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90% Average Reflectance from 250 450 nm Collimates a Divergent Source or Focuses a Collimated Beam without Spherical or Chromatic Aberrations Effective Focal Lengths from 15 mm (0. 59") to 8" (203. 2 mm) Surface Roughness: <100 (RMS) Clear Aperture: >90% of Diameter Three Kinds of Mounting Adapters for 1 2", 1", and 2" Versions: Externally SM Threaded Unthreaded for" name="description"/> 90% Average Reflectance from 250 450 nm Collimates a Divergent Source or Focuses a Collimated Beam without Spherical or Chromatic Aberrations Effective Focal Lengths from 15 mm (0. 59") to 8" (203. 2 mm) Surface Roughness: <100 (RMS) Clear Aperture: >90% of Diameter Three Kinds of Mounting Adapters for 1 2", 1", and 2" Versions: Externally SM Threaded Unthreaded for" property="og:description"/> 90% Average Reflectance from 250 450 nm Collimates a Divergent Source or Focuses a Collimated Beam without Spherical or Chromatic Aberrations Effective Focal Lengths from 15 mm (0. 59") to 8" (203. 2 mm) Surface Roughness: <100 (RMS) Clear Aperture: >90% of Diameter Three Kinds of Mounting Adapters for 1 2", 1", and 2" Versions: Externally SM Threaded Unthreaded for" name="twitter:description"/>
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