One point I'd like to make, and not in response to anything said in this thread so far, but in response to things I've read in other threads, so I want to kill it before it comes up again:

With respect to the actual render, all of Poser's perspective cameras are identical. Any perceived difference between these is either imagined, due to misunderstanding, or failure to put two cameras in the exact same position and orientation.

The most commonly used perspective cameras are: Main, Aux, Posing, Dolly, Face, etc. There is no visual difference among these.

They differ in how they move when you use the various tools to move them. They differ in what they are parented to and therefore how they move when other things move.

They do not differ in magnification, field of view, perspective, distortion, focal blur, or motion blur.

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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)