一,Iintlobo zeeLensi zeKhamera zoKhuseleko:
Iilensi zekhamera zokhuseleko ziza ngeentlobo ezahlukeneyo, nganye yenzelwe ukuhambelana neemfuno ezithile zokujonga. Ukuqonda iintlobo zeelensi ezikhoyo kunokukunceda ukhethe efanelekileyo yokuseta ikhamera yakho yokhuseleko. Nazi iintlobo eziqhelekileyo zeiilensi zekhamera yokhuseleko:
1,Ilensi eQinisekileyo: Ilensi ezinzileyo inobude obuthile kunye nebala lokujonga, elingenakulungiswa. Lukhetho olungabizi kakhulu olufanelekileyo ukujonga indawo ethile ngaphandle kwesidingo sokulungiswa rhoqo. Iilensi ezizinzileyo ziyafumaneka ngobude obahlukeneyo bokujonga, nto leyo ekuvumela ukuba ukhethe ibala lokujonga olifunayo.
2,Ilensi yeVarifocal: Ilensi ye-varifocal inikezela ngobude obuhlengahlengiswayo befocal, ekuvumela ukuba utshintshe intsimi yokujonga ngesandla. Ibonelela ngokuguquguquka ekulungiseni inqanaba le-zoom kwaye ifanelekile kwiimeko apho indawo yokujonga inokutshintsha okanye ifune amanqanaba ahlukeneyo eenkcukacha. Iilensi ze-varifocal zihlala zisetyenziswa kwiimeko apho kufuneka ubuchule obuhlukeneyo, njengokujonga ngaphandle.
3,Ilensi yokusondeza:Ilensi yokusondeza inika amandla okulungisa ubude befocal kunye nebala lokujonga kude. Ivumela zombini i-optical zoom kunye ne-digital zoom. I-optical zoom igcina umgangatho womfanekiso ngokulungelelanisa izinto zelensi, ngelixa i-digital zoom iwandisa umfanekiso ngedijithali, nto leyo ebangela ukulahleka komgangatho womfanekiso. Iilensi zokusondeza zisetyenziswa rhoqo kwizicelo apho ukujonga kude kunye nokukwazi ukubamba iinkcukacha ezincinci kubalulekile, njengakwiindawo ezinkulu zangaphakathi okanye ngaphandle.
4,Ilensi ebanzi: Ilensi ene-engile ebanzi inobude obufutshane bokugxila, nto leyo ebangela umbono obanzi. Ifanelekile ukujonga iindawo ezinkulu okanye iindawo ezivulekileyo apho ukubamba umbono obanzi kubalulekile khona. Iilensi ezine-engile ebanzi zisetyenziswa kakhulu kwiimeko zokujonga ezifana neendawo zokupaka, iindawo zokugcina impahla, okanye ukujonga umjikelezo wangaphandle.
5,Ilensi yeTelephoto: Ilensi ye-telephoto inobude obude be-focal, inika indawo yokujonga encinci kunye nokukhulisa okukhulu. Ilungele ukujonga ixesha elide okanye iimeko apho ukubamba iinkcukacha ezithile kude kubalulekile. Iilensi ze-telephoto zihlala zisetyenziswa kwizicelo ezinje ngokuqaphela ipleyiti yelayisensi, ukuchongwa kobuso, okanye ukujonga iindawo ezibalulekileyo kude.
6,Ilensi yePinhole:Ilensi yemingxuma yilensi ekhethekileyo encinci kakhulu kwaye ingabonakali. Yenzelwe ukuba ifihlwe ngaphakathi kwezinto okanye kumphezulu, okuvumela ukujongwa ngokufihlakeleyo. Iilensi zemingxuma zihlala zisetyenziswa kwiimeko apho ikhamera kufuneka ifihlwe okanye ingabonakali, njengakwii-ATM, iingcango, okanye imisebenzi yokujonga ngokufihlakeleyo.
二,Ungayikhetha njani iLens eBalaseleyo kwiKhamera yakho yoKhuseleko?
Ukukhetha ilensi efanelekileyo kwikhamera yakho yokhuseleko linyathelo elibalulekileyo ekuqinisekiseni ukusebenza kakuhle kunye nokuthatha ividiyo esemgangathweni ophezulu. Nazi ezinye izinto ekufuneka uziqwalasele xa ukhetha ilensi:
Uhlobo lwekhamera:Misela uhlobo lwekhamera yokhuseleko onayo okanye oceba ukuyithenga. Iintlobo ezahlukeneyo zekhamera, ezifana ne-bullet, i-dome, okanye i-PTZ (i-pan-tilt-zoom), zinokufuna iintlobo okanye ubungakanani beelensi ezithile.
Ubude beFocal: Ubude befocal bumisela intsimi yokujonga kunye nenqanaba le-zoom. Bulinganiswa ngeemilimitha (mm). Khetha ubude befocal obufanela iimfuno zakho ezithile. Nazi ezinye iindlela eziqhelekileyo:
Ilensi ebanzi(2.8mm ukuya kwi-8mm): Ibonelela ngebala elibanzi lokujonga, elifanelekileyo ukugubungela iindawo ezinkulu okanye ukujonga iindawo ezibanzi.
Ilensi esemgangathweni (8mm ukuya kwi-12mm): Inika umbono olungeleleneyo ofanelekileyo kwiisicelo zokujonga ngokubanzi.
Ilensi yeTelephoto (12mm nangaphezulu): Ibonelela ngebala elimxinwa lokujonga kodwa inika amandla amakhulu okusondeza ukujonga ixesha elide okanye ukusondela okuneenkcukacha.
Intsimi yokujonga (i-FOV): Cinga ngendawo ofuna ukuyijonga kunye nenqanaba leenkcukacha ezifunekayo. Intsimi ebanzi yokujonga iluncedo kwiindawo ezinkulu ezivulekileyo, ngelixa i-FOV encinci ingcono kwiindawo ezithile ezijoliswe kuzo ezifuna ukujongwa ngokusondeleyo.
Imbobo: I-aperture imisela amandla okuqokelela ukukhanya kwelensi. Imelwe yinombolo ye-f (umz., f/1.4, f/2.8). Inombolo ye-f ephantsi ibonisa i-aperture ebanzi, evumela ukukhanya okungakumbi ukuba kungene kwilensi. I-aperture ebanzi iluncedo kwiimeko zokukhanya okuphantsi okanye ekuthatheni imifanekiso ecacileyo ebumnyameni.
Ukuhambelana kweSensor yoMfanekiso: Qinisekisa ukuba ilensi iyahambelana nobukhulu besenzi somfanekiso sekhamera yakho. Ubungakanani obuqhelekileyo besenzi somfanekiso buquka i-1/3″, 1/2.7″, kunye ne-1/2.5″. Ukusebenzisa ilensi eyenzelwe ubungakanani besisenzi obuchanekileyo kunceda ukugcina umgangatho womfanekiso kwaye kuthintele ukubhidlika okanye ukugqwethwa komfanekiso.
I-Lens Mount: Jonga uhlobo lokufakelwa kwelensi olufunekayo kwikhamera yakho. Iintlobo eziqhelekileyo zokufakelwa ziquka ukufakelwa kwe-CS kunye nokufakelwa kwe-C. Qinisekisa ukuba ilensi oyikhethayo iyafana nohlobo lokufakelwa kwekhamera.
Ilensi yeVarifocal vs. Fixed:Iilensi zeVarifocal zikuvumela ukuba ulungise ubude befocal ngesandla, zibonelela ngokuguquguquka kokutshintsha intsimi yokujonga njengoko kufuneka. Iilensi ezizinzileyo zinobude befocal obumiselweyo kwaye zibonelela ngentsimi yokujonga esisigxina. Khetha uhlobo olufanelekileyo ngokusekelwe kwiimfuno zakho zokujonga.
Uhlahlo lwabiwo-mali:Cinga ngohlahlo lwabiwo-mali lwakho xa ukhetha ilensi. Iilensi ezikumgangatho ophezulu ezineempawu eziphambili zinokuba zibiza kakhulu kodwa zinokubonelela ngomgangatho ongcono womfanekiso kunye nokuqina.
Umenzi kunye noPhononongo:Phanda abavelisi abaziwayo abagxile kwiilensi zekhamera zokhuseleko. Funda uphononongo lwabathengi kwaye ufumane iingcebiso ukuqinisekisa ukuba ukhetha imveliso ethembekileyo nehloniphekileyo.
三,Ukukhetha ilensi yokujonga ngaphakathi nangaphandle: Yintoni umahluko?
Xa ukhetha ilensi yokujonga ngaphakathi okanye ngaphandle, kukho umahluko obalulekileyo ekufuneka uqwalaselwe ngenxa yeempawu ezahlukeneyo zezi ndawo. Nantsi into ekufuneka uyazi:
Iimeko zokukhanyisa:Iindawo zangaphandle zihlala zineemeko ezahlukeneyo zokukhanya, kuquka ukukhanya kwelanga okukhanyayo, izithunzi, kunye neemeko zokukhanya okuphantsi ebusuku. Kwelinye icala, iindawo zangaphakathi zihlala zineemeko zokukhanya ezilawulwa ngakumbi kunye nokukhanya okuhlala kuhleli. Ke ngoko, ukhetho lwelensi kufuneka luqwalasele imingeni ethile yokukhanya kwindawo nganye.
Ngaphandle:Khetha ilensi enendawo ebanzi (inombolo ephantsi ye-f) ukuze ufumane ukukhanya okungakumbi kwiimeko zokukhanya okuphantsi. Oku kuqinisekisa ukubonakala okungcono kunye nomgangatho womfanekiso ngexesha lokutshona kwelanga, ukusa, okanye ebusuku. Ukongeza, iilensi ezinezakhono ezilungileyo zobubanzi obuguqukayo zinokusingatha umahluko phakathi kokukhanya kwelanga okukhanyayo kunye neendawo ezimnyama ngokufanelekileyo.
Ngaphakathi: Ekubeni iindawo zangaphakathi zihlala zinezibane ezifanayo, iilensi ezineembobo eziphakathi zinokwanela. Ilensi enenombolo ye-f ephezulu kancinci isenokubonelela ngomgangatho olungileyo womfanekiso kwiindawo zangaphakathi ngaphandle kwesidingo sokuvuleka okubanzi.
Intsimi yokujonga:Indawo yokujonga efunekayo inokwahluka ngokusekwe kubukhulu kunye noyilo lwendawo yokujonga.
Ngaphandle: Iindawo ezingaphandle ngokubanzi zifuna indawo ebanzi yokujonga ukuze zijonge iindawo ezinkulu ngokufanelekileyo. Iilensi ezibanzi zihlala zisetyenziselwa ukubamba umbono obanzi, ngakumbi kwiindawo ezivulekileyo ezifana neendawo zokupaka okanye izakhiwo zangaphandle.
Ngaphakathi: Indawo yokujonga ngaphakathi ingahluka ngokuxhomekeke kwindawo ethile ejongiweyo. Kwezinye iimeko, ilensi ebanzi ingafaneleka ukugubungela igumbi elikhulu okanye ipaseji. Nangona kunjalo, kwiindawo ezixineneyo okanye apho kufuneka khona ukujonga ngokweenkcukacha, ilensi enentsimi yokujonga encinci okanye ukukwazi ukulungisa ubude be-focal (i-varifocal lens) ingakhethwa.
Ukumelana nemozulu: Iikhamera zokujonga ngaphandle kunye neelensi kufuneka zenzelwe ukumelana neemeko zemozulu ezinzima, ezifana nemvula, ikhephu, uthuli, okanye amaqondo obushushu aphezulu. Kubalulekile ukukhetha iilensi ezenzelwe ngokukodwa ukusetyenziswa ngaphandle, ezihlala ziza nezinto ezimelana nemozulu ezifana nezivalo ezivaliweyo ukukhusela ukufuma kunye nenkunkuma.
Ukumelana nokonakalisa:Kwiindawo ezingaphandle, kukho umngcipheko ophezulu wokonakalisa okanye ukuphazanyiswa. Cinga ngeelensi ezineempawu zokukhusela ezifana neekhabhathi okanye iidome ezimelana nokuchaphazeleka ukuze uthintele umonakalo kwaye uqinisekise ukuba ukusebenza kwekhamera kunye nomgangatho womfanekiso azichaphazeleki.
Ukuhambelana kwe-IR:Ukuba inkqubo yakho yokujonga ibandakanya ukukhanya kwe-infrared (IR) ukuze ubone ebusuku, qiniseka ukuba ilensi iyahambelana nokukhanya kwe-IR. Ezinye iilensi zinokuba nesihluzo se-IR-cut ukuphucula umgangatho womfanekiso emini ngelixa zivumela ukukhanya kwe-IR okusebenzayo ebusuku.
Ixesha lokuthumela: Julayi-05-2023
