Schneider 4x4" Gold Solid Color # 2, Warming Effect Professional Glass Filter.

What sets the 4x4" Gold Solid Color #2, Warming Effect Professional Glass Filter apart is its ability to deliver an overall warming effect, ideal for capturing healthy skin tones and accentuating the vibrancy of foliage in your photography. Crafted by Schneider, a renowned brand in the photography industry, this filter is diamond-cut from crystal-clear, water-white optical glass. It is meticulously ground and polished to achieve precise flatness and plane-parallelism, ensuring an exact parallel relationship between the front and back filter surfaces.

Each Schneider filter undergoes rigorous testing to ensure perfection. A laser interferometer verifies the flatness and parallelism, while a densitometer checks for consistent density. Furthermore, a spectrophotometer tests for optimal light transmission. This meticulous attention to detail results in ultra-high consistency, enabling photographers and cinematographers to interchange filters mid-shoot without any discernible variation in color or effect.

The superior purity, color saturation, and repeatability of Schneider filters virtually eliminate the need for lab color timing correction. These filters are designed to withstand the most demanding conditions on set or location. Many of them feature Schneider's specially formulated hard anti-reflective (AR) coating, which resists flaking, peeling, and scratching. This proprietary coating also reduces light loss and flare to less than 1% per surface, a significant improvement over untreated glass, which has a light loss of 4% per surface.

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

Contrary to the common perception that filters should not be used in front of long length lenses due to the critically short depth of field, Schneider filters are an exception. They can be used with even the longest lenses without any degradation of the image, thanks to the high-quality control, superior glass quality, and advanced glass grinding and polishing techniques employed in their manufacture.