if your buying a high level pole and intend to use it for solar panels and velux on roofs i wouldnt bother with this pole as itll be far too bendy at full stretch at angles, catching on the gutters unless your poling with the pole above your head.very uncomfortable and added strain to your arms and shoulders.
it would be ok straight up on 4 storey windows for example but on angles id go for the extreme 47.much more rigid and lighter to boot.velux and solar panels are much easier to clean with an extreme.