http://apod.nasa.gov/apod/ap070205.html
Sometimes the sky itself is the best show in town. On January 26, people from Perth, Australia gathered on a local beach to watch a sky light up with delights near and far. Nearby, fireworks exploded as part of Australia Day celebrations. On the far right, lightning from a thunderstorm flashed in the distance. Near the image center, though, seen through clouds, was the most unusual sight of all: Comet McNaught. The photogenic comet was so bright that it even remained visible though the din of Earthly flashes. Comet McNaught continues to move out from the Sun and dim, but should remain visible in southern skies with binoculars through the end of this month. The above image is actually a three photograph panorama digitally processed to reduce red reflections from the exploding firework.
Well I could probably go on forever with a bunch of technical babble but here's a couple of things to chew on:
The clear presence of Comet McNaught in the shot. Even with a more powerful telephoto lens it would be almost impossible to capture the comet with that sort of clarity with the same sort of exposure settings that have allowed for the fireworks and lightning strikes to feature.
The biggest giveaway is the distinct lack of water based reflection of the left and brightest lightning bolt. How can the fireworks give off such an intense reflection (proximity aside) when virtually nothing shines for the lightning strike that has equally glaring highlights in the shot. Even the lesser of the two lightning bolts to the right gives off a more powerful reflection.
http://digg.com/space/Amazing_Pa ... works_and_Lightning
The panorama consists of 3 photographs stitched together. Everything happened at the same time, but not exactly the same time, as that is a 3 shot panorama. Everything you see in the photo did happen inside 10 minutes or so, but it is not a single exposure shot.
The exposure time in each photo was, I think, 3 seconds. The people on the beach are lit by the exploding fireworks, that makes then seem pretty sharp. The long exposure also brought out the comet as it was not clearly visible for the naked eye.
Explanation: Sometimes the sky itself is the best show in town. On January 26, people from Perth, Australia gathered on a local beach to watch a sky light up with delights near and far. Nearby, fireworks exploded as part of Australia Day celebrations. On the far right, lightning from a thunderstorm flashed in the distance. Near the image center, though, seen through clouds, was the most unusual sight of all: Comet McNaught. The photogenic comet was so bright that it even remained visible though the din of Earthly flashes. Comet McNaught continues to move out from the Sun and dim, but should remain visible in southern skies with binoculars through the end of this month. The image is actually a three photograph panorama digitally processed to reduce red reflections from the exploding firework.
发表于 2008-1-14 00:22:22
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