Can I image with the PST?

If you're planning on using an afocal projection (eyepiece projection) setup with a fixed-lens digital camera and can focus the eyepiece there should be no problem.

Prime-focus digital SLR cameras are another matter. The internal focusing mechanism has a limited amount of accommodation and in these configurations it will be far more difficult to reach focus. This may also be true of webcams depending on individual adapters and cameras.