[ptx] HFOV, focal distance...

[Hal V Engel]

On Friday 03 June 2005 02:55 am, Bruno Postle wrote:
> The fov, a, b & c parameters are fairly consistent between shots
> with the same camera/lens combination so you can use them again and
> again.  Though they can vary depending on the aperture size and the
> focus distance, so I tend to recalculate them for every stitch.

My understanding is that aperture size does not affect these distortion 
numbers.  So for a given zoom lens all you need to be concerned about is 
focal length.