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Spherical aberrationAstigmatismApochromatLateral aberrationApochromatismDiurnal aberrationAdaptive opticsAplanatismPlanetary aberrationAberrationAberration of lightAnastigmatOptical doubleSpherocylinderOpticBarlow lensVirtual focusLens flareHoropterArago spotScioptic ballGravitational lensDepointingBarlowOrthoDiffraction limitAnnual aberrationDerotatorFocal pointAnomalyExodriftDefocusField of viewPhotometeorRefractorHypergonAperturePhotodiscLimb darkeningMacrolensingOccular sparkEyepointFocusSeeingEpiscotisterOptical astronomyBlack drop effectAsphereCrown of aberrationCircumhorizontal arcSpherical mirrorAntitruncationUveovortexAstronomical transientOrbletGravity-darkeningAtmospheric refractionMonocularSuborbitDobsonian telescopeBinoscopeOblique sphereDextrorotationParabolic mirrorDigressionNight glassPhotodiskFlexureTelescopeObliquityAnticoronaAnorthoscopeRefracting telescopeGloryGravitational mirageMonogonHot spotEcliptickFar pointAutocollimationDobsonianGravitational lensingApocentreAstrophotonicsImage spaceKugelblitzLevorotationDamocloidPerturbationCatoptronParabolic reflectorLiquid mirror telescopeLimb brighteningNebulaChromatoscopeEclipseSundogBolometric correctionTrinocularsEinstein cross