The H-K9L premium optical glass construction ensures exceptional clarity and minimal distortion for superior images. Available in different sizes (12.5mm, 25mm and 50x50mm) to adapt to various photographic and optical applications. The optical density range of 0.1 to 1.0 allows precise light control, making it ideal for long exposure photographs and reducing reflections. Designed for a wide range of application wavelengths of 400-1100nm, perfect for filtering both visible and near-infrared light. Each filter is meticulously crafted with wavefront transmission error of λ/4@633nm and a dimensional error of +0.0/-0.1mm for consistent performance.
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