[MF3D.FORUM:66] Re: diagonals

[Richard Rylander <rlrylander@xxxxxxx>]

Tloc54452@xxxxxxx wrote:

> Diagonals can lead you astray if the foramt is far from square.
> For instance, a 24x80 panoramic has a diagonal of 83 but so does
> a format which is 59 square.  You might say that 24x80 has 1920
> square mm of viewing area while the 59x59 has 3481 but it's worse
> that that: a lot of the 24x80 panoramic is viewed at quite a slant
> so the outer edges don't count as much.  I think the way to gauge
> formats is going to be by solid angle but I don't know how to
> figure it...yet.
>
> John B

How about solid angle divided by the aspect ratio of the format (always
expressed as a number >= 1 to avoid landscape/portrait mode confusion)?
This would favor square images over rectangular images of the same solid
angle.

Richard Rylander