K9 Plano-Concave Lens D=40mm F=-500 ~ -160mm Uncoated / AR-Coated

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  The K9 Standard Precision Window has a variable diameter, ranging from 25mm to 50.8mm, and a 4mm thickness. Its λ/4 accuracy ensures high precision results. This window can be bought either with or without Anti-Reflective (AR) Coating to suit your specific needs.

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