5 second exposure using Tri-X 100 film.
This image of comet Bennett was taken on March 23, 1970, when the comet was magnitude 0.3 and had a tail 6 degrees long to the naked eye, despite the presence of a very bright moon.
The photograph was the first photograph of a comet that I attempted. It taken with a home-made camera based on a 50mm f/2.5 slide projector lens. The film was cut from 120 sized roll film and placed in a frame made from a tin can. The body of the camera was a simple box of wood. To stop stray light hitting the film, the back of the box was covered with a black cloth. The exposure was taken by removing a cover from the lens, hopefully without bumping it! The camera was aimed by sitting it on the roof of the car, propped up by books.
The comet is visible between the power lines near the right hand edge with a faint tail pointing towards the upper left.