In astronomy, iftiinka ugu horeeya waa isticmaalka ugu horeeya ee telescope (ama, guud ahaan, qalab cusub) si ay u qaataan image astronomical ka dib markii la dhisay. Tani inta badan ma aha daawashada ugu horeysay la isticmaalayo telescope ah; baaritaano indhaha laga yaabaa in lagu sameeyo iftiinka maalinta si ay ula qabsadaan qaybaha. image Light ugu horeysay caadi ahaan waa xiiso yar sayniska iyo waa tayo liidata, tan iyo xubno kala duwan ee telescope weli waa in la qabsado waxtarka ugu fiican. Inkastoo this, iftiin ugu horeysay mar walba waa daqiiqad of farax weyn, labadaba dadka in la qorsheeyo oo la dhiso telescope iyo bulshada cilmiga xiddigaha, kuwaas oo laga yaabaa in la filayo daqiiqad sanado badan halka telescope la dhisay.
cilmiga xiddigiska