There's really not much to tell beyond what you see. The camera is built around a WWII wide angle aerial recon lens and a 4X5 plate camera back. The field coverage is approx. 36x45 degrees. Internally there are two large Kodak Wratten gelatin filters on swinging arms, one to record the blue ion tail and another to record the dust trail. Either can be swung into place behind the lens. A resistive heater wrapped around the lens prevents dew.
In addition to Halley, this wide field camera has been used to record other long tailed Comets like West '70, Bennett '76, Hale-Bopp '97 and Bradfield '04. The filters were added specifically for Comet Halley but have proved useful for the last two really interesting comets. It's now in storage, awaiting its next assignment. I still have 4x5 sheet and 35mm 2415 film in the freezer, just in case another comet passes by.
Edited by Richard O'Neill, 14 September 2019 - 07:03 PM.