I often get asked if the hot mirror should be removed from a digital camera to photograph auras. Digital cameras are as sensitive to near infrared radiation as they are to visible light, so ALL are fitted with an internal infrared blocking filter or hot mirror. If the hot mirror is removed the camera is HIGHLY UNLIKELY to photograph auras simply because it will flood with the full spectrum of infrared and we won't be able to see the infrared generated by buried metal. Removing the hot mirror does have an application for false color photography, which may show ground anomalies but this is very different to aura photography. For aura photography, what we are looking for is the older, lower specification digital camera, where the hot mirror is less efficient then the higher spec and more up to date camera and will allow enough infrared through to show an aura in the photograph.
I have invited treasure hunters and researchers to come forward with their tests on digital cameras for photographing auras but unfortunately I still have no reliable information on cameras other than Canon and
Olympus, although recently I have seen
some encouraging results from Nikon cameras.