SV139 Moon Filter 1.25 inch Telescope Eyepiece Filters | Standard M28.5×0.6mm Threads,ND4 ND8 ND16 ND1000 for

Key features

• The 1.25" Neutral Density Moon filter kit;Reduces glare so you can see more lunar detail and surface features with your telescope;Will not alter the natural color of the Moon
• Use ND4 filter with 25% transmission when Waxing Crescent Moon;As the Moon moves around the Earth; you get to see more and more of the illuminated half;It's very good effect to use the ND4 filter at this time
• Use ND8 filter with 12.5% transmission when Last and First Quarter Moon;It's very good effect to use the ND8 filter In last quarter and the first quarter phase
• Use ND16 filter with 6.25% transmission when Gibbous Moon;the illuminated part of the Moon that you can see decreases, and we say it's waning; The first week after full;It's very good effect to use the ND16 filter at this time
• Use ND1000 filter with 0.10% transmission when Full Moon; you can see a full disk;It's very good effect to use the ND1000 filter at this time at the brightest time of the moon

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