Bill wrote:
> There was a thread recently about MZ-S data imprinting and whether it was > done at time of exposure or during rewind. I can now answer the question. > At work tonight, I put the MZ-S in our dark box, opened the back and removed > about half a roll. Stuck it in the film processor and when it exited, the > exposure data was where it was supposed to be. Therefore, the MZ-S imprints > the exposure data at the time of exposure. This can't be. I don't know what you did but what you describe is impossible. 1. The dataemitter led is a point source. Theres no row of emitters. Hence, it cannot print during exposure. Only during wind or rewind while the film is traveling. The dataemitter is on the right side of the pressure plate on the back (right side when the back is opened - left side of the film chamber) 2. The data cannot be imprinted during wind due to the fact that the dataimprinting emitter is placed on the left side of the shutter. This means that the emmitter is placed next to the next shot on the film not the one you are shooting. Ie. if dataimprinting was done upon winding data will be off with one frame on all frames; data for frame 12 would be imprinted on frame 13. The only way to make dataimprinting work upon wind and shooting is for the camera to have telephatic powers so that it knows the exposure before you make it! Imprinting can only happen on rewind. To put it clear: the film moves from left to right. The dataemmitter is to the left. This means that the film is transported past the emitter BEFORE the image is taken. Hence its impossible to imprint data during exposure or wind. 3. The dataimprinting during rewind is also proven on those cameras that had the over lapping frame syndrome. The overlapping frames did not have overlapping data imprinted something that would have happened if the imprinting followed the wind of the camera. The data was imprinted as it would be if the camera frames were correctly spaced. This could not have happened if data were imprinted on wind. 4. The Pentax MZ-S patens clearly state how the data is imprinted on rewind. That it use a sprocket hole counter and memory of exposure data deleted upon rewind of the film. 5. Theres no way possible to make dataimprinting between the sprocket holes upon exposure/wind without variable speed winding and/or uneven spacing between frames or very sophisticated sensor and emmitter software making sure you don't pint IN the holes not between them. Pål - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
