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All Products / Optics / Optical Filters / Neutral Density (ND) Filters / M25.5 and M30.5 Mounted Neutral Density Filters
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

400-700nm OD 0.5, M25.5 x 0.5 Absorptive ND Filter

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Stock #66-704 3-4 days
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£66.30
Qty 1-9
£66.30
Qty 10+
£61.88
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Diameter (mm):
28.00
Optical Density OD (Average):
0.5
Clear Aperture CA (mm):
22.0
Filter Thread:
M25.5 x 0.50
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
ND Filter Glass
Coating:
Uncoated
Transmission (%):
32.00
Type:
Neutral Density Filter
Stock No. of Unmounted Filter:
#48-089
Mount Thickness (mm):
9.9
Wavelength Range (nm):
400 - 700

Regulatory Compliance

RoHS:
Exempt
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Certificate of Conformance:
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Product Family Description

  • VIS and NIR ND Filters, Mounted for Imaging Lenses
  • Variety of Optical Densities
  • Stack Filters Together for Custom Transmission Profiles

Our TECHSPEC® Absorptive Neutral Density Filters and TECHSPEC® NIR Non-Reflective Neutral Density Filters are now available in M25.5 and M30.5 mounts for imaging lenses. Neutral Density (ND) filters are useful for limiting the amount of light that reaches the sensor of a camera. Using ND filters rather than the iris of your lens allows the imaging system to limit the depth of field of the image, eliminating parallax errors and other image artifacts that may limit the usefulness of your machine vision software.

We have specially designed our mounts to hold filters up to 6.5mm in thickness, allowing the user to stack multiple ND filters together to create custom transmission filters. Optical Densities are additive, meaning a filter stack of a 0.4 OD filter and a 1.3 OD filter will produce a 1.7 Optical Density.