Ilensi yokusondeza egxile kwi-focus inokutshintsha okanye ilungise ubude be-focal ngaphakathi koluhlu oluthile, ukuze ifumane umbono obanzi nomncinci owahlukileyo; ilensi yokusondeza ngesandla inokutshintsha uluhlu lokudubula ngokutshintsha ubude be-focal ngesandla ngaphandle kokutshintsha umgama wokudubula; sinikezela ngelensi yokusondeza ngesandla esemgangathweni ophezulu, echanekileyo kakhulu, singayamkela nenkonzo eyenzelwe wena.
Ubude be-wavelength bugxile ekuboneleleni ngeemveliso zokukhanya ezichanekileyo kakhulu kangangeminyaka engama-20