Do not compare what you get back with Kodak 400 with much "slower" E200 film. The E200 will blow the 400 ASA film out of the water. That's becuase film ASA speed has nothing to do with low-light sensitivity during long time exposures. The "slower" E200 is MUCH better at long exposures while the faster Kodak 400 will be as slow as mud after a few minutes of exposure.