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itsfullofstars:

Earth Photography: It’s Harder Than It Looks
By Astronaut Don Pettit

From  my orbital perspective, I am sitting still and Earth is moving. I sit  above the grandest of all globes spinning below my feet, and watch the  world speed by at an amazing eight kilometers per second (288 miles per  minute, or 17,300 miles per hour).
This makes Earth photography complicated.
Even with a shutter speed of 1/1000th of a second, eight meters (26 feet) of motion occurs during the  exposure. Our 400-millimeter telephoto lens has a resolution of less  than three meters on the ground. Simply pointing at a target and  squeezing the shutter always yields a less-than-perfect image, and  precise manual tracking must be done to capture truly sharp pictures. It  usually takes a new space station crewmember a month of on-orbit  practice to use the full capability of this telephoto lens.

itsfullofstars:

Earth Photography: It’s Harder Than It Looks

By Astronaut Don Pettit

From my orbital perspective, I am sitting still and Earth is moving. I sit above the grandest of all globes spinning below my feet, and watch the world speed by at an amazing eight kilometers per second (288 miles per minute, or 17,300 miles per hour).

This makes Earth photography complicated.

Even with a shutter speed of 1/1000th of a second, eight meters (26 feet) of motion occurs during the exposure. Our 400-millimeter telephoto lens has a resolution of less than three meters on the ground. Simply pointing at a target and squeezing the shutter always yields a less-than-perfect image, and precise manual tracking must be done to capture truly sharp pictures. It usually takes a new space station crewmember a month of on-orbit practice to use the full capability of this telephoto lens.

Feb 25 2012
446 notes
Reblogged from itsfullofstars
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    science. how does that work?
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    Earth Photography: It’s Harder Than It Looks
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    Something I never would have thought about, though it probably should have been common sense.
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