Assuming you mean the Mamiya Six folding camera, there are a lot of variations so maybe you should post a picture of the lens, but the most likely answer is no, you'll want a push on filter holder like a Series filter holder - probably Series VI - and a filter to fit. The push on holders come in various sizes to fit over the lens barrel. They are two-piece with a push-on ring and a retaining ring. You can get ones where the retaining ring is a lens hood, which is useful, as long as it doesn't make it harder to reach the shutter and aperture controls.