Mamiya RB67 645 Viewfinder Mask

Mamiya RB67 645 Viewfinder Mask

thingiverse

Framing mask for use with the Mamiya RB67 645 roll film back. Simply print and drop in over the ground glass viewfinder to aid in composing with the 6 x 4.5 aspect ratio. The little nubbins are there simply to make it easier to remove the mask from the viewfinder. Note: you do need the 645 film back to shoot 6x4.5. This is ONLY a framing mask to aid in composition. It does not change your film aspect ratio.

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