Horatio, yes, Sirius sums it up very well. Given that the time that it is in your hands and being held up to your eye, the extra weight probably matters only a little if at all. If fact its extra weight may be a help in terms of balance and steadiness. However if your style means that it will spend several hours around your neck without any other support then it depends on the strength of your neck muscles in terms of how much of a burden it becomes
With a P645N which may be just a shade heavier than a F5 , I have managed a "wander round" a wedding or "stately house" for an hour or so taking shots as a guest.visitor but that was with a wide Optech strap. On an all-day hike I'd want either a chest harness for the P645N or the ability to place it over one shoulder without it swinging about or interfering with my walking if I needed it at a few seconds notice. Alternatively I'd want to use a backpack
However that's me and not you. That's the perennial problem when listing reasons why or reasons why not, It is expressing what suits the respondent and not necessarily the person asking the for the list of good and bad points in the ownership of X camera.
pentaxuser