0.4 OD, 22mm CA, C-Mount Absorptive ND Filter

Product Details Specifications General Type: Neutral Density Filter Filter Included: #46-213 Physical & Mechanical Properties Clear Aperture CA (mm): 22.0 Thickness (mm): 2.50 ±0.5 Parallelism (mm): <0.02 Total Length (mm): 20.3 Extension Length (mm): 16.3 Optical Properties Optical Density OD (Average): 0.4 ±0.05 Glass/Filter Number: Hoya ND40 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More ND Filter Glass Coating: Uncoated Index of Refraction (n d ): 1.50 Surface Quality: 80-50 Transmission (%): 40 (average) Blocking Wavelength Range (nm): 400 - 700 Threading & Mounting Thread Type: C-Mount Mount Diameter (mm): 30.0 Mount Included: #56-353 Material Properties Transformation Temperature (°C): 525 Regulatory Compliance Certificate of Conformance: View ×