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4 OD 25mm Dia, Absorptive ND Filter

Stock #36-273
S$60.45
×
Qty 1-10
S$60.45
Qty 11+
S$54.41
Volume Pricing
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Coating:
Uncoated
Diameter (mm):
25.00
Thickness Tolerance (mm):
±0.5
Glass/Filter Number:
Optical Density OD (Average):
4.00 ±0.2
Index of Refraction nd:
1.531
Surface Quality:
80-50
Transformation Temperature (°C):
542.00
Thickness (mm):
2.85
Transmission (%):
0.01 (average)
Type:
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
Dimensional Tolerance (mm):
±0.1
Parallelism (mm):
<0.02

Regulatory Compliance

RoHS 2015:
REACH 201:

Product Family Description

  • Attenuates Visible Light Via Absorption, Rather than Reflection
  • Multiple Filters Can be Stacked for Increased Blocking
  • Optical Densities from 0.1 to 4.0 are Available
  • Also Available Pre-mounted in C-Mount Housings

These filters possess level spectral transmittance characteristics in the visible region and attenuate light by absorption with minimal reflection. Typically, neutrality and density of absorptive filters are a function of the material and the thickness. Since Hoya neutral density filters are held to a specific optical density, the thickness is only a function of the glass type. They are useful in light control applications for measuring instruments and exposure control in imaging. Spectral variations occur as optical density increases.

Optical Density exhibits an additive relationship; for example, stacking filters with OD values of 0.6 and 0.9 yields a resultant density of 1.5. The optical density is related to the transmission by the following equation: T = 10^-OD x 100 = percent transmission.

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.

Absorptive Neutral Density Filter Kits

#55-222 includes 6 filters in optical density values of 0.15, 0.3, 0.4, 0.6, 0.9 and 2.5. Wooden Box with foam lining included.

#63-468, #63-469, #63-470 and #66-155 each include 14 filters in optical density values of 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.9, 1.0, 1.3, 1.5, 2.0 and 2.5. Please note that OD 3.0 is the only one not included in these kits. Wooden Box with foam lining included.

Title  Compare Stock Number  Price Buy
25.0/25.4mm Optic Dia., Precision Gimbal Mount #54-999 S$398.74
Qty 5+ S$359.21 Request Quote
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8.0 - 118.0 Optic Height, English Bar-Type Optic Holder #03-666 S$147.64
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7.0 - 67.0 Optic Height, English Bar-Type Optic Holder #03-669 S$141.44
Qty 10+ S$127.49 Request Quote
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7.0 - 40.0 Optic Height, English Bar-Type Optic Holder #03-676 S$131.75
Qty 10+ S$118.58 Request Quote
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5.0 - 25.0mm Optic Height, Metric Bar-Type Optic Holder #55-529 S$131.75
Qty 10+ S$118.58 Request Quote
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10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder #55-530 S$141.44
Qty 10+ S$127.49 Request Quote
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2.0 - 35.0mm Optic Dia., Three-Screw Adjustable Ring Mount #03-668 S$79.05
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19.5 - 108.0mm Optic Dia., Three-Screw Adjustable Ring Mount #03-670 S$134.46
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9.5 - 73.0mm Optic Dia., Three-Screw Adjustable Ring Mount #36-605 S$98.81
Qty 10+ S$89.13 Request Quote
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25.0/25.4mm Optic Dia., Optical Cell Assembly #36-461 S$122.06
Qty 10+ S$110.05 Request Quote
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25.0/25.4mm Optic Dia., Kinematic Mount, 2-Screws #58-851 S$153.45
Qty 5+ S$138.34 Request Quote
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25.0/25.4mm Optic Dia., Kinematic Mount, 3-Screws #58-854 S$168.95
Qty 5+ S$152.29 Request Quote
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25.0mm Optic Dia., Optic Mount #64-560 S$59.29
Qty 10+ S$53.48 Request Quote
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25.0/25.4mm Optic Dia., L-Slot Direct Mount #36-410 S$83.70 Request Quote
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25.0/25.4mm Optic Dia., L-Slot and Rotation Direct Mount #36-411 S$122.45 Request Quote
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25.0/25.4mm Optic Dia., Side Flange Direct Mount #36-414 S$83.70 Request Quote
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25.0/25.4mm Optic Dia., SM1 Thin Mount, M4 #13-787 S$24.80 Request Quote
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25.0/25.4mm Optic Dia., SM1 Thin Mount, 8-32 #13-788 S$24.80 Request Quote
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25.0/25.4mm Optic Dia., 5 Axes Optical Mount #13-776 S$575.05
Qty 5+ S$546.38 Request Quote
  • 3-5 days
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25.0/25.4mm Optic Dia., X-Y Translating Optic Mount #62-956 S$349.14
Qty 5+ S$331.70 Request Quote
  • 3-5 days
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25.0/25.4mm Optic Dia., X-Y-Z Translating Optic Mount #62-959 S$686.26
Qty 5+ S$617.68 Request Quote
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4.0 - 36.0mm Optic Dia., Self-Centering Jaw Clamp #16-077 New
×
S$201.50
Qty 5+ S$181.35 Request Quote
  • 3-5 days
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5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp #16-078 New
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S$527.00
Qty 5+ S$474.30 Request Quote
  • 3-5 days
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25.0/25.4mm Optic Dia., E-Series Kinematic Mount #15-866 New
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S$60.45
Qty 10+ S$57.35 Request Quote
  • 3-5 days
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