Ngo-1611, isazi sezinkanyezi saseJalimane u-Kepler wathatha izingcezu ezimbili ze-lens lens njengenhloso kanye ne-eyepiece, ukukhulisa ngokusobala kuthuthukisiwe, kamuva abantu babheka lesi simiso se-optical njenge-telescope ye-Kepler.

Ngo-1757, u-Du Grand ngokufunda ingilazi nokuhlehla kwamanzi kanye nokuhlakazwa, wasungula isisekelo sethiyori zelensi ye-achromatic, futhi wasebenzisa umqhele nezingilazi zetshe letsheza ezenza ilensi ye-achromatic.Kusukela ngaleso sikhathi, i-achromatic Refractor Telescope yashintsha ngokuphelele umzimba we-telescope yesibuko eside.

Ekupheleni kwekhulu leshumi nesishiyagalolunye, kanye nobuchwepheshe bokukhiqiza buthuthukisiwe, ukwenza izinga elikhudlwana lesibonakude esiphikisayo kungenzeka, bese kuba nokukhiqizwa komvuthwandaba omkhulu weRefractor Telescope.Omunye wabamele kakhulu kwakuyibonakude i-Ekes enobubanzi obungu-102 cm ngo-1897 kanye nesibonakude sika-Rick esingu-91 cm ububanzi ngo-1886.

Isibonakude esibukisayo sinezinzuzo zobude bokugxila, isikali sepuleti sikhulu, ukugoba kweshubhu akuzwakali, kuwufanele kakhulu umsebenzi wokulinganisa wezinkanyezi.Kodwa njalo inombala osele, ngesikhathi esifanayo ku-ultraviolet, ukumuncwa kwemisebe ye-infrared kunamandla kakhulu.Nakuba isimiso esikhulu sokuthulula ingilazi sinzima, kwisibonakude sase-Yerkes esibukisayo esakhiwa ngo-1897, intuthuko isifinyelele umvuthwandaba, kusukela kule minyaka eyikhulu akubangakho sibonakude esikhulu kunazo zonke esabonakala.