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Baader 2 inch Neutral Density 1.8 multicoated filter in metal cell

Baader Planetarium

Baader Planetarium 2" Neutral Density 1.8 Multicoated Filter optic

SKU CH-VJJZ-9CAK8

A 2" multicoated neutral-density filter with 1.8 optical density and 5.08 cm thread for controlling light intensity on bright celestial objects

  • Neutral Density 1.8 cuts glare for sharper lunar and planetary views
  • Multicoated optics maximise light transmission with minimal loss
  • Standard 2" / 5.08 cm thread fits securely and prevents vignetting
  • Controls light intensity to reveal subtle surface details on bright objects
  • Durable 2" cell construction ensures consistent long-term performance

Neutral Density 1.8 Filter

The Baader Planetarium 2" Neutral Density 1.8 Multicoated Filter is an optical accessory that threads onto a standard 2" / 5.08 cm telescope or camera interface. It reduces incoming light to lower glare and boost contrast during observation or imaging. Multicoated optics preserve transmission while controlling brightness. The sturdy cell ensures secure, repeatable attachment.

Visual observers and imagers

Observers targeting the Moon, planets or other bright objects benefit from the density reduction that reveals subtle surface detail. Photographers gain flexibility to use wider apertures or slower shutter speeds for motion effects in daylight. Buyers who need a different optical density or a filter size other than 2" should look elsewhere.

Optical density 1.8

The single specification that decides fit is the neutral density value of 1.8, which determines how much light the filter transmits. This fixed density sets the exposure reduction and contrast improvement for a given scene. Confirm that 1.8 matches the attenuation required for your target and equipment before purchase.

Highlights

  • Neutral Density 1.8 cuts glare for sharper lunar and planetary views
  • Multicoated optics maximise light transmission with minimal loss
  • Standard 2" / 5.08 cm thread fits securely and prevents vignetting
  • Controls light intensity to reveal subtle surface details on bright objects
  • Durable 2" cell construction ensures consistent long-term performance

Specifications

No published specifications for this item yet.

Questions about this item

How do I attach the 2" 5.08 cm threaded filter without cross-threading the cell?

Align the filter squarely with the eyepiece or camera nosepiece threads, turn gently clockwise until resistance is felt, then tighten only until snug; forcing it strips the fine aluminium threads.

Will the multicoated surfaces degrade and need re-coating or replacement?

The hard multicoating is permanent; clean only with a puffer brush and optical fluid on a lint-free cloth — no re-coating is ever required.

At what point does the ND 1.8 density limit exposure control in bright daylight?

ND 1.8 cuts roughly six stops, so in full sun it still allows usable shutter speeds at wide apertures; beyond that you would need a denser filter.

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