The present invention relates to a method for positioning a cutting knife of a microtome or ultramicrotome equipped with motors for moving the cutting knife. The encoder encodes twenty eight bits of LVDS signals to thirty bits of TMDS signals. Concrete or another hardenable composition may fill these pockets to secure the inlet in position. The apparatus can also include an antenna to read a plurality of radio frequency identification tags, e. Thereby, although an amount of emission slightly decreases compared to the case where the entrance facet is arranged on the basis of the bright spot, emission with a reduced variation in luminance is obtained to enable photographing with a substantially uniform amount of exposure, while preventing possible flickers. The method includes the step of illuminating film with a light source while the film has developing chemical applied thereto, the film comprising at least two edges along an x direction perpendicular to a y direction parallel to a surface of the film.