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Alstar 1.25' Narrowband H-Beta Filter

5.0 Write Review
Free shipping on orders over $29.99

$69.99

$ 31 .99 $31.99

In Stock

About this item

  • 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 percent and completely rejects light pollution
  • Filter with metal mount 1.25 inch filter threads on both sides


Product Description

Freedom to Choose

Function Point 1

1.25" filter threads on both sides.

Function Point 1

1.25" filter threads on both sides.

Function Point 1

1.25" filter threads on both sides.

Function Point 2

Enhances the contrast between object and sky.

Function Point 2

Rejecting light pollution.

Function Point 2

Blocks virtually all other visible wavelengths of light.


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