Ortho cameras and depth effects

[SonyBoy]

Am I right in thinking that an ortho camera by its nature cannot output depth-based effects such as depth of field and Z-depth passes?

Based on some simple tests this seems to be the case.

I have a situation where I want to render with an ortho view but need depth info. If this is a hard incompatibility I may have to settle for using a super long lens to get as close to ortho as I can.

[hermit.crab]

It does make sense since Ortho views are flat, so depth of field is not expected to work. However, Z-depth seems to yield different values based on distance from the camera - so I guess it's working. This happens both with the Camera overrides in the settings and from Maya's Camera (Orthographic active).