Posankha magalasi operekedwa ndi dokotala, ogula ambiri amakhulupirira kuti ma lens akakwera, ma lens amakhala abwino kwambiri. Komabe, magwiridwe antchito a lens amakhudzidwa ndi zinthu zingapo, kuphatikizapo magwiridwe antchito a kuwala, makulidwe a lens, kulemera kwake, mtengo wake, ndi zina zotero. Kumvetsetsa mawonekedwe a magalasi okhala ndi zizindikiro zosiyanasiyana kumathandiza madokotala a maso kupereka njira yoyenera kwambiri kwa aliyense wovala.
Magwiridwe antchito a kuwala
Abbe Value imayesa kuchuluka kwa kufalikira kwa chromatic komwe kumapezeka mu lens. Abbe value yapamwamba imatanthauza kuwona bwino komanso kusinthasintha pang'ono kwa mitundu.
- Index 1.50 imapereka mtengo wapamwamba kwambiri wa Abbe pakati pa zipangizo zonse za lenzi ya optical, zomwe zimapereka mawonekedwe abwino kwambiri komanso kufalikira kochepa kwa chromatic.
- Kawirikawiri, zipangizo zapamwamba nthawi zambiri zimakhala ndi kusinthana kwa kuwala kwa kuwala kuti zipeze magalasi opyapyala. Komabe, index 1.60 ndi 1.71 zimaperekabe mtengo wapamwamba wa Abbe.
Kwa ogula omwe ali ndi mankhwala ochepa komanso omwe amaika patsogolo mawonekedwe abwino, lenzi ya index 1.50 ndiyofunikira kwambiri.
Kunenepa & Kulemera
Kulemera ndi makulidwe a lenzi ndi chimodzi mwa kusiyana koonekera kwambiri pakati pa zipangizo.
- Chizindikiro 1.50 ndi 1.56 chimapereka makulidwe oyenera komanso kulemera koyenera.
- Mndandanda 1.60 ndi 1.67 umapereka ma lens opyapyala komanso opepuka, zomwe zimapangitsa kuti maonekedwe azioneka bwino makamaka kwa odwala omwe ali ndi mankhwala apakatikati mpaka okwera.
- Mndandanda 1.71 ndi 1.74 umapereka ma lens owonda komanso opepuka kwambiri, zomwe zimapangitsa kuti akhale abwino kwambiri kwa odwala omwe ali ndi mankhwala ambiri.
Pamene chizindikiro chikuwonjezeka, magalasi a magalasi amakhala ochepa komanso opepuka, zomwe zimapangitsa kuti mawonekedwe awoneke bwino komanso kuti munthu azimva bwino.
Kuyika Mtengo
Mtengo ndi chinthu china chofunikira posankha ma lens. Kawirikawiri, kuchuluka kwa ma lens kumakhala ndi mtengo wokwera, ngakhale pali zosiyana.
- Mndandanda 1.50 ndi 1.56 ndi njira zotsika mtengo pamsika. Koma mtengo wa 1.50 ndi wokwera kuposa 1.56.
- Mndandanda 1.60 ndi 1.67 zikuyimira gawo lapakati mpaka lapamwamba, kulinganiza magwiridwe antchito ndi kutsika mtengo.
- Index 1.71 ndi yokwera mtengo, koma ndi yotsika mtengo kwambiri kuposa 1.74.
- Index 1.74 ndi njira yapamwamba kwambiri yopangidwira mankhwala okwera kwambiri komanso zosonkhanitsa zapamwamba kwambiri.
Mapeto
Palibe chizindikiro chimodzi cha lenzi chomwe chili choyenera kwa aliyense wovala. M'malo mwake, yankho labwino kwambiri ndi lomwe likugwirizana ndi zosowa za wovalayo. Kuwonjezera pa mfundo zomwe zili pamwambapa, zinthu monga kukula kwa chimango, mawonekedwe a chimango, mtunda wa anapiye, ndi kapangidwe ka lenzi ziyeneranso kuganiziridwa, chifukwa zonsezi zimatha kukhudza makulidwe a lenzi yomaliza, mawonekedwe ake, komanso chitonthozo cha kuvala.
Monga wopanga ma lens aluso, timapereka mndandanda wathunthu wa ma lens kuyambira 1.50 mpaka 1.74, pamodzi ndi mitundu yosiyanasiyana ya ma lens okhala ndi utoto, photochromic, ndi tint. Mwa kupereka mayankho osiyanasiyana a ma lens, timathandiza ogwirizana nafe padziko lonse lapansi kukwaniritsa zosowa zosiyanasiyana za msika ndikuwonetsetsa kuti aliyense wovalayo apeza lens yoyenera zosowa zake payekha.
Mungapeze zambiri patsamba lino
https://www.universeoptical.com/stock-lens/