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. |
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. |
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