113.5 is very close, if my new tactic is correct.

Here's my new tactic - ask poser where the camera is.

poser.Scene().CurrentCamera().WorldDisplacement()

With my main camera dolly 0, 0, 0, and all rotations 0, 0, 0, it reports (in Poser Native Units)

(0.0, 0.0, 1.100000023841858)

Using the official Poser inch ratio (103.2) we get a z coordinate of 113.52000 (there are more decimal places, but I don't think we care)

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)