Zero Image 6x18 with filter adapter

Hi, I'm interested in investing in the 6x18 but I wonder if someone used it with the filter adapter. I've the LEE 52 wide angle adapter and I wonder if this would cause vignetting with the 6x18.

It looks like Zero Image can't install both filter adapter with the shutter release adapter but that's okay cause I'm mainly landscape

Write directly to (Mr.) Zernike Au, the manufacturer. He would have used this camera, like all other cameras he manufactures, and can give you the definitive answer on vignetting. I suspect there would be normal vignetting for such a wide pinhole.

I would not use acrylic filters on any pinhole camera.

Why not discard the holder and simply BluTac the filter directly above the hole? You could still use the sliding shutter if you off-set the filter a bit.