There is an intensity in the moment of shooting a volcanic eruption from a helicopter; huge noise, the buffeting by eruption pressure waves, static electricity sending out localised lightning flashes and the amazing distraction of just wanting to see it all and not frame it in a photographic composition. So I shoot a lot of film and largely leave my editing to the lightbox later. In this case the imperfect symmetry of a rising eruption cloud and the contrast as the morning light hit it was an extraordinary moment.
Taken on Asahi Pentax 6/7. 75mm lens. 100 ASA Ektachrome film. Shutter speed 250/sec.