Re: Determining Curcuit Angle of View

[Ernst Dinkla <ernst@xxxxxxxxxxxxxxx>]

In <URL:news:lokaal.panorama> on Fri 25 Aug, Randy Vaughn-Dotta wrote:
> Fellow Panoramic Photographers,
> 
> I have been given two, recently reprinted,
> circuit panoramic contact prints 10" x 70".
> 
> I would like to determine the angle of view
> if possible.
> 
> Can anyone help me out or point me in the
> right direction?

Isn't it something like this;
given the ends of the contact print are really correct for
a 360 degree shot the radius would be 282 mm = 11" for the focal
length and the vertical angle 50 degrees at 10" = 254 mm
negative height. That is with focussing at infinity.
Larscan designs are based on that AFAIUI = as far as I understand it.

It is also the most common vertical angle for the 'normal' panorama
camera's: Noblex 150 = 53, Globuscope = 51, Widelux F8 + Poundshot 65
w/70mm = 49, Horizon 202 = 47, Noblex 135 + Roundshot 65 w/220 = 45.

Ernst
-- 
Ernst Dinkla  Serigrafie,Zeefdruk            The point will never be metric