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2.0 OD, 12mm CA, C-Mount Absorptive ND Filter

C-Mount Absorptive Neutral Density (ND) Filters

C-Mount Absorptive Neutral Density (ND) Filters

Stock #12-941
Qty 1-10
Qty 11+
Volume Pricing
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Filter Included:
Mount Included:
Clear Aperture CA (mm):
Optical Density OD (Average):
2.0 ±0.3
Extension Length (mm):
Total Length (mm):
Thread Type:
Glass/Filter Number:
Mount Diameter (mm):
Index of Refraction nd:
Surface Quality:
Transformation Temperature (°C):
Thickness (mm):
2.00 ±0.5
Transmission (%):
1 (average)
Neutral Density Filter
Blocking Wavelength Range (nm):
400 - 700
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
ND Filter Glass
Parallelism (mm):

Regulatory Compliance


Product Family Description

  • Pre-mounted in Engraved C-Mount Housings
  • Simplify Integration into Optical Systems
  • Optical Densities from 0.15 to 2.5
  • Also Available Unmounted

C-Mount Absorptive Neutral Density (ND) Filters are pre-mounted in C-Mount housings to simplify their integration into optical systems. Each housing is engraved with the stock number as well as the optical density of the filter for easy identification. ND filters with optical densities ranging from 0.1 to 2.5 are available. C-Mount Absorptive Neutral Density (ND) Filters are ideal for exposure control in imaging applications and in light control applications for measuring instruments. Please contact us if your application requires a custom C-Mount Absorptive Neutral Density (ND) Filter with one of our standard Absorptive ND Filters.

Filter Simulation Software

Click here to download HOYA’s colored glass filter simulation software which can be used to calculate the internal transmittance and external transmission of each HOYA glass type. The software can simulate the performance of individual filters with user specified thickness.