Raws li paub zoo, peb 57x850mm ntev - ntau lub koob yees duab zoom yog qhov me me (tsuas yog 32cm ntev, thaum cov khoom zoo sib xws feem ntau tshaj 40cm), sib dua hauv qhov hnyav (6.1kg rau cov khoom zoo sib xws, thaum peb cov khoom yog 3.1kg), thiab siab dua hauv qhov pom tseeb (kwv yees li 10% siab dua hauv cov kab kuaj pom tseeb. ) piv rau tib hom 775mm motorized zoom lens. Sib nrug los ntawm ntau pawg kev sib txuas thev naus laus zis thiab kev tsim qauv, lwm qhov tseem ceeb yog kev siv lub lens aspherical.

Dab tsi yog cov txiaj ntsig ntawm kev siv cov lo ntsiab muag aspherical hauv telephoto lo ntsiab muag?

Tshem tawm spherical aberration

Cov lo ntsiab muag kheej kheej tuaj yeem ua rau lub ntsej muag tsis zoo, uas txhais tau hais tias cov duab tsis zoo ntawm qhov nruab nrab thiab cov npoo ntawm lub lens. Aspherical lo ntsiab muag tuaj yeem kho qhov kev tsis sib haum xeeb no, ua rau pom meej dua thiab zoo ib yam.

Txhim kho kho qhov muag zoo

Aspherical lo ntsiab muag tuaj yeem txhim kho qhov zoo ntawm qhov kho qhov muag, ua kom pom tseeb dua. Lawv tuaj yeem txo qhov aberrations xws li coma, curvature teb, thiab chromatic aberration, yog li txhim kho cov duab raug thiab sib xws.

Kev daws teeb meem nce ntxiv

Kev siv cov iav lo ntsiab muag ua kom muaj kev daws teeb meem, tso cai rau kom pom cov ntsiab lus nthuav dav ntxiv. Lawv tuaj yeem txo qhov tawg ntawm lub teeb thiab chromatic aberration, yog li txhim kho cov duab meej thiab ntse.

Txo qhov hnyav thiab qhov loj ntawm lub lens

Piv nrog rau cov lo ntsiab muag kheej kheej, cov lo ntsiab muag aspherical tuaj yeem ua nyias, yog li txo qhov hnyav thiab qhov loj ntawm lub lens, ua rau cov khoom siv lub koob yees duab sib dua thiab nqa tau yooj yim dua.

Ua kom yooj yim hauv kev tsim lub lens

Kev siv cov lo ntsiab muag aspherical muab lub lens tsim kom muaj kev ywj pheej thiab yooj yim dua. Lawv tuaj yeem tsim tau raws li cov kev xav tau tshwj xeeb kom ua tiav cov duab zoo dua.

Hauv cov ntsiab lus, kev siv cov lo ntsiab muag aspherical tuaj yeem txhim kho cov duab zoo, nce kev daws teeb meem, txo qhov hnyav thiab qhov loj me, thiab muab kev yooj yim dua hauv kev tsim lub lens. Cov yam ntxwv no ua rau lawv yog ib qho khoom tseem ceeb hauv telephoto lo ntsiab muag.

Nyob rau tib lub sijhawm, aspherical lo ntsiab muag yog kim dua, yog li niaj hnub no ntau lub tshuab hluav taws xob zoom tsis siv cov lo ntsiab muag aspherical txhawm rau txo cov nqi.