Photo Taking Session
The photograher will take the photos and make sure the customer is satisfied, then share photographerID and possibly page number (1page = 10 photos) of the photos (i.e: details of how to find photos and by what time).
Photographer/Customer Registration
All users should register and login as either photographer/customer. Photographers get ID after login. Customers use photographerID, page number and date to search, preview and purchase photos.