Field binoculars thiab prism binoculars yog me dua thiab tuaj yeem siv hauv tes nrog cov tsom iav tsom iav. Lawv tuaj yeem ua kom zoom rau ntawm cov hom phiaj nyob deb, yog li dhau ntawm lawv, cov xwm txheej nyob deb tuaj yeem pom meej dua. Tsis zoo li monocular telescopes, binocular telescopes kuj muab cov neeg siv qhov tob ntawm qhov tob, uas yog, lawv muaj kev pom zoo. Qhov no yog vim li cas thaum ob tug tib neeg ob lub qhov muag saib tib daim duab los ntawm cov ces kaum sib txawv me ntsis, cov nyhuv stereoscopic tshwm sim.
Rau daim teb binoculars lossis prism binoculars, qhov nce hauv qhov kev nthuav dav txhais tau tias txo qhov kev pom. Yog li ntawd, nws yog qhov nyuaj dua los txiav txim siab qhov chaw ntawm lub hom phiaj siv lub koob yees duab loj loj. Cov neeg feem coob muaj peev xwm tuav tau lub koob yees duab prism-type binoculars magnified 6x lossis 8x kom pom qhov chaw nyob deb. Yog hais tias qhov magnification ntau tshaj 10x, lub tripod yog pom zoo. Kev saib cov kis las kis las nrawm yuav tsum muaj kev pom dav dav, yog li nws yog qhov zoo tshaj plaws los siv lub koob yees duab prism-type binocular nrog qhov loj ntawm 5x lossis 6x. Thaum taug qab noog ya davhlau thiab saib cov kev pom panoramic, 7x lossis 8x prism ob lub tsom iav raj yog nyiam.