How exactly do photo collections work?

[dream_operator23]

I have made my first serious photographer and I am wondering about the photo collections. Are you supposed to keep every photo in a collection in your camera and then sell them all at once? Do you get more money for the collection than you would for the individual photos? Is there anyway to find out what all the pieces to a collection are or do you just have to point your camera everywhere and hope that a piece to the collection comes up? If you are supposed to sell the collection together, then I suppose it would make sense to only take pictures in the collection you are working on until it is done since cameras have limited space, right? Is there anyway to make the collection more valuable, like using different sizes and filters?

[el_flel]

The skill journal shows you each collection and what you need to photograph in order to complete it. You don't need to keep photos because once you've photographed something it's recorded in the skill journal so if you wish to delete it then you can. You get a monetary bonus for completing a collection. You've also got skill rewards like with the other skills, so you get a special perk once you've completed a certain number of collections, taken a certain amount of photos etc. The bigger the photograph the more it's worth, not sure if effect (b&w, sepia etc) increases value.