On July 24, 1994, at 0940 Alaska daylight time, a float equipped Cessna model A185F airplane, N1758R, registered to and operated by the pilot-in-command, nosed over during landing on Campbell Lake located near the municipality of Anchorage, Alaska. The private certificated pilot and his one passenger, the sole occupants, were not injured and the airplane sustained substantial damage. The pleasure flight, operating under 14 CFR Part 91, last departed Sand Lake at 0930 and the destination was Campbell Lake. Visual meteorological conditions prevailed and there was no flight plan in effect. On the morning of July 24, 1994, the NTSB investigator-in- charge conducted a telephone interview with the pilot. The pilot said that he made a westerly approach to the lake with full flaps and normal approach speed. The flat light condition and calm glassy water affected his depth perception. The plane contacted the water prematurely in a flat attitude, slued sideways to the right, and nosed over.