High quality optical H-K9L glass construction provides exceptional clarity and minimal distortion for a superb image. Available in several sizes (12.5mm, 25mm and 50x50mm) for various photographic and optical applications. The optical density range from 0.1 to 1.0 allows precise light control, making it ideal for long exposure shooting and reducing glare. Designed for a wide application wavelength range of 400-1100nm, perfect for filtering visible and near-infrared light. Each filter is carefully crafted and has a wavefront transmission error of λ/4 at 633nm and dimension error of +0.0/-0.1mm to ensure consistent performance.
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