We were in Ocean Pointe in 2005, and scheduled a photographer via the activities center. The photographer was fantastic, and the photos were incredible. We still treasure them. I think it was a 3'rd party photographer who billed through the resort, but we still attribute the experience to "The Marriott Experience".
I didn't see any such arrangement at Manor Club.
When we were at OceanWatch this past summer, we looked for a photographer in the AMAZE area... nothing. We looked for info in the literature in the room..... nothing. After a preview, on our way out the door, in an empty hallway in the reception area, was an empty desk and a monitor advertising beach-side photographs.
It was too late for us, but OceanWatch does promote an area photographer for beach photos, but we didn't have an opportunity to try them, so I can't vouch for them. As far as being associated with the activities center, though, it doesn't appear that they are.