Yeah it's internal, it's not within my duties, but is covered under "Any other duties as required". Though yes I do use a camera on occasion in my role, the subject and context of the photo is such that I don't think it's that much different than if they'd asked the Dean of the school to do it. It'd be any other duties for her too.
Worst case scenario I take a day off work in lieu of overtime.
When it comes to the stock photos, I've been very careful the last few years. Pretty much all the ones I sell are taken in my own time with my own equipment. I was made aware of the contract that any photos taken during working hours, no matter what the subject etc, are joint copyright with the university.
I'm not fussed about calling their bluff, though the professor who wanted me to take the photos talked to me yesterday and sounds pretty gobsmacked about how the school is handling it. As she said, they needed the photo at short notice as they were falling behind the "in house" media team (basically a consultancy from the media school) would have charged thousands for it. I saved the school a lot of money and got the job done in half the time it would have taken had they gone down the apparent "preferred" route.
Just yet another example of the crazy inner workings I guess. Another good one is that we were told we couldn't buy a piece of equipment because it cost £500, we didn't have enough money to buy it so we'd need to find one that cost over £1000 so it could go through a different purchasing system