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Forum: Pentax Medium Format
04-04-2015, 02:07 PM
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For mounting purposes, both tubes use white dots to align the flanges of the tubes with the lens mount. Not sure if the Autobellows has these dots. Both tubes have a small pin in the mounting face for turning the camera body, so that the camera orientation is rotated at 90, 180, 270 or 360 degrees correctly. These small pins are actually screws and they do come out and can be lost. I would guess that there were no more than 500 of these tube sets made.
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