is 186.71 KB, has a resolution of 582x477 pixels and was uploaded on June 20, 2020 @ 7:26 pm by user: paulinohm. It is filed under the tags: phoropter, aperture, lens, refracting telescope, salesperson. Click the blue button at the top to freely download: Refracting Telescope Doublet Low-dispersion Glass Aperture png.