Crop faktor.Chto oko yaye kubaluleke kangakanani xa ukhetha ngekhamera yedijithali.

Crop factor - igama idityaniswe imiqathango dictionary lokufota ukuvela kunye nokusetyenziswa kwezi isizukulwana esitsha lekhamera. Kuphuhliso ezintsha zobuchwephesha mihla emarikeni yaqala ukubonakala iikhamera ngakumbi SLR ledijithali ngendleko lufikeleleke nonprofessionals. kubathengi ezinjalo, ukongeza ixabiso, bahlule ngaphandle kokuba olunye udidi, apho icamera ekhethiweyo - linani nefilimu. Nefilimu ukuba ngandlel 'ndicinge phandle, kunye nokunikezela nalezo, yintoni ngokwenene baqonde ukuba okukhona icebo ngcono. Noko ke, njengoko kanti, enye ebalulekileyo uphawu uphawu ngokuyahlula phakathi kwicamera yesuntswana, into izityalo. Phambi kokuba uthenge ikhamera, ukuma ukuze wazi ukuba yintoni na.

Zimbalwa amateurs ubuncinane kanye wazibuza ukuba kutheni, ukuba lens ilens ngokumila setyhula, kwisakhelo ngelo xesha linye bathathe uxande? Akukho okunzima kwi impendulo yalo mbuzo akukho. Ejonge umfanekiso izithombe kwabeendaba ikhamera, i-optic lens wazinqumla nje ingxenye "extra" womfanekiso, amnike imilo yoxande. Kuyinto elula kakhulu ekuveliseni umboniso equka uthotho izakhelo buxande, yaye ekwenzeni imifanekiso, kunye nokumiswa kunye nezinye compact, kwaye isebenziseka.

Ngenxa ukusetyenziswa ixesha elide ifilimu imifanekiso ubungakanani yesakhelo kwi umboniso kuqhubeka kusetyenziswa ubukhulu reference. nokuba Akukho namnye lungenzeki ukuyitshintsha Nangoku, xa sokudubula ifilimu phantse yinto elidlulileyo. Namhlanje, kunye ukulawula ka photo sokudubula lwedijithali isizalo ezikhethekileyo, leyo kulingane kuthelekiswa leyo nefilim.

Isizalo, oko kukuthi ubungakanani isakhelo umboniso ahambelanayo, ekuthiwa elizeleyo isakhelo. Noko ke, inkoliso iikhamera SLR lwedijithali matrix kunye ubukhulu elincinci kakhulu. Ngokwemvelo matrices eso bachukunyiswa kuphela indawo esembindini yomfanekiso eyayiza ukuya isizalo ngokupheleleyo. Ngokweliso, kubonakala ngathi izithombe njengesakhelo lens kokuba ubude ixesha elide focal.

Ngenxa yoko kwabakho ibinzana ukuthi ichaza "ukwanda 'ubude focal, nto leyo ngokwenene eyenzekayo, ngokuba apha, njengokuba kumzekelo wethu lens ngeenxa zonke, nje ndinqumle inxalenye engaphandle yesakhelo. In IsiNgesi igama elithi "isityalo" (isityalo) liguqulelwe ngokuthi "kunqunyulwa". Ngenxa yoko igama elithi - nomba izityalo, nto leyo ebhekisela loo nto bandiswe ubude. Ngokuchanekileyo uchaza ngexesha elinye, enyanisweni kukho inkqubo ngokudubula, njengoko ngengqiqo elibonakalayo, kwekhamera ubude akawatshintshi loo manqaku, kodwa ukutshintsha kuphela abone ngayo.

Ngenxa yoko, isakhelo Isanti 35 umboniso timillimetrovoy iye 24x36 mm kwaye ihlala reference, leyo ngoku adityaniswe factor yezityalo. Kuba isakhelo loo nto ilingana 1. Ekuqaleni kweli xesha, Nikon ukufota yedijithali ngobulumko wagqiba ukuba sinako ukuvelisa iikhamera SLR lwedijithali kunye nesakhono uzisebenzise kunye ngokukhanya yakudala, leyo ezenziwe eminyaka yaye ngokufuthi ibize ngaphezu lwecamera ngokwayo.

Nangona kunjalo, kunye ukuphunyezwa kwalo mbono sinengxaki. Yenza isivamvo ngokupheleleyo-ubude yaba zibiza kakhulu, kwaye incinane nje kakhulu kwakungekho ingongoma.

Ngenxa ephanda woluvo sele lusekiwe, nto leyo oxwesileyo kunye namaxesha nesiqingatha ngaphantsi isakhelo 35 timillimetrovoy film. Ngoko ke, ngokuba zincwadi Womenzi onjalo 1.5 - oku factor isityalo sakhe. Canon, ngengozi, kamva wafumana isisombululo elingcono. Crop factor nesamagumbi ayo abe ilingana no 1.6.

Ukuze ezahlukeneyo ngandlel kuye, ngumba isivuno Nikon waqalisa ukubiza i-DX, kwaye ngokupheleleyo-ubude isivamvo FX. encoding efana kuyaqhubeka ukuba zikhona namhlanje. Oku kusetyenziswa ezinye iinkampani ezininzi, ngaphandle Nikon.

Abenzi angu kunye factor izityalo, yiyiphi indawo zokuva zabo lehle ngaphezu kwesiqingatha. Oku kubangele ukonga ekwenziweni ngokukhanya enamandla yaye kubize. Abavelisi baqalisa ukuvelisa izixa ubunzima cameras digital ziyafumaneka ukuze uluhlu olubanzi abafoti.