is 307.06 KB, has a resolution of 805x801 pixels and was uploaded on March 9, 2020 @ 11:42 am by user: antonlng. It is filed under the tags: megaphone, refracting telescope, sky telescope, optics, skywatcher. Click the blue button at the top to freely download: Dobsonian Telescope Sky-Watcher Optical Instrument Optics png.