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

Technical Specs

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