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An intervalometer is usually a handheld device with a long cord that plugs into a cameraâs auxiliary port. It looks and works very similar to a remote trigger release. The type of intervalometer youâll need depends on your type of camera.
What is a Hygrometer, Exactly? A hygrometer is an instrument that can range from something that is really basic in design, such as a psychrometer or the hair hygrometer, on up to more detailed instruments, like a cooled mirror dew point hygrometer, which actually measures humidity using the condensation temperature.