Mamiya RB67 Pro-SD Auto extension tube No.2

Use this auto extension tube to take close-up photographs at a distance nearer than the shortest photographing range of the lens provided. Since the lens shutter and aperture are interlocked by the auto extension tube, close-up photography or copying can be simply obtained the same as when taking ordinary photographs.
There are two types, No. 1 and No. 2, for the auto extension tubes. The operating method is the same for both types, and they can be used in a combined condition.

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