Cholinga cha Lens: Kumvetsetsa dziko losangalatsa la 1.499

Pankhani ya zovala za m'maso, ma lens amagwira ntchito yofunika kwambiri kuti azitha kuwona bwino komanso momasuka.Polankhula za cholinga cha mandala, mawu amodzi omwe nthawi zambiri amabwera ndi 1.499.Koma kodi zikutanthauza chiyani kwenikweni?Kodi zimakhudza bwanji mawonekedwe athu?

Mwachidule, 1.499 imatanthawuza index ya refractive ya mandala.Refractive index imatsimikizira kuchuluka kwa magalasi omwe amatha kupindika pamene kuwala kumadutsamo, zomwe zimakhudza kuthekera kwake kukonza zovuta zamasomphenya.Mlozera wapamwamba wa refractive umatanthauza kuti mandala amatha kupindika bwino kwambiri, zomwe zimapangitsa kuti pakhale magalasi ocheperako, opepuka.Kumbali ina, cholozera chochepa cha refractive chingafunike magalasi okulirapo kuti akwaniritse mulingo womwewo wowongolera.

1.499 magalasi, omwe amapezeka m'magalasi a maso, amapereka bwino pakati pa kulemera, makulidwe ndi mawonekedwe a kuwala.Amapangidwa kuchokera ku pulasitiki yotchedwa CR-39, yomwe imadziwika chifukwa cha mawonekedwe ake abwino kwambiri.Magalasi awa amapezeka pazamankhwala osiyanasiyana, kuphatikiza kuyang'anira pafupi, kuyang'ana patali, ndi astigmatism.

Chimodzi mwazabwino zazikulu zamagalasi a 1.499 ndikuthekera kwawo.Ndiotsika mtengo kupanga kusiyana ndi magalasi okhala ndi ma index apamwamba kwambiri monga 1.60 kapena 1.67.Izi zimawapangitsa kukhala chisankho chodziwika bwino kwa anthu omwe akufunafuna njira yotsika mtengo ya zovala popanda kusokoneza mawonekedwe.

Kuphatikiza apo, ma lens a 1.499 amapereka kukana kwamphamvu komanso kulimba kwamavalidwe a tsiku ndi tsiku.Sakonda kukala ndipo amatha kupirira ngozi yangozi kuposa zida zina zamagalasi.Komabe, ndikofunikira kudziwa kuti sangakhale ochepa kapena opepuka ngati ma lens apamwamba.Ngati muli ndi mankhwala apamwamba, mungafune kufufuza zosankha zapamwamba kuti muwoneke bwino.

Mwachidule, cholinga cha magalasi a 1.499 ndikupatsa anthu njira yodalirika komanso yotsika mtengo yowongolera masomphenya awo.Kaya ndinu owonera pafupi, mumawona patali, kapena muli ndi malingaliro olakwika, magalasi awa amapereka magwiridwe antchito oyenera komanso mtengo wake.Pomvetsetsa dziko la1.499 magalasi, mutha kupanga chisankho chodziwitsidwa posankha zovala zamaso zomwe zimagwirizana ndi zosowa zanu.