Los yog muab tso rau nws yooj yim dua, ib qho taw tes hauv ib qho kev kawm yuav tsum tau qhia raws li qhov taw qhia hauv daim duab thiab tsis yog lub voj voog. Yuav kom ua tiav qhov no, muaj ntau yam kev tsom xam ua tau.
Hauvcenter tsom qhov system, ob qho tib si ntawm lub tsom iav tsom iav yog tsom los ntawm tig ib lub log xwb. Nrog kev pab ntawm lub dioptric kho feature, uas feem ntau yog nyob rau ntawm txoj cai ocular, lub binoculars tuaj yeem hloov kho qhov muag tsis xws luag. Txhawm rau ua kom pom tseeb rau sab laug qhov muag, tsuas yog tig lub log ntawm qhov chaw kom pom tseeb ntawm ib qho khoom ntawm 100 meters deb. Nws yooj yim dua ua qhov no yog tias koj npog sab xis ntawm lub koob yees duab. Thaum koj ua tiav qhov no, npog rau sab laug ntawm lub koob yees duab thiab siv lub dioptric kho feature los teeb pom kev rau lub qhov muag sab xis.
Dhau li ntawm binoculars nrog lub hauv paus tsom xam qhov system, kuj tseem muaj cov koob yees duab uas khav theebtus kheej tsomsystem (BIF qauv). Nrog rau cov koob yees duab no, nws yog ib qho tsim nyog los kho qhov tsom kom haum rau txhua qhov muag ntawm tus kheej. Qhov no zoo li yog ib txoj kev cumbersome ntau tab sis nws muaj qhov zoo dua uas lub koob yees duab tuaj yeem tsim kho kom ruaj khov thiab lawv tuaj yeem ua kom tsis muaj dej ntxiv. Tias yog vim li cas cov neeg nyiam ua kis las dej, ntawm lwm tus, xaiv lub koob yees duab nrog rau ib tus neeg ua kom pom tseeb. Nyob rau hauv kev xyaum, cov binoculars yog teem rau infinity thiaj li hais tias cov khoom ntawm 7 meters deb mus rau infinity tshwm ntse yam tsis tas yuav tsum tau ib qho kev kho kom pom tseeb.