Njengoko isihloko sisitsho,iilensi ze-varifocalzilungele ukufotwa kwezilwanyana zasendle kwaye okwangoku zezona zikhetho zidumileyo zeelensi ekufotweni kwezilwanyana zasendle. Ukuguquguquka kobude befocal, isantya sokugxila, kunye nokuzinziswa komfanekiso weelensi ze-varifocal kuvumela abafoti ukuba bathathe ngokukhawuleza amaxesha adlulayo ezilwanyana ngelixa begcina umgama okhuselekileyo, nto leyo ebenza bakwazi ukujongana neendawo zasendle ezintsonkothileyo nezitshintsha rhoqo.
1.Iingenelo eziphambili zeilensi ye-varifocales zokudubula izilwanyana zasendle
(1)Akukho mfuneko yokutshintsha iilensi rhoqo: Izilwanyana zasendle zihlala zingabonakali lula, kwaye ungaphoswa yifoto ebalulekileyo ukuba utshintshela kwilensi egxile kwingqwalasela esisigxina. Ukusebenzisa ilensi ye-varifocal kukuvumela ukuba ubhale umfanekiso ngokukhawuleza ngokulungelelanisa ubude befocal, njengokutshintsha ukusuka kwimbono ye-panoramic ukuya kwi-close-up, ngaphandle kokutshintsha iilensi.
(2)Iyahambelana neemfuno ezahlukeneyo zokudubula: Usebenzisa ilensi ye-varifocal, ungasebenzisa isiphelo se-telephoto (esifana ne-200mm nangaphezulu) ukufota izilwanyana ezikufutshane, okanye usebenzise isiphelo se-telephoto esiphakathi (esifana ne-70-100mm) ukufota imifanekiso yezilwanyana kunye nokusingqongileyo, ubonisa imiboniso yendalo.
(3)Nciphisa umthwalo wezixhobo: Xa kuthelekiswa nokuphatha iilensi ezininzi ezigxileyo (ezifana ne-300mm, 400mm, 600mm), ilensi enye ye-telephoto varifocal (efana ne-200-600mm) inokugubungela ubude obuninzi be-focal, inciphise ubunzima obuthwalwa kwaye iququzelele ukulandelela nokudubula umgama omde endle.
(4)Nciphisa ubunzima bokudubula: Xa udubula izilwanyana endle, kudla ngokuba yimfuneko ukuhlala ufihliwe, nto leyo eyenza kube nzima kubafoti ukusondela kwizilwanyana. Isiphelo se-telephoto selensi ye-varifocal singasetyenziselwa ukudubula umgama okhuselekileyo, siphephe ukuphazamisa izilwanyana, sinciphise ubunzima bokudubula, kwaye siqinisekise ukhuseleko lomntu.
Iingenelo zokusebenzisa iilensi ze-varifocal ukufota izilwanyana zasendle
2.Indlela yokukhethailensi ye-varifocalifanelekile ukufota izilwanyana zasendle?
Ukufota izilwanyana zasendle kukwaneemfuno ezithileiilensi ze-varifocal; ayizizo zonke iilensi ze-varifocal ezifanelekileyo. Ezi parameter zilandelayo kufuneka ziqwalaselwe ngononophelo:
(1)Fubude be-ocal
Ubude befocal yeyona nto ibalulekileyo xa ukhetha ilensi ye-varifocal; ubude obude befocal buthathwa ngcono xa kufotwa izilwanyana zasendle. Abaqalayo badla ngokukhetha ubude befocal obuyi-70-300mm okanye i-100-400mm, obufanelekileyo xa kufotwa izilwanyana ezinkulu ezingenaloyiko okanye kumgama okufutshane, nto leyo evumela ulungelelwano phakathi kwefotografia yezilwanyana kunye neyomhlaba.
Uninzi lwabafoti abaziingcali bakhetha ubude obufana ne-200-500mm okanye i-150-600mm, efanelekileyo ekufotweni kwezilwanyana ezincinci okanye iintaka zikude. Ezinye iilensi ziyahambelana nee-teleconverters, zandisa ubude obufana ne-800mm okanye i-1200mm, nto leyo enika amandla amakhulu e-telephoto.
(2)Imbobo
Ubungakanani be-Aperture bukwayindlela ebalulekileyo ekufuneka uyiqwalasele xa ukhetha ilensi ye-varifocal. Iilensi ze-aperture eziguquguqukayo ezifana ne-f/4.5-5.6 kunye ne-f/5-6.3 zilula kwaye zifikeleleka lula, nto leyo eyenza ukuba zibe lukhetho kubantu abaninzi. Nangona kunjalo, zine-apertures ezincinci kwisiphelo se-telephoto, ezifuna amanqanaba aphezulu okukhanya.
Iilensi zokuvula ezihlala zihleli, ezifana ne-f/2.8 kunye ne-f/4, zinika ukusebenza okunamandla kodwa zibiza kakhulu kwaye zinzima. Ukuvula okukhulu kwandisa ukungena kokukhanya, kuqinisekisa isantya esikhawulezayo sokuvala, kuthintela imifanekiso engacacanga, kwaye kudala ubunzulu obunganzulu bentsimi, kugqamisa umxholo, njengezilwanyana.
I-Aperture yiparameter ebalulekileyo ekufuneka iqwalaselwe xa ukhetha ilensi ye-varifocal
(3)Ukuzinziswa komfanekiso kunye nokusebenza kwe-autofocus
I-TelephotoiilensiZithambekele ekubeni zingacaci ngenxa yokushukuma kwekhamera, nto leyo eyenza ukuzinzisa umfanekiso obonakalayo okwakhelwe ngaphakathi kube yinto ebalulekileyo! Ikunceda ukuba usebenzise isantya esicothayo sokuvala xa uthatha iifoto eziphathwayo ukuze ufumane iifoto ezibukhali. Kwangaxeshanye, inkqubo ye-autofocus ekhawulezayo nethuleyo elandelela ngokuchanekileyo izinto ezihambayo ibaluleke ngokulinganayo ekubambeni iintaka ezibhabhayo okanye ezibalekayo.
(4)Ubunzima kunye nokuphatheka lula
Ukudubula ngaphandle kudla ngokufuna ukuhamba ngeenyawo, kwaye ubunzima kunye nobukhulu belensi buchaphazela ngokuthe ngqo umthambo womzimba. Ukuba ufuna ukudubula xa uhamba umgama omde, kuya kufuneka ucinge ngoyilo olukhaphukhaphu lwelensi okanye usebenzise umzimba belensi ye-carbon fiber. Ukuba kuyimfuneko, kuya kufuneka usebenzise i-tripod okanye i-monopod ekhaphukhaphu.
Ubunzima kunye nokuphatheka kakuhle zizinto ekufuneka ziqwalaselwe kwiilensi ze-varifocal.
(5)Ukumelana nemozulu kunye nokuthembeka
Xa kufotwa endle, ukumelana kwemozulu yelensi nako kufuneka kuqwalaselwe. Ilensi isebenzisa uyilo lwangaphakathi lwe-zoom (ubude belensi abutshintshi xa kufikwa kwi-zoom) ukunceda ukugcina iziko elizinzileyo lomxhuzulane kwaye inika ukhuseleko olungcono lothuli kunye nokufuma; ulwakhiwo olumelana nothuli kunye nokuvuza kwamanzi lunokuhlala luthembekile kwiindawo ezinzima ezifana namahlathi emvula kunye nemifuno.
Ukuququmbela,iilensi ze-varifocal, ngenxa yokuguquguquka kwazo, ukulula kwazo, kunye nokuzinzisa imifanekiso ebonakalayo, ziye zaba yenye yezona ndlela ziphambili zokukhetha iilensi zokufota izilwanyana zasendle.
Xa kufotwa, ukuguquguquka kwe-zoom kungasetyenziselwa ukujongana nokungaqikeleli kwezilwanyana, kudityaniswe nefuthe lokucinezelwa kwesiphelo se-telephoto ukugqamisa umxholo ngelixa kugcinwa ibali lokusingqongileyo; kunye ne-autofocus ekhawulezayo, iteknoloji yokuzinzisa umfanekiso, kunye nokwakheka okufanelekileyo, izinga lempumelelo yokufotwa kwezilwanyana zasendle linokuphuculwa kakhulu.
Ixesha leposi: Matshi 31-2026
