Figure 8 - Higher resolution photograph (439k) of beam diameter at 1000ft - false color 1 sec. exposure

Beam diameter at 1000ft - false color 1 sec exposure

Distance 1000ft (304 meters). Full moon night 1-25-2005. 1600 speed film. f/2 iris. Pentax MV1 ASA setting - "B" manual for 1 sec. Pentax MV1 SLR 50mm lens. Angular width of image is approx. 35 degrees.

Comments: This image is identical in position to the 1000ft on-axis view down the laser pointer beam except now the camera has been turned around and the laser pointer's beam is projected onto an 8 1/2 x 11 inch pad of paper. This is an over-exposed false color image. A circle is drawn on the pad indicating the naked-eye diameter of the beam of about 7 1/2 inches (19cm). The measured diameter was less than the predicated diameter of 12 inches (30cm).

K. Fisher fisherka@csolutions.net (1-26-2005)