hi this is mostly a Motionbuilder issue but entirely related to the above script for cycling through Focal Lengths, so I wonder if anyone can help:
we have a camera set up in MoBu as follows:
HD, Fixed Ratio 2.39
35mm Full Aperture Film Format
Horizontal Aperture Mode
1.96 Film Width
2.67 Film Aspect Ratio
only problem is, when it's set to Horizontal Ap Mode, the script's Focal Lengths get multiplied by the Film Aspect Ratio (2.67).. obviously this is not useful, so one workaround is to set Focal Lengths in the script to numbers that are divided by 2.67...
however, Motionbuilder refuses to go lower than a 48 lens with this setup....? (and even then, the 48 lens is an incorrect value).
If the Ap Mode is set to Focal Length, the script works just fine but the image (camera optics) is incorrect (zoomed in)! We know this by comparing the image to that in Maya, where the Ap Mode is Horizontal... as it should be.
We're fudging it right now by setting a 35mm camera with a Film HEIGHT of 0.82 Inches.. it's very close to what we want, and allows the script to work but is not quite as it should be!
any ideas? I hope I explained it clearly!