By Understand this first: true infrared photography underwater is physically impossible. Water absorbs infrared wavelengths within mere centimeters of the surface, making those ethereal IR effects you’ve achieved on land completely unachievable once submerged. The physics are unforgiving—infrared light penetrates water about as effectively as a brick penetrates concrete.
If you’ve seen images labeled “underwater infrared,” they’re either captured at the water’s surface with specialized techniques, heavily post-processed visible-light images, or deliberately misleading. This isn’t a matter of …
