The double-sided and multi-layer coating of the Pgytech filters protects the lens and enhances image clarity and color effects. The anti-reflective coating helps to reduce surface reflection and increase optical transmission. Multiple grinding and polishing processes, along with IAD (Ion Assisted Deposition) multi-layer technology, ensure high-resolution image quality.

CPL filters, also known as circular polarizers, are primarily used to eliminate unwanted reflections on non-metallic surfaces and increase color saturation. They also enhance the blue of the sky, highlight white clouds, improve image clarity, and create a more expressive and vibrant overall image. They are often used for shooting through glass or water as well.

Neutral density filters, also called gray or ND filters, extend exposure time and reduce the amount of light in very bright conditions, preventing overexposure. Additionally, the filter enhances the color saturation of the image, making it more transparent and vibrant. Special effects, such as water mist or light trails at night, can also be achieved with the filter. The ND8 filter is used on partially cloudy to slightly sunny days and reduces the shutter speed by 3 stops. The ND16 filter is used in very bright environments, such as in the desert or on snow, and reduces the shutter speed by 4 stops.