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Products / Optics / Optical Filters / Neutral Density (ND) Filters / Mounted Absorptive Neutral Density (ND) Filters
See all 40 Products in Family

0.9 OD M77.0 x 0.75, Mounted Absorptive ND Filter

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Stock #65-025
C$96.53
Qty 1-9
C$96.53
Qty 10+
C$85.05
Volume Pricing
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Clear Aperture CA (mm):
73.0
Filter Thread:
M77 x 0.75
Optical Density OD (Average):
0.9
Mount Diameter (mm):
80.0 +0/-0.2
Thickness with Mount (mm):
5.00
Surface Quality:
80-50
Transmission (%):
12.5
Type:
Mounted Imaging 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
Mount Thickness (mm):
3.8 ±0.1
Mount Thickness Including Threads (mm):
6.3
Note:
AR Coating: MgF2
Coating Specification:
Ravg ≤1.75% @ 400 - 700nm

Regulatory Compliance

RoHS:
Compliant
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Product Family Description

  • Spectrally Flat from 400-700nm
  • Homogeneous Glass: Blocks by Absorption
  • Light/Exposure Control for Imaging

Neutral Density (ND) filters appear gray in color and reduce the amount of light reaching the camera's sensor. Since the transmission value only varies over a small percent in the visible, there is no effect on color balance. Instead of just stopping down the lens aperture due to high light levels, ND filters allow for wider apertures which can be used to decrease the depth of field. This allows the important information to be separated from the background. Compared to polarizing filters, ND filters are ideal for overall light reduction in cases of extreme light intensity. By stacking filters, it is possible to achieve other Optical Density (OD) values. All mounted filters can be threaded together with identical male and female threads on each mount. 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-D x 100 = percent transmission.

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