I shoot mainly in the upper midwest where your equipment will actually frost over when you come in from a long outdoor winter shoot. To avoid this, I put my entire LF backpack in a plastic bag and allow it to warm up before unpacking it.

Among the many problems this condensation could cause, I worry about lens fungus. To be truthful, I don't know anything about lens fungus, except that I don't want it!

  • What conditions cause it to form?
  • Where on the lens does it usually form?
  • What does it look like?
  • What is the best way to prevent it?
  • Are there any authoratative articles or literature on the subject?