Opaque, " Balop " slides were cards on 4 " by 3 " stock or larger ( always maintaining the 4 : 3 aspect ratio ) that were photographed by the use of a Balopticon.
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In the early days of television, there were two types of slides for broadcast a " transparent slide " or transparency, and an " opaque " slide, or " Balop " ( a genericized trademark of Bausch & Lomb's Balopticon projectors . ) Transparency slides were prepared as 2-inch square cards mounted in cardboard or glass, or 4 " by 3.25 " film, surrounded by a half-inch of masking on all four sides.
How to say balopticon in Hindi and what is the meaning of balopticon in Hindi? balopticon Hindi meaning, translation, pronunciation, synonyms and example sentences are provided by Hindlish.com.
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