. (2016). A Foveon Sensor/Green-Pass Filter Technique for Direct Exposure of Traditional False Color Images. Journal of Imaging, 2(2), 14. https://doi.org/10.3390/jimaging2020014