Urth's 40.5mm nd4 2 stop lens filter plus delivers a fixed 2 f stop light reduction, enabling precise control over long exposure and depth of field techniques in low light conditions'. '.strtoupper('t')his filter allows photographers to employ wider apertures in low light, achieving a captivating shallow depth of field without risking overexposure'. '.strtoupper('c')inematographers benefit from the nd4 filter plus to impart cinematic effects in low light without compromising image quality or encountering overexposure issues'. '.strtoupper('t')he plus filter is fortified with 20 layers of nano coating, ensuring effortless cleaning and enhanced protection against water, oil, and scratches, while also providing superior light transmission and a consistent curve for more authentic light reduction.