Pro8mm sells 100D and in fact used to make it for Wittner until he started making his own. It is cut from Kodak 5285 double super 8 film that we buy from Kodak. It is $30 for stock and processing. I usually suggest that you do not use the built in 85 filter in the camera since over time the plastic deteriorates. I would use an exteral 85 filter. Manuals for both the 814 and the 1014 are on our website at www.pro8mm.com and include some useful tips. Good luck!