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1.25
Color filters
1.25" and 2" red, green, yellow, blue, black, gray filters.
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.
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.
