Don't know anything about Aston, but in Bryce (as said above) just select any camera except the main one; that'll put the main cam into view (if you can't see it, hit the "-" key a few times til it appears).
Select it and hit "A" for attributes. There's a FOV control there.
Warning. This work in precisely the opposite way to a camera's "Focal length". So the smaller the FOV the greater the Focal length. The smaller the FOV (greater Focal length) the flatter the perspective (unless you're going for fish-eye efects, in which case vice-versa...)

Having changed the FOV, move the Cam so that the "sight" lines cover the part of the scene you want to render...

Hope that helps...

Cheers,
Diolma

Message edited on: 01/25/2005 16:25