This is one of my favorite shots of the Sun. Taken the evening after the Venus transit in Western Australia. Ricoh KR5-II, USSR manufacture Tair-3S lens (300 mm), 3x tele-converter. I can't remember what f-stop I used, but I have a feeling I had it closed right up... f22, so 3 stops further than that? Film was probably Fuji 400.
I had only 2 frames left after the transit, and I hoped to catch the green flash. I took this shot from the hills outside of Coral Bay, and already you could see some green appearing on the upper limb of the Sun. As the Sun set, the green grew more pronounced and started spread along the limb to the water line until it completely lined the remainder of the sun. As it disappeared beneath the horizon the lining expanded until what was left of the Sun was vivid green, I snapped my last shot... I had been adjusting the exposure to match the disappearing light and when I pressed the shutter release, the camera was on bulb
Blew it to the proverbial.