EntityQ4673909· pop 5· linked from 27 articlesachromatic telescopeSign in to savetype of refracting telescopeConnectionsRobert HookeEntitywavelengthEntityoptical dispersionEntityfocal lengthEntityrefracting telescopeEntitychromatic aberrationEntityachromatic lensEntitydioptric powerEntityflint glassEntitycrown glassEntityapochromatEntityhistory of the telescopeEntitylist of telescope typesEntityCategoriesRefracting telescopesTelescope types