The spectral sensitivity of the eye is about 400nm (nanometers) in the blue to about 700nm in the red. But the spectral sensitivity of a CMOS sensor is about 350nm in the blue to about 1050nm in the infrared.
The sensitivity in the infrared (IR) past 700nm is blocked by an IR absorbing filter in the camera. But the M8 has a weak filter that passes a fair amount of IR light. The IR light that is “leaked” can be used by attaching a filter to the lens that blocks visible light.
On most cameras you would need to use a tripod and take a long exposure with a visible light blocking filter. But on an M8 you can hand hold the camera to get stunning IR photos.
We will discuss how to set up your camera, choosing and focusing lenses and we will discuss filter choices. Then we will show images taken with various strength IR pass filters so you can start using your M8 again.