Archibald Barr has written:

'Telemeters and range-finders' -- subject(s): Optical range finders, Telemeter

The first RangeFinder camera brand was a Kodak 3A Autographic Special. The RangeFinder cameras were also sometimes labeled as "telemeters". They were first made in 1916.

Telemetry typically refers to wireless communications (i.e. using a radio system to implement the data link), but can also refer to data transferred over other media, such as a telephone or computer network or via an optical link or when making a robot it can be over a wire.