Archived posting to the Leica Users Group, 1999/12/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 03:03 PM 12/17/1999 -0800, Ted Grant, sage Nestor of us all, wrote: >I have to question this size at the horizon and height above the horizon >not making any difference in the size of the moon recorded and as seen by >the eye. Ted This is certainly an "optical effect" but it is one as real to chemistry as to the eye. That is, shooting a picture of the moon near the horizon makes it seem larger than it really is, due to the effect of refraction through the greater envelope of atmosphere, rather than the niggardly one when the moon is overhead. (The difference is something along the lines of 100 miles of air vertically versus 350 or 400 miles horizontally.) Marc msmall@roanoke.infi.net FAX: +540/343-7315 Cha robh bas fir gun ghras fir!