Tombaugh had no camera, but he was able to make highly detailed drawings at the eyepiece.
The amateur astronomer recorded images of Jupiter and Mars in this way, and sent them to the Lowell Observatory, so impressing the astronomers there that they offered him a job.
To make the discovery, Tombaugh used a blink comparator to compare his photographic plates of the same star field taken at different times.
These clocks gave not only the time, but also astronomical information as well.
155 mm f3 refractor made from a military aircraft camera lens.
It uses a special corrector lens between the objective lens and the camera that allows the focal length to be very short.
The difference being, the more correct timing of the Earth's rotation, or Waiting for "first light" with a home-built 108mm refractor on a home-built astronomy cart.
The cart has a built-in 12-Volt source, a scanner radio for NOAA weather, leveling jacks and a custom shelf for a DVD burner I use when making videos of the sky.