I come from a film background so I’m more used to dealing with focal lengths than with FOV. How can I roughly estimate a focal length to FOV? Also does changing the FOV also change things like depth of field and depth of focus like on real lenses? I’m guessing not, but if my hunch is right, how do I adjust those things? Are those not built into unity camera stuff or do I need a plug in?
The camera in unity isn’t modelled optically. It’s basically just a matrix that defines how to map coordinates in a 3d world to a 2d screen surface. The field of view only affects where on your screen the objects in the world are drawn to.
If you want depth of field etc. those are separate effects done with shaders, post processing and such and those effects typically offer a way to adjust their parameters completely separately. Unity DoF