Camera Bokeh Anisotropy Math

[White Wizard]

What is the math behind the bokeh anisotropy? Does the value -0.5 correlate to 2x anamorphic?

[White Wizard]

-0.5 doesn't seem to match my anamorphic footage very well. -0.35 seems a bit closer.

Would love an official answer on what the values represent since the documentation doesn't specify.

[vlado]

If you want the ratio of the height to width of the bokeh to be k:1, then the value for anisotropy should be sqrt(1/k)-1; for anamorphic bokeh which is 2.39:1, the anisotropy should be -0.353 which is about what you found out.

Best regards,
Vlado

[White Wizard]

Awesome. Thank you.

I'm sure it would be helpful for others if that information was included in the online documentation.

[vlado]

Yes, will add it there.

Best regards,
Vlado