BS 7012-3:1989 - Light microscopes - Specification for fitting connecting optical dimensions for tube length 160 mm
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The BS 7012-3:1989 standard specifies the fitting and connecting optical dimensions for light microscopes with a tube length of 160 mm. It ensures compatibility and interchangeability of optical components, such as eyepieces, objective lenses, and tube lenses, for microscopes designed with this standardized optical tube length.