I've just exposed my first roll of film (Tmax 100) in my Zero Image 6X9 and was quite pleased with the exposures (proper density). I used an Olympus OM 2S with a 21mm lens as my viewfinder and a Pentax digital spot meter to determine exposure. Guess I had my feet firmly planted in three centuries. The question I have is if anyone is using filters with their pinhole cameras and if so, how might they be attaching them? Any advice is appreciated. Bill Barber