Archived posting to the Leica Users Group, 1999/01/08

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Subject: [Leica] Re: M's and Rainbows
From: George Huczek <ghuczek@sk.sympatico.ca>
Date: Fri, 08 Jan 1999 16:57:44 -0600

At 12:41 PM 08/01/99 -0800, you wrote:
>Do I have it correct that to photograph a full rainbow(radius of  42
>degrees) the photographer must have a 21mm lens?
>
The 21 almost gets it all in, but not quite from ground level with a flat
horizon.  If you have a "ragged" horizon with trees, mountains or
buildings, you might get away with it.  I haven't tried it in the mountains
or from an airplane, but from terra firma on the Canadian prairies the
primary rainbow doesn't quite fit the long dimension of the frame with the
21mm, and the secondary rainbow is nowhere near to reaching the ground.
We're about 580m above sea level.  Altitude makes a difference.  If you are
up high enough in an airplane, you can get 360 degree rainbows, if you are
lucky.  I've gotten the hemispherical rainbow in with a C**on 17mm lens in
35mm format from the ground.

   
 _
[o] -GH