Schneider 4x4" White Frost # 1, Diffusion & Contrast Reducing Professional Glass Filter

A Schneider 4x4" White Frost #1 Diffusion & Contrast Reducing Professional Glass Filter is an essential tool for photographers and cinematographers seeking to subtly modify the mood or style of their images. These filters delicately flare highlights and slightly tone down contrast, all while maintaining the integrity of image resolution and color reproduction.

Each Schneider filter is meticulously crafted from crystal-clear, water-white optical glass. The glass is diamond cut, then ground and polished to achieve precise flatness and plane-parallelism, ensuring an exact parallel relationship between the front and back filter surfaces. This precision is confirmed by a laser interferometer, guaranteeing perfection in every filter.

Schneider filters are further tested with a densitometer for consistent density and a spectrophotometer for optimal light transmission. This rigorous quality control process results in an ultra-high consistency that enables cinematographers to interchange filters mid-shoot without any discernible variation in color or effect. The exceptional purity, color saturation, and repeatability of Schneider filters virtually eliminate the need for lab color timing correction.

Designed to withstand the most demanding conditions on set or location, many Schneider filters feature a specially formulated hard anti-reflective (AR) coating. This proprietary coating resists flaking, peeling, and scratching while reducing light loss and flare to less than 1% per surface. This is a significant improvement over untreated glass, which typically experiences a light loss of 4% per surface.

Schneider screw-on filters are equipped with virtually jam-proof brass precision mounting rings. Unmounted Schneider laminated filters are protected against delamination and edge-chipping by Schneider's unique Edge Seal, which also minimizes edge reflection and edge flare.

Unlike inferior filters that can degrade image quality when used with long lenses, Schneider filters maintain their performance even in front of the longest lens. These filters are diamond-cut from high-quality optical glass, then ground and polished to precise lens-making standards. This results in unsurpassed clarity, light transmission, and color saturation without any visible compromise of image quality. Even when stacked, Schneider filters remain the clear choice for any lens, reinforcing their position as a trusted tool for professional photographers and cinematographers.