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ALPA viewfinder shift masks - with markings for shift, interchangeable and revolvable (vertical/horizontal), one mask per focal length/format.
When ordering a viewfinder mask, please let us know the format (6x9, 33x44, 40x54, e.g.), as well as the focal length or specific lens, you need this mask for. Standards mask feature only one format/lens combination. Shift masks add a scale indicating the movements. For custom made masks, please sketch a drawing. With this type, we can add up to three lenses/focal lengths but only for one specific format, as otherwise it overwhelmingly confusing.
