Star Trails at 420mm!
This image of Mauna Kea is taken from over 20 miles away, at the Mauna Loa observatories. Keck is using their adaptive optics laser, and the mountain is lit by the moonlight.
I went up to Mauna Loa last night and brought along a 300mm f/2.8L and 1.4x teleconverter in order to do ultra-high-res panoramas of Mauna Kea at sunset. The winds were freakishly low, so I actually was able to continue after sunset and do long exposures. At this extremely long focal length, any amount of wind would be fatal. This image is a stack of several 5-minute exposures. Altogether, I'm impressed.
Star Trails at 420mm!
This image of Mauna Kea is taken from over 20 miles away, at the Mauna Loa observatories. Keck is using their adaptive optics laser, and the mountain is lit by the moonlight.
I went up to Mauna Loa last night and brought along a 300mm f/2.8L and 1.4x teleconverter in order to do ultra-high-res panoramas of Mauna Kea at sunset. The winds were freakishly low, so I actually was able to continue after sunset and do long exposures. At this extremely long focal length, any amount of wind would be fatal. This image is a stack of several 5-minute exposures. Altogether, I'm impressed.