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Circular 2-inch astronomy filter with clear neodymium glass in black metal frame

Baader Planetarium

Baader Planetarium 2" Moon & Skyglow Filter Neodymium Glass

SKU CH-X5W6-7VEC8

Enhances lunar and planetary contrast while reducing light-pollution glare using Neodymium glass in a 2" mount

  • Boosts lunar and planetary contrast by selectively blocking unwanted light
  • Reduces glare and scattered light for longer, more comfortable observing sessions
  • Enhances color vibrancy and detail through Neodymium glass RGB enhancement
  • Cuts specific streetlight and skyglow wavelengths to improve astrophotography in light-polluted areas
  • Maintains natural colors while increasing contrast with optically polished Neodymium-doped glass

Essential 2" Contrast Filter

The Baader Planetarium Moon & Skyglow Filter is a 2-inch optical filter designed for astronomical telescopes. It uses Neodymium-doped glass to boost contrast and reduce glare during lunar and planetary observation. Astrophotographers and visual observers use it to reveal subtle surface details that are otherwise lost in bright sky conditions. The filter threads into standard 2-inch eyepiece barrels and diagonals.

Neodymium RGB Enhancement

The defining specification is the custom Neodymium glass substrate, exclusively melted for Baader Planetarium. This material selectively transmits the red, green, and blue spectral regions while blocking wavelengths from common streetlights and natural skyglow. The result is enhanced planetary contrast and improved color vibrancy without an artificial color cast. Optically polished surfaces preserve the telescope's native resolution.

Cool Running Passive Optic

As a solid glass filter, it draws zero power and generates no heat or electronic noise during operation. The unit adds negligible thermal mass to the optical train, preventing localized air currents that could degrade seeing. Its durable substrate resists dew formation longer than thin-film coatings, supporting extended sessions in humid conditions. No active cooling or power supply is required.

Highlights

  • Boosts lunar and planetary contrast by selectively blocking unwanted light
  • Reduces glare and scattered light for longer, more comfortable observing sessions
  • Enhances color vibrancy and detail through Neodymium glass RGB enhancement
  • Cuts specific streetlight and skyglow wavelengths to improve astrophotography in light-polluted areas
  • Maintains natural colors while increasing contrast with optically polished Neodymium-doped glass

Specifications

No published specifications for this item yet.

Questions about this item

How does the Neodymium glass affect the view through the telescope?

The Neodymium glass selectively blocks specific wavelengths from streetlights and skyglow while transmitting red, green and blue regions, increasing planetary contrast and colour vibrancy without shifting natural hues.

What filter thread does the 2 inch size use and what does it fit?

It has a standard 2 inch filter thread that screws directly into any 2 inch eyepiece, diagonal or camera nosepiece with the same thread.

What are the physical dimensions and mounting requirements?

The filter is a 2 inch diameter round glass cell with an optically polished substrate housed in a threaded metal ring for direct screw-in mounting.

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