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How to convert Y-fov to FocalLength

Hello everybody,

we need to write an importer for CineCameras and the source would be cameras in .json format. Since the format of the in .json defined Cameras is different we are struggling to convert from y-fov to FocalLength.

Is there a function in or do you know the formula for it ?

Best Dominic

They’re not really related IMO.

I’m not sure how you would take an angle and turn it into a distance or lens length.

But a CineCamera has a read only H-Fov. So i guess that in relation to the aspect ratio you should be able to calculate it.