I had previously full-spectrum modified my Nikon D5300 when I initially wanted to use it as a dedicated astronomy camera. This modification lets in a lot of deep red and infrared light, which gives the images a strong red balance and not great focusing abilities. It also renders it useless as a terrestrial camera since the white balance has been destroyed. I recently purchased a Hutech HEUIB-II filter for the camera, which is a clip-in filter that goes between the lens and the sensor. This filter passes hydrogen alpha, the dominant spectral line in emission nebulae, while blocking a bit of deep red and infrared frequencies. This lets the camera still serve as a great astronomy camera while restoring terrestrial white balance.
As a test, I did a short timelapse of the moon rising. A polarizing filter also helped deepen the sky and reduce glare.
