Akwai wasu maganganun da dole ne mu fahimta kuma mu fahimta idan muna son zama ɓangare na duniyar ɗaukar hoto ta hanya mai mahimmanci da ƙwarewa. Idan kana gabatar da kanka cikin wannan duniyar, ya kamata ka san waɗanne ɓangarorin hakan banmamaki na'urar da zaka yi amfani da ita don aiwatar da ayyukanka.
Da farko zamuyi magana akan abubuwa biyu masu mahimmanci kuma masu yanke hukunci: Mai rufewa da diaphragm.
Obturation:
Ana bayyana shi sau da yawa ta hanyar da ba ta dace ba azaman "saurin rufewa" a cikin kyamarori. Mai rufewa shine na'urar da ke sarrafa adadin lokacin da haske zai buge firikwensin kyamararmu. Ana iya saita wannan lokacin faɗakarwa a cikin ƙimomi kuma kowane tsalle tsakanin kowane ɗayan waɗannan ƙimar ana kiran sa mataki. Wadannan dabi'u yawanci suna tsakanin 30 seconds da 1/8000 na biyu a cikin kyamarori masu ƙarfi. Zamu iya rarrabe nau'ikan lokutan rufewa:
- Periodsananan lokutan rufewa: Galibi basu wuce dakika 1/60 ba kuma a cikin waɗannan rufewar ya kasance a buɗe don wani ɗan gajeren lokaci don haka zai sa ƙarancin haske ya wuce zuwa firikwensinmu. Sakamakon zai kasance koyaushe sakamakon daskarewa, ma'ana, sanannen raguwar motsi.
- Dogon lokacin rufewa: Yawancin lokaci sun fi sakan 1/60. A wannan halin, mai rufewa ya kasance a buɗe tsawon don haka mafi yawan haske ya faɗi ta ciki. Lokacin da aka yi amfani da lokuta masu tsayi, abin da ake nema shine fatalwar sakamako, ko kuma wannan yana ba mu motsin motsi. Duk lokacin da muka yi amfani da lokaci mai tsayi zai zama mai kyau a yi amfani da masarufi, kamar yadda kowane motsi, komai ƙanƙantar da shi, na iya samun babban sakamako a kan hotunanmu.
Diaphragm da f-lambobi:
A diaphragm ne mai na'urar samar da ruwan tabarau na ikon ƙididdige adadin haske shiga cikin dakin Dogaro da matakin buɗewa ko rufewa, mafi girma ko ƙarami adadin haske zai ratsa. Kowane ɗayan matsayin wannan na'urar an bayyana ta lambar f, wanda shine rabo tsakanin tsaka mai tsayi da kuma buɗewa da kuma diaphragm. Kamar yadda zaku gani, diaphragm yana bin tsari irin na idris na idonka wanda yake daidaita adadin hasken da yake shiga da fita.
Lambobin f sune masu zuwa kuma ana samun su ta hanyar lissafin lissafi wanda aka samu ta hanyar ninka 1 da 1,4 zuwa 2., kodayake suma suna iya bayyana azaman sulɓi: 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22 ...
1 X 2 = 2, 2 x 2 = 4, 4 X 2 = 8, 8 X 2 = 16, 16 X 2 = 32 ko 2, 4, 8, 16, 32 don samun sauran dole ne kayi haka da 1,4 , 1.4 kuma zaka samu 2.8, 5.6, 11, 22, XNUMX ...
Kodayake wannan ra'ayi yana da zurfin zurfin gaske, musamman daga hangen nesa na kimiyya da lissafi a wannan lokacin kuma idan kuna shiga ciki, sanin ma'anarsa da tasirinsa a cikin lamuran aiki akan aikinmu a matsayin masu ɗaukar hoto zasu isa.
