calculating camera fov

[yourdaftpunk]

I've got a question about how indigo calculates Field of View. I can't seem to get Maya camera's into IR correctly.

Maya calculates its camera FOV with 'horizontal film aperture' or 'frame size' (this would be 'sensor width' in indigo I assume) as the first variable and 'focal length' as the second. So the basic formula says:

FOV = 2 * arctan (frame size/(focal length * 2))

When I input maya's settings into the formula, I get 54.4 degrees (which maya confirms).

When I input those settings into indigo (sensor width, sensor distance), I get a wider field of view it seems. Can anyone help?

-shawn

[arneoog]

I've tried to make that for MTI, but the 3DsMax way didn't work...

I would like to know how this works too