It is 100% there.

It’s legal because of the 16th amendment.

No, more like the differences in lenses, how they pull focus, the light they let in and f stop for the shutter.

The film Matters too, but since OP specifically asked about vintage equipment, film was a given

Army of the Dead has a super small focal point due to the lenses JJ Abrams used and it is a noticeable affect all through the movie.