Feature
●Neutral Density ND Filter; giving great versatility in changing light; reduces the amount of light without effecting color balance; perfectly neutral color will not alter the natural color of the moon
●High-quality optical lenses; made by completed professional optical glasses; Multi-layer coating; ND8 filter transmits only 12.5% of the incoming light; it has outstanding image sharpness and perfect colour neutrality
●1.25 barrel diameter; metal filter cell threads directly into the 1.25 inch barrel of your telescope eyepiece; useful for different caliber astronomical telescopes through which the light of the moon can be extremely overwhelming
●Great Filter Frames; Filter Frames made by aluminum alloy; the serrated design of the edge of the frame makes it easy to install;Increase surface durability
●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
Description
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
Performance optics glass:
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.
26mm is the clear aperture diameter.
