An 8-mm. time-lapse movie camera was developed to secure data on daily, weekly and seasonal cycles and fluctuations in recreational activity on selected Iowa lakes. The unit was self-contained in a waterproof and dustproof aluminum box and functioned automatically for 12 days on a single 50-foot roll of super 8 mm. Kodachrome film. Data were obtained on use cycles by boaters, water skiers, fishermen and swimmers. The most satisfactory data were obtained when the zoom lens of the camera was set at full telephoto (focal length of 35 mm.) and positioned to cover rather small, but popular, use areas for the various recreational activities. Counting and identification of boats was much easier under these conditions than when the camera was set at a wide angle setting (11 mm.).
Proceedings of the Iowa Academy of Science
©1968 Iowa Academy of Science, Inc.
Sohn, Arnold J.
"Time-Lapse Movie Camera for Recording Recreation Activity Cycles,"
Proceedings of the Iowa Academy of Science, 75(1), 184-189.
Available at: https://scholarworks.uni.edu/pias/vol75/iss1/29