I intend to photograph the upcoming Falcon 9 launch from 10 miles away shooting North with a Canon 16 - 35 F4 lens. Everything I have read suggest shooting at ISO 100 at F20. Intend to keep the lens open for about 2 minutes and 45 seconds . Question 1 any comments upon that setup ? Question 2 With the rocket heading in an East Northeast trajectory does it make sense to have the camera in a horizontal vs vertical position to capture a streak photo? Question 3 is 16 mm wide enough or would someone recommend purchasing a Rokinon autofocus 14 mm F 2.8. I know Rokinon offers a 12 mm but it is not autofocus and I don't trust my eyes to pre manual focus but rather use autofocus on some distant object before launch.