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Infrared ND Filter Set, Metallic, Germanium, 25.4 mm, Qty 5

  • Size
    Ø25.4 mm
  • Wavelength Range
    2000-5000 nm
  • Optical Density
    0.3, 0.6, 1.0, 2.0, 3.0
  • Material
    Optical Grade Germanium
  • Coating Type
    Vacuum deposited metal alloy
  • Size Tolerance
    ±0.2 mm
  • Surface Quality
    80-50 scratch-dig
  • Clear Aperture
    All but 1.5 mm outer rim
  • Parallelism
    3 to 5 arc min (0.8 to 1.5 mrad)