Zithini iiFocal Lens eziqhelekileyo? Ziziphi izinto ekufuneka ziqwalaselwe xa ukhetha iModeli?

1,Ziziphi ii-focal lengths ezisetyenziswa rhoqo kwiilensi zemizi-mveliso?

Kukho ubude obuninzi be-focal obusetyenziswa kwiiilensi zoshishinoNgokubanzi, uluhlu oluhlukeneyo lobude be-focal lukhethwa ngokweemfuno zokudubula. Nazi ezinye zemizekelo eqhelekileyo yobude be-focal:

A.Ubude befocal obuyi-4mm

Iilensi zolu bude befocal zilungele kakhulu ukudubula iindawo ezinkulu kunye nomgama okufutshane, njengeendawo zokusebenzela zasefektri, ii-warehouse, njl.

B.Ubude befocal obuyi-6mm

Xa kuthelekiswa nelensi yobude be-focal ye-4mm, le lensi yobude be-focal inde kancinci, ifanelekile kwiziganeko ezinkulu kancinci. Izixhobo ezininzi ezinkulu zoshishino, ezifana nezixhobo zoomatshini abanzima, imigca yemveliso emikhulu, njl.njl., zingasebenzisa ilensi ye-6mm.

C.Ubude befocal obuyi-8mm

Ilensi ye-8mm inokufota izigcawu ezinkulu, njengomgca omkhulu wemveliso, indawo yokugcina izinto, njl. Kufuneka kuqatshelwe ukuba ilensi enobude obufanayo inokubangela ukuphazamiseka komfanekiso kwizigcawu ezinkulu.

Ilensi yemizi-mveliso yokudubula iziqendu ezinkulu

D.Ubude befocal obuyi-12mm

Xa kuthelekiswa nelensi yobude be-focal ye-8mm, ilensi ye-12mm inoluhlu olubanzi lokudubula kwaye ifanelekile ngakumbi ukusetyenziswa kwiindawo ezinkulu.

E.Ubude befocal obuyi-16mm

Ilensi yobude obuyi-16mm yilensi yobude obuphakathi, efanelekileyo yokudubula kumgama ophakathi. Ingasetyenziselwa ukudubula iindawo ezithile zomzi-mveliso, ezinje ngoomatshini, izixhobo, njl.njl.

F.Ubude befocal obuyi-25mm

Ilensi engama-25mm yilensi ye-telephoto, efanelekileyo ngakumbi ekufotweni umgama omde, njengokudubula umbono obanzi wefektri yonke ukusuka kwindawo ephakamileyo.

G.Ubude obuyi-35mm, 50mm, 75mm kunye nezinye ii-focal lengths

Iilensi ezifana ne-35mm, 50mm, kunye ne-75mm ziilensi ezinde ze-focal length ezinokusetyenziselwa ukufota izakhiwo zoshishino ezikude, okanye ukufota ii-macro (umgama osondeleyo kakhulu) ukuze kuthathwe iinkcukacha ezithe vetshe kumfanekiso.

2,Ziziphi izinto ekufuneka ziqwalaselwe xa ukhetha iilensi zemizi-mveliso?

Xa ukhethailensi yemizi-mveliso, ezi zinto zilandelayo kufuneka ziqwalaselwe:

A.Iimfuno zesicelo

Ngaphambi kokuba ukhethe ilensi, misela ukuba loluphi uhlobo lwelensi olufunekayo kusetyenziso lwakho. Kuba usetyenziso olwahlukeneyo lufuna iintlobo ezahlukeneyo zeeparameter ezifana nokuvula, ubude befocal kunye nommandla wokujonga.

Umzekelo, ngaba ufuna ilensi ebanzi okanye ilensi ye-telephoto? Ngaba ufuna ingqwalasela ezinzileyo okanye amandla okusondeza? Ezi zimiselwa ngokusekelwe kwiimfuno zesicelo.

Khetha iilensi zoshishino ngokusekelwe kwiimfuno zesicelo

B.Iiparameters ezibonakalayo

Imbobo, ubude befocal kunye nebala lokujonga zonke ziiparameter ezibalulekileyo zelensi. Imbobo imisela ubungakanani bokukhanya okudluliselwa yilensi, kwaye imbobo enkulu inokufezekisa umgangatho ongcono womfanekiso kwiimeko zokukhanya okuphantsi; ubude befocal kunye nebala lokujonga zimisela ibala lokujonga kunye nokukhulisa umfanekiso.

C.Umfanekisorisisombululo

Xa ukhetha ilensi, kufuneka ukhethe ilensi efanelekileyo ngokusekelwe kwiimfuno zesisombululo somfanekiso. Isisombululo selensi kufuneka sihambelane neepikseli zekhamera ukuqinisekisa imifanekiso esemgangathweni ophezulu.

D.Umgangatho we-optical welensi

Umgangatho we-optical welensi umisela ngokuthe ngqo ukucaca kunye nokuguqulwa komfanekiso. Ke ngoko, xa ukhetha ilensi, kufuneka ucinge ngelensi evela kuphawu oluthembekileyo ukuqinisekisa ukusebenza okuzinzileyo kwe-optical.

E.Ukulungelelaniswa kwendalo

Xa ukhetha ilensi, kufuneka uqwalasele neemeko zokusingqongileyo zesicelo sakho. Umzekelo, ukuba indawo yesicelo inezinto ezifana nothuli, ukufuma, okanye ubushushu obuphezulu, kufuneka ukhethe ilensi engangeni thuli, engangeni manzi, kwaye engangeni bushushu obuphezulu.

F.Uhlahlo lwabiwo-mali lwelensi

Uhlahlo-lwabiwo mali yenye yezinto ezibalulekileyo ekufuneka uziqwalasele xa ukhetha ilensi. Iimpawu ezahlukeneyo kunye neemodeli zeelensi zinamaxabiso ahlukeneyo, ngoko ke qiniseka ukuba ukhetha ilensi efanelekileyo ngokwexabiso lakho.

Iingcinga Zokugqibela:

UChuangAn wenze uyilo lokuqala kunye nemveliso yeiilensi zoshishino, ezisetyenziswa kuzo zonke iinkalo zezicelo zoshishino. Ukuba unomdla okanye uneemfuno zeelensi zoshishino, nceda unxibelelane nathi ngokukhawuleza.