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Mamiya RB67 Dual-Orientation 645 Viewfinder Mask
Frame 645 accurately without giving up the RB67’s revolving-back advantage.
This newly manufactured viewfinder mask is designed for photographers using a 645 film back with the Mamiya RB67. It provides clear framing guides for the smaller 645 image area while allowing you to compose in both horizontal and vertical orientations without removing or repositioning the mask.
The unique cross-shaped, dual-orientation design displays both 645 framing areas simultaneously. Simply compose using the appropriate frame, rotate the RB67 back, and keep shooting.
Features:
* Designed for the Mamiya RB67
* Provides 645-format framing guides
* Horizontal and vertical framing visible simultaneously
* No need to remove or rotate the mask when changing orientation
* Takes full advantage of the RB67’s revolving-back design
* Installs at the viewfinder/ground-glass area for an immediate visual framing reference
* 3D printed for a precise, lightweight fit
* Finished in Black to minimize distraction while composing
* Newly manufactured accessory — not used or salvaged
One mask. Both orientations.
Traditional framing masks can require repositioning when switching between portrait and landscape orientation. This design eliminates that extra step. Rotate the back as Mamiya intended, select the corresponding frame in the finder, and compose.
The RB67 remains one of the great modular medium-format camera systems. Accessories like this make it easier to combine that classic system with alternative film formats while preserving the deliberate shooting experience that makes the RB67 special.
Manufactured by Anderson Island Films as part of our effort to keep classic photographic equipment useful, adaptable, and in circulation.
Please note: This is a newly manufactured aftermarket accessory and is not an original Mamiya/OEM component. Camera, film back, viewfinder, and other equipment shown in photographs, if applicable, are for demonstration purposes and are not included.
