Yuav Ua Li Cas Xaiv Qhov Zoo Tshaj Lens rau Koj Lub Koob Yees Duab Kev Ruaj Ntseg?

ib ,Hom Kev Ruaj Ntseg Lub Koob Yees Duab Lenses:

Lub koob yees duab kev ruaj ntseg lo ntsiab muag tuaj nyob rau hauv ntau hom, txhua tus tsim kom haum rau cov kev xav tau kev soj ntsuam tshwj xeeb.Kev nkag siab txog hom lo ntsiab muag muaj tuaj yeem pab koj xaiv qhov tsim nyog rau koj lub koob yees duab kev ruaj ntseg teeb.Ntawm no yog cov feem ntau hom ntawmkev ruaj ntseg lub koob yees duab lo ntsiab muag:

1,Tsau Lens: Lub lens ruaj khov muaj ib qhov ntev focal ntev thiab qhov chaw pom, uas tsis tuaj yeem hloov kho.Nws yog ib qho kev xaiv uas raug nqi tsim nyog rau kev saib xyuas thaj chaw tshwj xeeb yam tsis tas yuav tsum tau hloov kho ntau zaus.Tsau lo ntsiab muag muaj nyob rau hauv qhov sib txawv focal lengths, tso cai rau koj xaiv qhov xav tau qhov chaw saib.

2,Varifocal Lens: Lub varifocal lens muaj adjustable focal ntev, tso cai rau koj hloov lub teb ntawm saib manually.Nws muab kev yooj yim hauv kev kho cov qib zoom thiab yog qhov zoo rau cov xwm txheej uas qhov chaw soj ntsuam yuav hloov lossis xav tau ntau theem ntawm kev nthuav dav.Varifocal lo ntsiab muag feem ntau yog siv rau hauv cov xwm txheej uas yuav tsum muaj ntau yam, xws li kev soj ntsuam sab nraum zoov.

3,Zoom Lens:Lub lens zoom muab lub peev xwm los kho qhov focal ntev thiab thaj tsam ntawm kev pom nyob deb.Nws tso cai rau ob qho tib si optical zoom thiab digital zoom.Optical zoom tswj cov duab zoo los ntawm kev kho cov ntsiab lus ntawm lub lens, thaum digital zoom ua kom cov duab loj dua, ua rau cov duab tsis zoo.Zoom lo ntsiab muag feem ntau yog siv rau hauv cov ntawv thov uas saib xyuas cov chaw taws teeb thiab lub peev xwm los ntes cov ntsiab lus zoo yog qhov tseem ceeb, xws li hauv qhov loj hauv tsev lossis sab nraum zoov.

4,Wide-Angle Lens: Lub lens wide-angle muaj qhov ntev focal ntev, uas ua rau pom qhov dav dav.Nws yog qhov tsim nyog rau kev saib xyuas thaj chaw loj lossis qhov chaw qhib qhov chaw uas tau txais kev pom dav dav yog qhov tseem ceeb.Lub ntsej muag dav dav feem ntau yog siv rau hauv kev soj ntsuam xws li chaw nres tsheb, warehouses, lossis kev saib xyuas sab nraum zoov.

5,Telephoto Lens: Lub lens telephoto muaj qhov ntev focal ntev, muab qhov nqaim ntawm qhov pom thiab nthuav dav dua.Nws yog qhov zoo tagnrho rau kev saib xyuas ntev lossis cov xwm txheej uas khaws cov ntsiab lus tshwj xeeb los ntawm qhov deb yog qhov tseem ceeb.Telephoto lo ntsiab muag feem ntau yog siv rau cov ntawv thov xws li daim ntawv tso cai daim ntawv lees paub, kev txheeb xyuas lub ntsej muag, lossis saib xyuas cov ntsiab lus tseem ceeb ntawm qhov deb.

6,Pinhole Lens:Lub lens pinhole yog lub lens tshwj xeeb uas tsis tshua muaj me me thiab tsis pom kev.Nws yog tsim los muab zais rau hauv cov khoom lossis qhov chaw, tso cai rau kev soj ntsuam zais cia.Pinhole lo ntsiab muag feem ntau yog siv nyob rau hauv cov xwm txheej uas lub koob yees duab yuav tsum tau muab zais los yog tsis meej pem, xws li nyob rau hauv lub ATMs, lub qhov rooj peepholes, los yog cov ntaub ntawv soj ntsuam kev khiav hauj lwm.

二,Yuav Ua Li Cas Xaiv Qhov Zoo Tshaj Lens rau Koj Lub Koob Yees Duab Kev Ruaj Ntseg?

Xaiv lub lens zoo tshaj plaws rau koj lub koob yees duab kev ruaj ntseg yog ib kauj ruam tseem ceeb hauv kev ua kom pom kev ua tau zoo thiab ntes cov yeeb yaj kiab zoo.Nov yog qee yam yuav tsum xav txog thaum xaiv lub lens:

Lub koob yees duab hom:Txiav txim siab hom koob yees duab kev ruaj ntseg uas koj muaj lossis npaj yuav yuav.Cov koob yees duab sib txawv, xws li mos txwv, dome, lossis PTZ (yias-tilt-zoom), yuav xav tau hom lens tshwj xeeb lossis qhov ntau thiab tsawg.

Focal Length: Focal ntev txiav txim siab qhov chaw saib thiab qib zoom.Nws yog ntsuas hauv millimeter (mm).Xaiv qhov ntev focal uas haum rau koj cov kev xav tau tshwj xeeb.Nov yog qee qhov kev xaiv ntau:

Wide-Angle Lens(2.8mm txog 8mm): Muab qhov dav dav ntawm qhov pom, haum rau npog thaj chaw loj lossis saib xyuas qhov chaw dav.

Standard Lens (8mm mus rau 12mm): Muab qhov sib npaug saib haum rau kev soj ntsuam daim ntawv thov.

Telephoto Lens (12mm thiab siab dua): Muab qhov nqaim ntawm qhov pom tab sis muaj peev xwm zoom ntau dua rau kev saib xyuas ntev lossis cov ncauj lus kom ntxaws.

Field of View (FOV): Xav txog thaj chaw koj xav saib xyuas thiab qib ntawm cov ntsiab lus xav tau.Kev pom dav dav yog qhov muaj txiaj ntsig zoo rau thaj chaw qhib loj, thaum qhov nqaim FOV zoo dua rau cov phiaj xwm tshwj xeeb uas xav tau kev soj ntsuam ze dua.

Aperture: Lub aperture txiav txim siab lub lens lub teeb sib sau ua ke.Nws yog sawv cev los ntawm tus lej f (piv txwv li, f/1.4, f/2.8).Tus lej f qis dua qhia qhov dav dav dua, tso cai rau ntau lub teeb nkag mus rau lub lens.Lub aperture dav yog qhov muaj txiaj ntsig zoo nyob rau hauv lub teeb qis lossis rau kev ntes cov duab meej hauv qhov tsaus ntuj.

Duab Sensor Compatibility: Xyuas kom meej tias lub lens yog sib xws nrog cov duab sensor loj ntawm koj lub koob yees duab.Cov duab sensor loj muaj xws li 1/3 ", 1/2.7", thiab 1/2.5 ".Siv lub lens tsim rau qhov tseeb qhov loj me pab tswj cov duab zoo thiab tsis txhob vignetting lossis duab distortion.

Lens Mount: Tshawb xyuas lub lens mount hom xav tau rau koj lub koob yees duab.Hom mount muaj xws li CS mount thiab C mount.Xyuas kom meej tias lub lens koj xaiv phim lub koob yees duab mount hom.

Varifocal vs. Fixed Lens:Varifocal lo ntsiab muag tso cai rau koj los kho qhov focal ntev manually, muab qhov hloov pauv hloov qhov pom raws li xav tau.Tsau lo ntsiab muag muaj qhov ntev focal ntev thiab muab qhov chaw ruaj khov ntawm qhov pom.Xaiv hom tsim nyog raws li koj qhov kev xav tau soj ntsuam.

Nyiaj txiag:Xav txog koj cov peev nyiaj thaum xaiv lub lens.Qhov zoo tshaj plaws lo ntsiab muag nrog cov yam ntxwv siab heev yuav kim dua tab sis tuaj yeem muab cov duab zoo dua thiab ua haujlwm ntev.

Chaw tsim tshuaj paus thiab tshuaj xyuas:Tshawb nrhiav cov tuam txhab muaj npe nrov uas tshwj xeeb hauv kev ruaj ntseg lub koob yees duab lo ntsiab muag.Nyeem cov neeg siv khoom tshuaj xyuas thiab nrhiav cov lus pom zoo kom ntseeg tau tias koj xaiv cov khoom lag luam txhim khu kev qha thiab muaj npe nrov.

三Xaiv lub Lens rau Sab Hauv Tsev vs Sab Nraud: Qhov txawv yog dab tsi?

Thaum xaiv lub lens rau kev soj ntsuam sab hauv lossis sab nraum zoov, muaj ob peb qhov sib txawv tseem ceeb los txiav txim siab vim qhov txawv ntawm qhov chaw ib puag ncig.Nov yog yam koj yuav tsum paub:

Teeb pom kev zoo:Sab nraum zoov ib puag ncig feem ntau muaj teeb pom kev sib txawv, suav nrog lub hnub ci ci, ntxoov ntxoo, thiab teeb pom kev tsawg thaum hmo ntuj.Sab hauv ib puag ncig, ntawm qhov tod tes, feem ntau muaj kev tswj hwm teeb pom kev zoo nrog cov teeb pom kev zoo ib yam.Yog li ntawd, kev xaiv lub lens yuav tsum coj mus rau hauv tus account qhov teeb meem teeb pom kev zoo ntawm txhua qhov chaw.

Sab nraum zoov:Xaiv lub lens nrog qhov dav aperture (tsawg f-tus lej) kom sib sau ntau lub teeb nyob rau hauv qhov chaw qis.Qhov no ua kom pom kev zoo dua thiab cov duab zoo thaum tsaus ntuj, kaj ntug, lossis hmo ntuj.Tsis tas li ntawd, lo ntsiab muag uas muaj peev xwm ua tau zoo tuaj yeem tswj qhov sib txawv ntawm lub hnub ci ci thiab cov duab ntxoov ntxoo zoo.

Sab Hauv Tsev: Vim qhov chaw sab hauv tsev feem ntau muaj teeb pom kev zoo ib yam, lo ntsiab muag nrog nruab nrab apertures yuav txaus.Lub lens nrog tus lej f-ntau dua me ntsis tseem tuaj yeem xa cov duab zoo hauv cov chaw sab hauv tsev yam tsis tas yuav muaj peev xwm dav aperture.

Field of View:Qhov xav tau kev saib xyuas yuav txawv raws qhov loj thiab qhov teeb tsa ntawm thaj chaw soj ntsuam.

Sab nraum zoov: Cov chaw sab nraum zoov feem ntau xav tau kev pom dav dua los saib xyuas qhov chaw loj dua.Lub ntsej muag dav dav feem ntau yog siv los ntes cov kev xav dav dav, tshwj xeeb tshaj yog rau cov chaw qhib xws li chaw nres tsheb lossis lub tsev sab nrauv.

Sab Hauv Tsev: Qhov chaw saib rau kev soj ntsuam sab hauv tsev yuav txawv nyob ntawm thaj chaw tshwj xeeb tau saib xyuas.Qee zaum, lub lens dav dav yuav tsim nyog los npog chav loj lossis hauv tsev.Txawm li cas los xij, nyob rau hauv qhov chaw nruj dua los yog qhov kev soj ntsuam ntxaws yog tsim nyog, lub lens nrog lub ntsej muag nqaim dua lossis muaj peev xwm kho qhov ntev focal ntev (varifocal lens) yuav nyiam dua.

Huab cua Resistance: Sab nraum zoov cov koob yees duab thiab cov lo ntsiab muag yuav tsum tau tsim los tiv thaiv huab cua hnyav, xws li los nag, daus, plua plav, lossis kub heev.Nws yog ib qho tseem ceeb uas yuav tau xaiv cov lo ntsiab muag tshwj xeeb uas tsim los siv sab nraum zoov, uas feem ntau tuaj nrog huab cua tiv thaiv zoo li cov ntaub thaiv npog los tiv thaiv cov dej noo thiab cov khib nyiab.

Vandal Resistance:Nyob rau hauv ib puag ncig sab nraum zoov, muaj kev pheej hmoo siab dua ntawm kev ua phem lossis kev ua phem.Xav txog cov lo ntsiab muag nrog cov yam ntxwv tiv thaiv xws li cuam tshuam-resistant casings los yog domes los tiv thaiv kev puas tsuaj thiab xyuas kom lub koob yees duab ua haujlwm thiab cov duab zoo tsis raug cuam tshuam.

IR Compatibility:Yog tias koj qhov kev soj ntsuam muaj xws li infrared (IR) illumination rau hmo ntuj pom kev, xyuas kom meej tias lub lens yog sib xws nrog IR teeb.Qee qhov lo ntsiab muag yuav muaj IR-txiav lim los txhim kho cov duab zoo thaum nruab hnub thaum tso cai rau IR teeb pom kev zoo thaum hmo ntuj.