Central Camera!   Tucked away at 230 S.  Wabash Avenue under the EL, it's a great camera shop with practically everything you could want. It's a narrow tunnel of a store that keeps going, and going, and going as you walk deeper into it. While they are on top of everything modern and digital, this is also the place to get your Holga's (I bought two during this visit) and re-spooled film in almost every format imaginable. I didn't sit down, but I rested my aching feet for a while, talking with Albert Flesch, the grandson of the founder of Central Camera. Aside from discussing aquariums and other subjects, I picked up a  camera bubble level and several rolls of Konica Impressa 50, along with the Holgas.   Its a great shop and any photographer who winds up in Chicago should check it out.