Uyisebenzisa kanjani iFlash yakho ngokukuko kwimifanekiso (Icandelo lesi-5 kwelesi-5)

Ngu-Matthew L Kees, undwendwe kwi-Blog ye-MCP

UMlawuli weMLKstudios.com Ikhosi yeFoto ekwi-Intanethi [MOPC]

Sebenzisa iflash kumgama ("phezulu kwizikweri ezantsi…")

Umgama weFlash-to-subject awusoloko ungumba ngaphakathi, ngaphandle kokuba ukhanyisa isibane esiphakamileyo okanye wena kwindawo enkulu ye-BIG, njenge-cathedral. Ngaphandle kwiindawo ezivulekileyo, inokuba yinto ebonakalayo kwisethingi sakho kunye noseto lwekhamera.

Ifleshi yakhiwe malunga neXenon egcwele ityhubhu. Umbhobho ujongeka njengebhalbhu encinci ye-fluorescent ebekwe ngaphakathi kwisibonisi. Umsebenzi wekhombisi kukuthumela ukukhanya kwicala elinye. Kodwa, ikwafuna ukuyisasaza ngaphandle okanye inokuba kukukhanyisa kuphela indawo elingana nefestile.

Xa ukukhanya kuhamba kude kudanyaza kuyasasazeka ngendlela yoxande. Zombini ukuphakama nobubanzi bemilo kuyonyuka. Njengoko isasazeka ikwahla ngamandla. Ukukhanya kokukhanya kuyawa kusetyenziswa into eyaziwa ngokuba yi-Inverse Square Law. Ngamagama alula i-Inverse Square Law ithetha ukuba ukukhanya kuqaqambe kufutshane nomthombo kodwa kuphulukana nobunzulu bayo kumgama-kusetyenziswa ifomula, omnye kumgama ophindwe kabini.

Imathematics yoMthetho oPhambeneyo weSikwere kwaye kutheni kubalulekile:

Ngomxholo olishumi leenyawo kude, ukukhanya kweflash kuwela kwi-1/100 yeyenye inyawo kude. Kwiinyawo ezingama-20, iyehla iye kwi-1/400 kwaye kwii-40 iinyawo ukukhanya kuwele kwi-1 / 1600th yamandla ayo okuqala. Ukuba uzama ukutyhala ukuya kwiinyawo ezingama-50, isifundo sakho siya kufumana i-1 / 2500th kuphela yokukhanya-enye ibe ngaphezulu kweshumi elinamacala amahlanu.

Kukwanjalo ukuba ubamba ukukhanya kwisilingi engama-20 ukuphakama. Umgama opheleleyo xa ukukhanya kufuneka uhambile ubuncinci iinyawo ezingama-40 ukuya kufikelela kwisilingi uze ubuyele kwisifundo sakho. Izihloko zifumana ngaphantsi kwe-1 / 1600th ye-flash's intensity nokuba zimi iinyawo ezintathu kuphela kude.

Ukuba ufuna ukudubula ngeflash usuka kude, qala uvule ukuvula kwakho ukuvumela ukukhanya okungakumbi kungene, kwaye okwesibini wandise i-ISO ngesizathu esinye sokuphakamisa i-ISO kufuna ukukhanya okungaphantsi xa ungasebenzisi iflash.

Ukuba isifundo sakho sikude ngokwenene, kungafuneka ususe ifleshi kwisihlangu eshushu kwaye usisebenzise kwimowudi ekude. Yenza umntu abambe i-flash kufutshane nesihloko sakho okanye ayinyuse kufutshane kwisitandi.

Qaphela ukuba BONKE ukukhanya kuyawa kusetyenziswa lo mthetho-ukukhanya, i-strobes, izibane zasekhaya, kunye nokukhanya kwelanga. Kodwa ukukhanya kwelanga kukude kangangokuba olunye unyawo okanye ezimbini, okanye iimayile ezininzi azibonakali ekukhanyeni kwawo. Ukuthambeka komhlaba kunye nokuma kwawo elangeni kuyatshintsha, kodwa ke amaxesha ethu onyaka.