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โChanging Zooms to Scaling
Larger zooms should always remain as a zoom. On shots with smaller
zooms, sometimes customers want to eliminate the zoom in favor of using both horizontal and vertical scaling. That way a nominal lens focal length can be claimed, then fixed by the scaling parameter.
Tip: Moving the zoom to the HSCL track also allows you to use animate- on-keys mode for the zoom, rather than the noisier animate-by-frame behavior of zoom solving.
To eliminate the zoom:
1. On the solver panel, change the Lens setting from Zooming to Known.
2. Answer no, you donโt want to copy the solved FOV to the seed FOV.
3. Go to the first frame of the shot.
4. Select View/Show seed path.
5. Change the field of view value to an โofficialโ value you want to use,
some nice round number in the range of values that were solved.
6. Turn off View/Show seed path.
7. Change the HSCL parameter to Animate at keys mode.
8. Go to the beginning of the shot, click +Keys; repeatedly click next-key and +Keys so that HSCL has keys everywhere VSCL does.
9. Refine the solve.
Keep in mind that this process makes the changing aspect ratio a little harder to see, and the field of view changes harder to adjust since both HSCL and VSCL may need to be adjusted the same.
ยฉ2025 Boris FX, Inc.ย โย UNOFFICIALย โย Converted from original PDF.
