Archived posting to the Leica Users Group, 1999/12/17

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] Re: full moon
From: Ted Grant <tedgrant@islandnet.com>
Date: Fri, 17 Dec 1999 17:58:39 -0800

Marc wrote:

>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.)

Hi Marc,

I figured the atmosphere must have something to do with it, the same as the
sun rise / set effect of bigger as it comes over or disappears from the
horizon.

But you know me and technical things! :)

ted.

Ted Grant
This is Our Work. The Legacy of Sir William Osler.
http://www.islandnet.com/~tedgrant