Most professional PTZs are speeddomes, which are designed to 'look' down, with the imager / lens built into the bottom part of the unit, like so:
By contrast, a member has asked for recommendations of PTZs that can 'look' up like towards the top of a building, bridge, etc. Sometimes, they are called positioners or turret cameras (see our Pan Tilt Positioner Tutorial). Here's an example of what one looks like, notice it is designed so that the camera unit can turn upward:
Specifically, the member is looking for 10x optical / 20mm minimum focal length, so this means consumer ones are obviously out.
In the old days, I remember people using RVision but I am not sure what improvements they have made in years. I also recall Cohu having some units, though they are likely pricey. Any experience with either of those or other units? What would you suggest?