Got my pictures back from a recent trip and one picture caught my attention:
Blue sky, almost black at the very top of the picture, no clouds and I think I can make out the curvature of the earth.
The picture was taken at FL410 or 430 at about 45N. The lens was set to about 100mm.
Question is: Is the curvature visable at FL430 or is it just the effect of my lens? At what altitudes can one make it out?
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