Anger!

This question may or may not be related to the flare, but I didn't want to
post another thread.

Anyway if I render my code:

#include "colors.inc"
#include "textures.inc"
#include "stars.inc"

#declare cam_loc = <0, 0, -10>;
#declare light_loc = <0,0,0>;
#declare lookat = <0, 0, 0>;
#declare sky_vect = <0,1,0>;
#declare flare_brightness = 5;

#include "bigstar.flr"
#include "nkflare.inc"


camera
{
        location <0, 0, -10>
        look_at <0, 0, 0>
}

sphere // transparent sphere containing media
 { <0,0,0> 1
  pigment {rgbt 1} hollow
  interior
   { media
     { emission 10
       density
       { spherical density_map
         { [0 rgb 0]
           [0.8 rgb <1,1,0>]
           [1 rgb 1]

         }
       }
     }
  }
}

sky_sphere
{

    pigment {
        granite
        color_map {
            [ 0.000  0.270 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.270  0.290 color rgb <.5,.5,.4> color rgb <.8,.8,.4> ]
            [ 0.290  0.470 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.470  0.490 color rgb <.4,.4,.5> color rgb <.4,.4,.8> ]
            [ 0.490  0.680 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.680  0.700 color rgb <.5,.4,.4> color rgb <.8,.4,.4> ]
            [ 0.700  0.880 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.880  0.900 color rgb <.5,.5,.5> color rgb < 1, 1, 1> ]
            [ 0.900  1.000 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
        }
    turbulence 1
    sine_wave
    scale .5
    }
    scale 0.1
}

The sun is there and the flare is very nice. Note I am 10 units back on the
Z axis. The shpere radius should also be 1 unit. If I move the camera back
to 100, or 1000 units on the Z axis, the sun still appears to be same size
on the scene!

This isn't what I want to happen - I effectively want to zoon out to get a
wider view. What I am doing wrong and/or have missed in documentation/FAQs?

Thanks very much for your help.

PS If you change the camera position be sure to change cam_loc (near the
top) to the same values.

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