Kuthetha ntoni "ukukhawuleza" xa uthetha kwiilensi?
Amashishini amaninzi asebenzisa ulwimi lwazo lwamazwi, imiqathango engenalo intsingiselo kwenye indawo, i-buzzwords, izichazi zezixhobo, ubuchwepheshe okanye ubuchwepheshe obuthetha nje into kubo. Imveliso yevidiyo ayifani.
Lo mbhali wangena kwimveliso yevidiyo ekuqaleni kwee-2000s, ngokukhawuleza ngexesha ledijithali liqalise ukwenza ukuthungatha kwi-tape engapheliyo, okanye ubuncinci banciphise kakhulu. Ukuyalelwa ukuba uthathe ividiyo kwiofisi eyenza amaphephancwadi, kwakungekho naontanga abanokubongoza, abaqhubi okanye abahleli ukuba bacele uncedo. Okushiye iindlela ezimbalwa: iincwadi kunye ne-intanethi.
Ewe, ukufunda indlela yokudubula nokuhlela kwakucacile. Kukho izixhobo, kwakukho ubuchule kwaye kwakukho iindlela ezichanekileyo zokungafezekisi imisebenzi. Xa andizange ndiyiqonde ukuba yiliphi igama okanye isichazamazwi esimele xa ifika kwiikhamera kunye nokudutshulwa, ndingayisebenzisa iGoogle, okanye nokuba ndifunde nje ukuba yintoni iqhosha okanye isilungiselelo esenzayo kwaye sishiye kuyo.
Ngelishwa oko kuthetha ukuba mna, njengabathandi abaninzi bevidiyo abafundisayo abazifundayo, bafunda isigama sesigama kwi-fly.
Omnye wemigqaliselo esetyenziswa ngokuqhelekileyo kodwa engabonakali ngokucacileyo kwintetho xa ebhekisela kwilensi "yokukhawuleza". Kuthetha ntoni "ukukhawuleza" xa uthetha kwiilensi?
Ewe, kukho izinto ezimbalwa kwikhamera ekwazi ukukhawuleza, kodwa eli gama libhekiselele ekugqibeleni kwelo lensi. Ikhudlwana ukuphakanyiswa kwekhamera, ukukhanya okugqithiseleyo okuye kuvulelwe kwikhono lomfanekiso wekhamera.
Ngoko, indlela elula yokujonga ngokukhawuleza kunye neengcingo ezicothayo kukuqwalasela ukuba i-lens yokuzila ivumela ukukhanya ngakumbi kwaye i-lens epholileyo ivumela ukukhanya okungaphantsi.
Ngoko kuthetha ukuthini ukusho ngokukhawuleza? Ewe, ukuvulwa kwe-lens bubungakanani bendawo evulekileyo, okanye isithintelo, ngaphakathi kwilensi. Oku kulukhudlwana kule ndawo kukuba, ukukhanya okugqithiseleyo kudlula i-lens. Yenza ingqiqo, h?
Ububanzi bentsholongwane buboniswe kuthi ngokusebenzisa inombolo-f , efana ne f / 1.8 okanye f / 4.0. Le nombolo-f ibhekiselele kumbalo weemathematika, kwaye ngelixa singayi kungena kuyo, kusenza sikwazi ukusebenzisa iilensi zamakhilomitha ahlukeneyo ahlukeneyo kwaye sazi ukuba siya kuba nexabiso elifanayo lokuchasana.
Ngoko nantsi indlela inomboro-f isebenzayo ngayo: Inombolo ephantsi ye-f, inombolo evulekileyo. Njengoko sifunde kwangaphambili, i-width isithuba, ukukhanya okugqithiseleyo kufinyelela kwi-sensor. Ukukhanya okugqithisileyo okufika kwintloko, ngokukhawuleza i-lens. Khangela amanani aphantsi e-f / 1.2, f / 1.4 okanye f / 1.8.
Ngakolunye uhlangothi, ephakamileyo inombolo ye-f, encinci ukuvula. Ukukhutshwa okuncinci kuthetha ukukhanya okungaphantsi kokungena kwilenjini ukuya kwi-sensor. Ezi iilensi ezihamba ngokukhawuleza ziya kuba nama-f-manani amakhulu, afana ne-f / 16 okanye f / 22.
Le ngcaciso yonke imnandi kwaye yintoni, kodwa kutheni amanye amavolontiya abethandazelayo ngeenzuzo zama-lens okukhawuleza? Ewe, zimbalwa izizathu ezilungileyo.
Iyokuqala ukubonisa ukukhanya kokukhanya. Ukukhanya okungakumbi kuvumela ukuba inzwa yenze umsebenzi ngaphandle kokufumana indawo emnyama. Ukukhanya okungakumbi kuthetha ukungabi ne-ISO ukuze ugcine umfanekiso oqaqambileyo, kwaye njengoko ufumene ngoku, iziphumo eziphezulu ze-ISO ziphumela kwingxolo yomsindo.
Enye inzuzo kukuba ithambileyo, imvelaphi yembonakalo esiyibonayo kwiiprot pro. Ukuphuma kwimvelaphi yeyona nto kuyimpembelelo enqwenelekayo, kwaye kulula kakhulu ukufezekisa nge-lens yokuzila.
Ukukhupha okukhulu, iilensi ezikhawulezayo zivumela abaqhubi ukuba basebenzise isantya sokuvala ngokukhawuleza, kuba ukukhanya ukufikelela kwi-sensor kukhulu. Oku kunokukunceda ukunciphisa ukunyakaza kokuhamba.
I-Sidenote: xa uphendulelwa phezulu, tshela f / 2.8 kwilenki ekhupha ngaphandle kweso sihlalo, abaninzi abahlaseli baya kubhekisela kulo "njengokuvuleka okuvulekileyo". Ukuba uhlala usetiwe kwaye umlawuli uncomeka ukudubula "evulekileyo" ukuzisebenzisa ngokunjalo imeko yokukhanyisa, vele ubeke ikhamera yakho kwindawo ephezulu, kwaye uya kubeka zonke.