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Alstar 1.25" Narrowband H-Beta Filter

KWD 28
Brand
A ALSTAR
Category
Telescopes
– 1 +

Special Features

  • Substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface.
  • Have extremely high transmissions, while completely rejecting light pollution as well as the important blocking of longer wavelengths.
  • The high optical quality of the Alstar filters guarantees no loss in sharpness or contrast.
  • Executes with a transmission of over 90% and completely rejects light pollution.
  • Filter with metal mount 1.25" filter threads on both sides.

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