This 3-way pan-tilt head gets great reviews, and is supposed to be very smooth, but it only has a -15, +90 degree tilt angle. -15 degrees doesn't seem suffient for many types of shots, e.g., a bird in a tree. Has anybody tried turning the camera around backward on this head to shoot at a higher angle than 15 degrees? If so, does the tilt handle get in the way of a long lens, or show up in the photo with a short lens? Is the pan/tilt motion smooth enough to be able to follow action while shooting continuously? Thanks for your help!