eyepieces造句
Sinceeyepiecesareinterchangeable,atelescopecanbeusedatavarietyofpowersfordifferentapplications.Solarfiltersdesignedtothreadintoeyepiecesthatareoftenprovidedwithinexpensivetelescopesarealsounsafe....
Sinceeyepiecesareinterchangeable,atelescopecanbeusedatavarietyofpowersfordifferentapplications.Solarfiltersdesignedtothreadintoeyepiecesthatareoftenprovidedwithinexpensivetelescopesarealsounsafe....