Lighting - Ken A Vision Vision Viewer 7890B Instruction Manual

Lighting:

Your Vision Viewer™ operates using ambient, room light. If using camera in a
severely darkened room, supplement the light entering the camera by using a
penlight, flashlight or small lamp near the camera, so that there is more local
input light for the camera to work with.
Never point your Vision Viewer™ at direct sunlight. Subjecting the Camera
"eye" to direct sunlight will discolor the filter over the CMOS chip causing
aberrant colors and or permanent focusing problems. It may even destroy the
camera's ability to capture an image.