Re: fisheye or roundshot?

[Glenn Barry <glenn@xxxxxxxxxxx>]

The easy way to see this is to put the lens on look through the viewfinder
or ground glass and watch the degree of image distortion as you rotate the
camera. Fisheye mapping and compression requires that this is quite severe,
more so at the edges agreed, but it is present throughout the frame
including the centre. Just look at a straight line in the middle of the
frame. It must begin to curve the moment you rotate the lens due to the
fisheye projection. There will always be some blurring.

Glenn

Rod Sage wrote:

> >
> > Fisheyes on a scanning slit panorama camera do not work very well.
> > For example if you set the rotation and film transport speed/ratio to
> > give you a good image in the centre of your picture you will find that
>
> > the further you go from the centre toward the edge the more streaked
> the
> > subject will become.
> >
> > Cya
> > Steve
>
> Wouldn't it depend on the width of the slit? A narrow slit will have
> less distortion taking place on the top and bottom edges. If you look
> though an SLR with a fisheye or wide lens and pan the camera you will
> notice a curving, pinching effect taking place along the left and right
> edges, but vertically through the center the image is fairly stable and
> predictable.
>
> RDS

--
Glenn Barry Photography
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