7pcs 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.

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.