Hey all.. My photo class is getting ready for World Pinhole Day and the idea was to do something from scratch using found materials and such... I'm using a standard size copy paper box with a hole I poked my self with a pin. I forget the actual size but our teacher mentioned its a pretty standard size needle for pinholes. Its all sanded down and ready to go. Here are my questions. I'm going to be using Arista or Ilford RC for my exposures. I have some comps in mind already... I'm thinking 4-5pm landscapes to try and grab those awesome shadows... Do you think I'm looking 5-10 minutes in that kind of daylight? Also, If I wanted to leave a similar box in the middle of a field for like 6 hours do you think I could catch star trails at night?