Baader 31.7mm ND-0.9 Neutral Density Filter is a lightweight and durable Neutral Density Filter which offers perfect energy management during Lunar and Solar observation. The multi-coated offers no reflections, stray light and ghosting. Baader's special filter cell design offers unique features that enhance their reliability and usability.
The ultra-thin filter cell results in the maximum possible clear aperture, in order to minimize vignetting. It works well virtually any astronomy eyepiece or accessory that has 1.25 inch filter threads. The Neutral Density filter reduces the overall brightness of an image to cut down glare while viewing bright astronomical objects through a telescope.
Baader balances each dielectric coating stack to avoid the ghosts and annoying halos that plague other manufacturer’s filters. Unlike most other filters, Baader filters are truly designed to be stacked and combined which is possible due to the high optical quality and highly efficient anti-reflection multi-coatings.
The ability to combine filters opens up many interesting possibilities, permitting unique spectral characteristics unachievable with any single filter. It retains true colour balance of the objects being observed since all wavelengths are transmitted uniformly over the entire spectrum.
Features: Baader 1.25" (31.7mm) ND-0.9 Neutral Density Filter
- An essential accessory to observe bright objects
- Multi coated results no reflections, no stray light, and no ghosting
- Special filter cell offers unique features that enhance their reliability and usability
- Works well virtually any astronomy eyepiece or accessory that has 1.25" filter threads
- Retain true colour balance of the objects being observed since all wavelengths are transmitted uniformly over the entire spectrum
- Reduce the overall brightness of an image to cut down glare while viewing bright astronomical objects through a telescope
- Useful for splitting binary systems, comfortably observing the moon, or stacking with other planetary filters
Specification: Baader 31.7mm ND-0.9 Neutral Density Filter
- Model: Neutral Density
- Fitting Size: 1.25"
- Optical Density: 0.9
- Transmission: 12.5%
- Coating: Multi-coated
- Filter Effect: Neutral Density
Kit Content
Baader 1.25 Inch Or 31.7mm ND-0.9 Neutral Density Filter
User Operating Instructions Manual
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