The sensors should be sensitive[1] well into the near-IR, and there are people in the astrophotography community which can service digital cameras to remove the

The sensors should be sensitive[1] well into the near-IR, and there are people in the astrophotography community which can service digital cameras to remove the IR-cut filter, these[2] for example. Another alternative I was thinking about is just to use one of those monochrome astrophotography cameras, something along the lines of this[3]. The monochrome version doesn't have the IR-cut filter and sensitivity is pretty ok down into near-IR. edit: The IMX492 sensor in that one has a 40% response at 850nm, and 850nm IR diodes are plentiful and shouldn't emit[4] much at all below the 700nm of the IR-cut filter the color camera should have. Not sure how mixing sensor sizes and such would affect things, or if it's better/easier to just run two of the same camera. [1]: https://s1-dl.theimagingsource.com/api/2.5/packages/publication/whitepaper-camera/wpspectsens/a5cb0f39-fea8-56ae-8e04-ec20ab4e72c9/wpspectsens_1.30.en_US.pdf https://s1-dl.theimagingsource.com/api/2.5/packages/publicat... [2]: https://www.lifepixel.com/ https://www.lifepixel.com/ [3]: https://www.zwoastro.com/product/asi294mm-mc/ https://www.zwoastro.com/product/asi294mm-mc/ [4]: https://lumileds.com/wp-content/uploads/files/DS191-luxeon-ir-domed-line-datasheet.pdf https://lumileds.com/wp-content/uploads/files/DS191-luxeon-i...