Distance 1000ft (304 meters). Full moon night 1-25-2005. 1600 speed film. f/2 iris. Pentax MV1 ASA setting - 1250 ASA. Pentax MV1 SLR 50mm Lens with auto-shutter timing. Angular width of image is approx. 35 degrees.
Comments: In this image, the camera is looking directly down the optic axis of the green laser beam. The green laser glare overwhelms the car headlight. At this distance, the beam diameter is about 7 1/2 inches (19cm). The measured diameter was less than the predicated diameter at that distance, 12 inches (30cm). The glare effect photographed here is less than that seen with the naked-eye. The glare of the beam partially overwhelms the central visual field but some peripheral vision remains. Immediately after turning away from the beam, no flash-blindness was experienced. A brief one-second after-image of the beam's center was seen, as at 500ft. The after-image was a one arcminute or less point.
K. Fisher fisherka@csolutions.net (1-26-2005)