6 pcs 1.25" Color Filter Set: Moon (neutral) filter The optical filter is made of glass НС-9 in the thickness of 1.5 mm. To pass in visible area of a spectrum approximately 10 … 15 %. Solar (black) filter It is intended for Sun supervision. It is made of glass НС-12 in the thickness of 1.5 mm. To pass in visible area of a spectrum no more than 0,0035 … 0,1 %. Optical density D 4.5-5. Red filter It is made of glass КС-13 in the thickness of 1.5 mm. Passes red area of a spectrum, detains dark blue, green, yellow and orange. Green filter It is made of glass ЗС-3 in the thickness of 1.5 mm. Blue filter It is made of glass СЗС-22 in the thickness of 1.5 mm. Passes violet and green area of a spectrum. Light Yellow filter It is made of glass ЖС-18 in the thickness of 1.5 mm. Passes partially green, yellow, orange and red colors of a spectrum. Doesn't pass violet and dark blue colors.
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