I've noticed that zenphoto doesn't provide a way to' make a direct link between a single Photo and a multiple choice of categories.
Am i right? Let me explain:
if i upload my black and white cat photo and i've got two categories named 'pet' and 'black and white' can i link my photo to' both categories without having a duplication of it?
I Find that a duplication makes any change to a photo quite unconfortable to do. Infact if i want to change a photo's detail i have to remember in which categories all copies of that photo Are.
Another thing that makes me doubtful is that having a duplication of a Photo means occupying memory and place on the site that could be' usable for other photos. So is it or Will it be possible to' make links between Photos and a number of different categories with zeta photo?
Thanks you
Bye bye
Bogomips

No, that will not be possible as the concept of Zenphoto is file system based and works therefore with fixed albums (what you called "categories") that display that file system order.

You can however use tags and/or dynamic albums to achieve what you have in mind.