trimetrogon

A common installation was the trimetrogon: one vertical, and one oblique to each side.

A K-17 trimetrogon (three-angle) camera for panoramic shots.

One vertical, one split vertical, and one trimetrogon each using a six inch Fairchild K-17 camera.

Cotton pioneered (for the British) the trimetrogon mount and the important innovation of heated cameras, fogging being the bane of high-altitude photography.

The mountain was photographed by the Ronne Antarctic Research Expedition, November 1947 (trimetrogon air photography).

However, a multi-lens trimetrogon had been used in the 1919 U.S. Bagley mapping camera, and Germany had heated optics during the Great War.

Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy trimetrogon photography, 1958-60.

Mapped from trimetrogon air photography taken by Ronne Antarctic Research Expedition, 1947-48, and from survey by Falkland Islands Dependencies Survey, 1948-50.

They were photographed from the air by the United States Antarctic Service, September 28, 1940, and by the Ronne Antarctic Research Expedition (Trimetrogon air photography), December 22, 1947.

It was photographed by the Ronne Antarctic Research Expedition (Trimetrogon air photography) on December 22, 1947, and roughly surveyed by the Falkland Islands Dependencies Survey in December 1958.

It was photographed by the Ronne Antarctic Research Expedition (RARE) in November 1947 (trimetrogon air photography), and so named by RARE geologist Robert L. Nichols because the country rock is a plutonic breccia.

Also in 1964, VX-6 conducted the first flight from Cape Town, South Africa to McMurdo Station, the first flight of a U.S. aircraft to the Soviet Vostok Station, and the first successful demonstration of trimetrogon aerial photography, used extensively to map Antarctica.