Tsis muaj dab tsi txuas rau tib neeg mus rau qhov xwm txheej zoo li siv sijhawm txaus siab rau kev ua si sab nraum zoov. Kev nrhiav sab nraum zoov thiab mus pw hav zoov tau dhau los ua txoj hauv kev ntawm lub neej rau ntau tus neeg. Thaum cov kev taug txuj kev nyuaj sab nraum zoov thiab mus pw hav zoov, cov "tawm- ntawm- mus txog" cov xwm txheej zoo nkauj ib txwm ua rau muaj kev xav paub, ua rau tib neeg xav tau los ze zog los saib xyuas lawv zoo dua. Ob lub koob yees duab tuaj yeem pab koj txav ze rau qhov xwm txheej, paub txog biodiversity, saib cov noog, saib cov tsiaj qus thiab toj roob hauv pes, thiab txawm tias zoo dua mus saib thaj chaw thaum taug kev. Lawv cia koj pom deb dua thiab meej dua li niaj zaus, txhim kho koj qhov kev mus pw hav zoov thiab sab nraum zoov.
Binoculars tuaj yeem muab faib ua plaub hom hauv qab no: lub koob yees duab tuav tes, lub koob yees duab loj, cov noog monocular - saib scopes, thiab portable monoculars. Cov no yog cov uas peb nquag ntsib hauv lub neej niaj hnub. Handheld binoculars yog feem ntau siv vim tias lawv yog portable dua. Rau kev ua si sab nraum zoov, kev yooj yim thiab kev pom tseeb yog qhov tseem ceeb tshaj plaws.
Binoculars tuaj nrog ob hom qauv prism: Porro prism thiab lub ru tsev prism, nrog rau qhov sib txawv tseem ceeb nyob hauv lawv txoj hauv kev hauv lub teeb. Qhov sib txawv ntawm cov qauv prism no ua rau muaj kev hloov pauv hauv qhov tsos, txheej txheem tsim khoom, thiab qhov loj ntawm ob hom duab tsom iav.
Porro prisms muab lub teeb xa hluav taws xob siab thiab cov duab zoo heev tab sis loj thiab tsis yooj yim rau nqa. Cov txheej txheem ru tsev prism zoo ib yam li qhov muag liab qab nyob rau hauv cov nqe lus ntawm kev pom kev deb, stereoscopy, thiab kev nkag siab ntawm qhov loj me, yog qhov loj me, tab sis muaj tus nqi tsim khoom ntau dua. Koj tuaj yeem xaiv raws li koj tus kheej xav tau.
Magnification ntawm Binoculars
Qhov magnification ntawm binoculars hais txog pes tsawg zaus lawv coj lub hom phiaj ze zog. Ntau tus pib xav tias qhov siab dua qhov loj ntawm lub koob yees duab, qhov zoo dua, tab sis qhov no tsis yog li ntawd.
Dab tsi magnification ntawm binoculars haum rau siv sab nraum zoov? Feem ntau, qhov clearer qhov zoo dua, tab sis ib tug magnification ntawm 6-10 lub sij hawm yog feem ntau txaus. Cov neeg uas muaj tes khov kho tuaj yeem xaiv 12 zaug, uas poob rau hauv qhov nruab nrab qhov loj me.
Nyob rau hauv lub cev ntawm binoculars, koj yuav pom ib tug xov tooj nyob rau hauv cov hom ntawm ( ) × ( ), xws li 10 × 42, 7 × 33, thiab lwm yam. Cov zauv no qhia txog lub magnification thiab aperture ntawm lub binoculars. Piv txwv li, 10 × 42 txhais tau hais tias qhov loj ntawm 10 npaug thiab qhov aperture ntawm 42 hli. Thaum xaiv magnification, 8 mus rau 10 zaug yog qhov tsim nyog tshaj plaws. Binoculars feem ntau muaj cov cim xws li 10 × 42, 8 × 32, 10 × 50, 12 × 50, qhov twg thawj tus lej yog qhov loj thiab qhov thib ob yog lub hom phiaj lens txoj kab uas hla.
Yog tias koj siv 10x binocular los saib tus noog 100 meters deb, nws zoo li pom nws ntawm qhov muag liab qab ntawm 10 meters deb. Raws li kev nthuav dav zuj zus, thaj chaw pom yuav nqaim dua, qhov pom ntawm lub teeb nkag mus tau qis dua, uas yooj yim ua rau lub teeb poob thiab ua rau nws nyuaj rau nrhiav lub hom phiaj. Nyob rau hauv lub teeb ci, 10x yog pom tseeb; nyob rau hauv lub teeb qis, 8x zoo dua. Yog li nws yog ib qho tsim nyog kom tsis txhob xaiv lub koob yees duab nrog lub ntsej muag loj heev.
Kev nthuav dav ntau dhau ntawm cov duab thaij duab yuav ua rau cov txheeb ze poob qis hauv cov duab zoo. Lub caij no, qhov kev nthuav dav siab txhais tau hais tias qhov chaw nqaim ntawm qhov pom, uas tsis zoo rau kev nrhiav cov hom phiaj. Tsis tas li ntawd, qhov kev nthuav dav siab yuav ua kom nthuav dav ntawm kev co ntawm lub hom phiaj ntawm kev pom tshwm sim los ntawm tes tshee, uas cuam tshuam rau kev soj ntsuam tshwj tsis yog tias tsis muaj cov khoom siv los tiv thaiv - shake.
Objective Lens ntawm Binoculars
Qhov loj dua lub hom phiaj lens aperture, qhov zoo dua, raws li lub hom phiaj lens txoj kab uas hla cuam tshuam cov nyiaj ntawm lub teeb nkag. Sab nraum zoov, nyob rau hauv huab cua tsis zoo los yog huab cua, lub aperture loj tso cai rau ntau lub teeb nkag mus, ua rau kom pom tseeb dua . 42mm txog 50mm yog qhov tsim nyog tshaj plaws; 56mm tso cai rau qhov siab tshaj plaws ntawm lub teeb nyob rau hauv, muab qhov ci ntsa iab tshaj plaws. Qhov loj dua qhov aperture ntawm binoculars, lawv lub teeb muaj zog dua - muaj peev xwm sib sau ua ke, thiab qhov yooj yim dua rau kev pom. Txawm li cas los xij, ib qho aperture loj heev feem ntau ua rau muaj qhov loj ntawm lub teeb pom kev zoo, ua rau lawv tsis yooj yim nqa.
Rau handheld binoculars, lub aperture feem ntau yog xaiv ntawm 20mm thiab 50mm. Qhov me me dhau qhov aperture yuav cuam tshuam rau cov neeg siv kev paub dhau los, thaum loj dhau qhov aperture ua rau lawv tsis yooj yim rau nqa thiab tuav.
Yog li ntawd, nws yog ib qho tseem ceeb los xaiv txoj cai aperture thiab magnification. Feem ntau hais lus, qhov tsis muaj lub koob yees duab tuav tes yog feem ntau nyob rau hauv thaj tsam ntawm 6 × 25 txog 10 × 50.
Ib qho tag nrho -binoculars loj tsis yog qhov kev xaiv zoo tshaj plaws rau kev mus pw hav zoov thiab kev ua si sab nraum zoov. Lawv hnyav thiab loj, noj ntau qhov chaw. Muab qhov xav tau ntau ntxiv rau cov khoom siv hnyav, hnab tshos -size compact binoculars yog qhov koj xaiv. Lawv cia koj tsis txhob txhawj txog qhov hnyav thiab qhov chaw, ua lub teeb thiab me me, yooj yim khaws thiab nqa.
Yuav Ua Li Cas Xaiv Lub Hnab Hnab Looj Tes -Sized Binoculars?
1. Parameters
Qhov hnyav thiab qhov loj me: Nws yog qhov tseeb tias cov koob yees duab siv rau kev ua si sab nraum zoov thiab mus pw hav zoov yuav tsum yog me me thiab hnyav. Yog li ntawd, peb pom zoo xaiv cov tsom iav qhov hnyav ib ncig ntawm 300g nrog lub hom phiaj lens txoj kab uas hla ntawm 28mm los yog tsawg dua.
Magnification thiab thaj tsam ntawm kev pom: Raws li kev nthuav dav ntxiv, thaj chaw saib yuav luag ib txwm txo qis. Vim tias qhov loj dua qhov loj dua, cov duab loj dua, qhov tsawg dua ntawm qhov chaw koj tuaj yeem pom, thiab qhov nqaim ntawm qhov pom. Yog li, txhawm rau sib npaug ntawm "拉近 effect" thiab "dav qhov kev pom", nws pom zoo kom xaiv cov tsom iav tsom iav nrog qhov loj ntawm 8x thiab 10.5x.
Qhov chaw saib yog hais txog qhov pom ntawm 1000 meters. Qhov loj dua qhov kev pom, qhov nrawm dua thiab yooj yim dua nws yog nrhiav cov hom phiaj.
Lub ntuj tsim ntau xim, qhov zoo dua. Nws yog feem ntau pom zoo kom xaiv lub koob yees duab nrog ED lo ntsiab muag, raws li lawv muab cov xim raug siab, tsawg distortion thiab chromatic aberration. Cov koob yees duab zoo tuaj yeem cuam tshuam cov xim qub ntawm qhov xwm txheej.
Tawm ntawm tus menyuam txoj kab uas hla: Nws yog qhov piv ntawm lub hom phiaj lens txoj kab uas hla mus rau qhov magnification (piv txwv li, binoculars uas tsis muaj 8x24 muaj qhov tawm ntawm cov tub ntxhais kawm txoj kab uas hla ntawm 3 hli). Qhov kev ntsuas no txiav txim siab qhov ci ntawm lub teeb pom kev zoo, uas yog qhov tseem ceeb heev vim tias koj ob lub qhov muag xav tau lub teeb txaus kom pom qhov kaj, siab - cov duab zoo. Nyob rau hauv ib txwm hnub kaj, cov tub ntxhais kawm txoj kab uas hla ntawm cov neeg feem coob yog nyob ib ncig ntawm 3 hli. Yog li ntawd, nyob rau hauv cov xwm txheej no, qhov kev tawm ntawm cov tub ntxhais kawm txoj kab uas hla loj dua 3 hli tsis tsim nyog rau kev siv, vim tias lub teeb ntxiv yuav tsis nkag rau hauv koj lub qhov muag. Yog li, cov hnab tshos sib sib zog nqus-size binoculars nrog cov tsis xws li 8x22 thiab 10x26 tuaj yeem ua tau raws li koj xav tau.
Txoj kev tsom xam: Qhov no yog ib qho uas nquag saib tsis taus. Kev tsom xam nrawm yog pab tau rau kev soj ntsuam ceev ceev - txav khoom zoo li noog. Kev tsom mus qeeb yuav ua rau koj nco qhov koj tab tom nrhiav. Yog li ntawd, xaiv lub koob yees duab nrog ceev ceev lossis ua kom pom tseeb - ua haujlwm pub dawb tuaj yeem ua tau raws li koj xav tau.
2. Optical Zoo
Lub teeb transmittance sawv cev rau qhov zoo ntawm binoculars. Ib khub ntawm ob lub koob yees duab muaj ntau dua 10 pawg ntawm cov lo ntsiab muag thiab qhov chaw cuam tshuam. FMC (Fully Multi-Coated) txhais tau hais tias, thawj zaug, txhua lub lens hauv pawg prism yog coated ntawm ob sab, thiab thib ob, siab -zoo binoculars tej zaum yuav muaj txog li kaum ob txheej txheej ntawm txhua qhov chaw los txhim kho tag nrho cov teeb pom kev zoo. Txawm tias nyob rau hauv qis - teeb pom kev zoo, koj tuaj yeem pom qhov sib txawv dua thiab cov ntsiab lus ci dua, uas yog ib qho tseem ceeb rau tus nqi sib txawv ntawm lub koob yees duab.
Yog li ntawd, thaum xaiv, ua tib zoo saib xyuas seb cov lo ntsiab muag puas yog FMC-coated; txwv tsis pub, prisms tsis muaj txheej los yog nrog cov txheej txheem tsis zoo yuav zoo li cov qhov rais plua plav.
3. Waterproof Performance
Kev ua si sab nraum zoov suav nrog kev siv cov xwm txheej nyuaj, thiab cov koob yees duab feem ntau siv los ntawm cov neeg laus thiab menyuam yaus, yog li lawv yuav tsum tau saib xyuas lawv cov kev tiv thaiv. Tsis tas li ntawd, kev sib khi ntawm lub koob yees duab yog qhov tseem ceeb. Sab nraum zoov, vim huab cua tsis zoo, nws yog qhov zoo tshaj plaws los xaiv nitrogen- ntim cov tsom iav tsis muaj dej, kom cov lo ntsiab muag tsis tshua muaj dej sab hauv thiab pos huab. Thaum siv, qhov kev xav thiab qhov hnyav yuav cuam tshuam rau kev nplij siab ntawm kev siv, yog li nws yog qhov zoo tshaj plaws los xaiv cov khoom uas hnyav, poob-resistant, thiab yooj yim rau siv thiab nqa.
