SVBONY SV139 Telescope ND8 Neutral Density Filter for Moon Observation

From the brand Observation Discovery & Exploration Planetary photograph Planetary visual Universal Smartphone Adapter Deep Sky Visual Zoom Eyepiece Telescope Filter Telescope Camera

When you observe the moon, the bright moon will irritate your eyes and cause eye diseases. It can alleviate this pain and damage to you by the moon. SV139 1.25" Neutral Density ND filter reduces glare so you can see more lunar detail and surface features with your telescope.

SV139 ND0.9 filter is coated on both sides, reduction of scattering light. SV139 ND0.9 filters are made of HD optics glass that have good level of transmittance. The clear aperture diameter is 26mm.

Specifications: Type: Neutral Density Filter Material: Aluminum Frame, Metal Thread and Optical Glass Barrel diameter: 1.25'' Optical density value: 0.9 Transmission: 12.5% Thread: Standard M28.5*0.6mm Net Weight: 5.0g / 0.19oz/0.08lb Glass Thickness: 2mm Note: Eyepiece are NOT included

The Neutral Density ND Filter provides great versatility in changing light; it reduces the amount of light without effecting color balance; the perfectly neutral color will not alter the natural color of the moon.

The high-quality optical lenses are made by completed professional optical glasses with Multi-layer coating. The ND8 filter transmits only 12.5% of the incoming light, but it has outstanding image sharpness and perfect colour neutrality.

The 1.25'' barrel diameter filter cell threads directly into the 1.25 inch barrel of your telescope eyepiece, making it useful for different caliber astronomical telescopes through which the light of the moon can be extremely overwhelming.

The Great Filter Frames are made by aluminum alloy. The serrated design of the edge of the frame makes it easy to install and increases surface durability.

The filter can extend shooting time, such as wanting to shoot misty flowing water in very bright places. Exposure time can be greatly extended to blur pedestrians or even completely.

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