okay people...i really need some help here. i have a zeiss ikon nettar 515/2 in mint condition. it belonged to my grandfather and he kept EVERYTHING he owned in mint conditon. i have the viewfinder and camera opened, but i don't know where to go from there. any help would be very appreciated. i was very excited to find out that i could purchase film for this camera. and i'm excited to figure out how it works. i don't know a lot about photography, so give me the idiot's guide, please.