The 4-stop Pro Duo ND Filter by MOFAGE, featuring a 1.2 density, is crafted for the POCO filter adapter to effectively darken images. This allows for shooting with a wider aperture or slower shutter speed without risking overexposure. By adjusting exposure time or aperture, you can achieve greater control over depth of field and more effectively capture motion. As a neutral density filter, it doesn’t alter image colors, making it perfect for combining with other filters for creative flexibility.