Quote - ropeypopey: Actually there are a number of ways that poser cameras can be adjusted: Focal length,  Focus distance,  "F" stop,  Shutter open,  Shutter close, Yon and Hither

Agreed. But, and please correct me if I'm wrong, none of these will allow you to adjust for the lights.
My candidate would have been "F" stop but this doesn't lighten / darken anything.

    Focal length,  Focus distance,  "F" stop: -> Depth of Field;
    Shutter open,  Shutter close: -> Motion blur;
    Yon and Hither: -> Far and near cut-off planes in preview.

I just use a couple of tiny Python scripts that I wrote (Lights 10% up / down)

Rô

My favourite question is "Why?", my second favourite is "Why not?"