H-K9L premium optical glass construction ensures superior clarity and durability for exceptional optical performance. Versatile application wavelength range from 400 to 1100nm, making it ideal for various photographic and optical experiments. Precise optical density range from 0.1 to 1.0, allowing precise light control and exposure adjustments in your projects. Compact size of 12.5mm or 25mm diameter and size 50mm x 50mm, perfect for fitting various optical configurations and equipment. Each filter is meticulously designed with wavelength transmission error of λ/4 to 633nm and +0.0/-0.1mm dimensional error for reliable and consistent results.
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