SpaceX Falcon 9 Iridium-4 Launch from Vandenberg AFB

Shot on Dec 22, 2017, this is the launch of SpaceX’s Falcon 9 rocket with a bunch of Iridium satellites. Shot from the southern Sierra Nevada mountains. You can see the 1st stage booster separate and start its retrograde burn with the RCS thrusters firing. Auto-focus wasn’t working too well so I had to keep messing with manual.