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Dual Narrowband D-OH1、D-OH2 Filter (Glow-Free),Astronomy Filter, 2'' (D-OH01) in Saudi Arabia Dual Narrowband D-OH1、D-OH2 Filter (Glow-Free),Astronomy Filter, 2'' (D-OH01) in Saudi Arabia

Dual Narrowband D-OH1、D-OH2 Filter (Glow-Free),Astronomy Filter, 2'' (D-OH01)

SAR 1,102
Brand
Generic
Category
Telescopes
Weight
199 g
SizeD-OH01
– 1 +

Special Features

  • FWHM 5nm;FWHM 40/20nm
  • Optical Glass
  • PVD/IAD coating for durability and resistance to scratching, as well as stability on CWL (central wavelength). No deviation from temperature change.
  • Constant stringent quality testing processes - Each filter is tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure each filter is a high-quality product

Description

The wavelength of Hydrogen-beta (Hβ) is 486.1 nm, and the wavelengths of Oiii are 495.9 nm and 500.7 nm. To achieve high transmittance for these two elements, the bandwidth of the channel must cover the wavelength difference between them. Considering that Oiii has a dual-peak bandwidth, the channel bandwidth is set to a wider 30 nm.

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