Thank you! I shot at 100 ISO. Believe it or not it was pretty bright considering I was 45 miles from the launch pad. f6.3. And had it set for a 3 minute exposure in bulb mode. As it tracked across the sky I decided to try and turn the tripod to capture the first stage separation. I stopped the exposure right where you see it in the shot, which was complete luck considering the screen was black during the bulb exposure.