David Biederbeck shows how to create a Camera Rig for Cinema 4D that will allow you to create a Dolly Zoom or a Zolly move where the camera and automatically adjust the focal length by using some xPresso.
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Creating a Camera Distance focal length Rig in Cinema 4D
lesterbanks
3D, VFX, design, and typography. Twenty year veteran instructor in all things computer graphics.
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Lester, great work thanks!
I’ve posted a basic C4D project which uses the math behind a Zolly to automate the process a little more…adjusting focal length (slider for 16-300mm in the slider) will adjust Z position of the camera to the subject.
Perhaps someone more adept at Xpresso than me will add ports to account for objects at oblique angles to the subject.
http://dl.dropbox.com/u/42853598/PD_zolly1_basic.c4d.zip
enjoy, Pete