Circular Variable ND Filters
from Gurley Precision Instruments

Linear Adjustable Attenuation by Rotation, Variable Density Range from 0.0 to 4.0, Spectral Range: Optically Flat from 400nm to 700nm [See More]

  • Neutral Density Filter Type: Variable
  • Filter Diameter, Side Length, or Rectangular Length: 25 to 100
  • Filter Shape: Circular
  • Thickness: 1.52
Circular Linear Variable Density Filter -- 100FS01DV.1
from Newport Corporation

Antireflection coating on second surface to reduce back reflection [See More]

  • Neutral Density Filter Type: Variable
  • Filter Diameter, Side Length, or Rectangular Length: 100
  • Filter Shape: Circular
  • Thickness: 2
66.04
from Rolyn Optics Company

Coated filters unlike the absorption type get their useful qualities from one or more thin layers deposited on the surface of the substrate. There is frequently another coating or overlay applied to increase durability. Sandwich construction is frequently used which results in large thickness... [See More]

  • Neutral Density Filter Type: Variable
  • Filter Diameter, Side Length, or Rectangular Length: 150
  • Filter Shape: Circular
  • Optical Density: 0.5000