Yes. "The photographer" means any and every photographer in this context. It's correct grammar.
"Photoshop is a great tool for the digital photographer" would be another use of the same construction, and few would believe that means just one photographer.
I'm fine with it however Bob chooses it to be. However, "The Photographer's" come across wrong to me, as it comes across as Bob's (The photographer) Foundation. While I'm perfectly fine with that, "The Photographers'" comes across as more all inclusive, a group thingy, which I think is more the intent of how it's set up. Grammatically correct or not, it just looks wrong and against the idea it was set up under. To me of course.
And I think your example is not a good one. "Great tool for the digital photographer" is obvious; "The Photographer's Foundation" is ambiguous and required an explanation.
But it's Bob's baby, he's British, maybe what we call upper crust British, I'm just a dumbass Canadian who spends his time saying "eh" So what do I know? :) :)
1985 was when I started work in London at the National Audit Office. On my first day I found this book dumped in a cupboard. It was called "Voices from the sky;: Previews of the coming space age" by someone called Arthur C Clarke. Inside was a handwritten dedication "To the Exchequer and Audit Department [former name of the NAO] whose working arrangements allowed me plenty of time to work on these ideas". Clarke "worked" as an auditor at the E&AD. I've thought of that book often, and wanted to swipe it as no one cared about it, but alas someone got there first (or it went into a skip).
VAT was administered by Customs&excise, not the Revenue.