Re: nodal points

[WDAVID <WDAVID@xxxxxxxxxxx>]

> Any advice I can get
> on setting it and on a mechanism for helping me mount the camera
> accordingly, would be much appreciated.

The nodal point is where incoming parallel light rays cross and invert
as a result of lens refraction.  Put a vertical stick in 2 feet in front
of your camera and, through the lens, note something behind the stick,
"far" away.  Rotate the camera and observe through the lens.  If the
"something" moves out from behind the stick as you rotate, you are not
rotating over the nodal point.  Shift your camera slightly forward or
back and repeat on its mount.  If the "something" now moves faster, you
moved your camera in the wrong direction.  Repeat until you can rotate
your camera and things behind the stick remain behind it.

Simon will not tell you to remove the stick before exposing the film. 
(Its one of his secrets).

-- 

Best regards,
W. David Schwaderer

http://www.amazon.com/exec/obidos/Author=Schwaderer%2C%20W.%20David/002-5596264-0325832