Isisiseko sabafoti: Shutter, isantya se shutter, ukuvula kunye f- #

shutter-uvalo

Kukho iikhonsepthi ezithile ekufuneka siziqonde kwaye siziphathe kakuhle ukuba sifuna ukuba yinxalenye yehlabathi lokufota ngendlela enzulu neyobungcali. Ukuba uzazisa kweli hlabathi, kuya kufuneka uyazi ukuba ngawaphi loo macandelo ngummangaliso isixhobo oza kusisebenzisa ukwenza umsebenzi wakho.

Ukuqala siza kuthetha ngezinto ezimbini ezibalulekileyo neziqinisekileyo: I-shutter kunye ne-diaphragm.

Ubungqina:

Ihlala ichazwa ngendlela engachanekanga njenge "santya sokuvala" kwiikhamera. Ishutter sisixhobo esilawula ubungakanani bexesha apho ukukhanya kuyakubetha khona inzwa yekhamera yethu. Eli xesha lokuvezwa linokusetwa kumaxabiso kwaye ukutsiba ngakunye phakathi kwala maxabiso kubizwa ngokuba linyathelo. Ezi zixabiso zihlala zihlala phakathi Imizuzwana engama-30 kunye ne-1/8000 yesibini kwezona khamera zinamandla. Singahlula zimbini iintlobo zamaxesha eshutter:

  • Amaxesha amafutshane okushutha: Zihlala zingaphantsi kwemizuzwana eyi-1/60 kwaye kwezi shutter zihlala zivulekile okwexeshana elifutshane kakhulu kuyakuvumela ukukhanya okuncinci kudlule kwivensi yethu. Isiphumo siya kuhlala siyimpembelelo yomkhenkce, oko kukuthi, ukunciphisa okubonakalayo ekuhambeni.
  • Ixesha lokuvala ixesha elide: Zihlala zinde kune-1/60 imizuzwana. Kule meko, i-shutter ihlala ivulekile ixesha elide ukuze ukukhanya okukhulu kuwele. Xa kusetyenziswa ixesha elide lokuvezwa, yintoni efunekayo sisiphumo somoya, okanye oko kusinika imvakalelo yokuhamba. Nanini na xa sisebenzisa ixesha elide lokuvala, kuyacetyiswa ukuba sisebenzise i-tripod, njengoko yonke intshukumo, nokuba incinci kangakanani, inokuba neziphumo ezihle kwimifanekiso yethu.

ikhamera-ngaphakathi

Idayaphragm kunye neenombolo ze-f:

Idayaphragm sisixhobo esinika iilensi ze ukukwazi ukulinganisa inani lokukhanya engena egumbini. Kuxhomekeke kwinqanaba lokuvula okanye lokuvala, ukukhanya okukhulu okanye okungaphantsi kokukhanya kuya kungena. Isikhundla ngasinye kwesi sixhobo sichazwa ngenani f, elingumlinganiso ophakathi kobude bokugxila kunye nobubanzi bokuvula kwidayaphragm. Njengoko uza kubona, uvalo lulandela inkqubo efanayo naleyo iliso lakho elawula ubungakanani bokungena nokungena.

Amanani f ngala alandelayo kwaye afunyanwa kuthotho lwezibalo olufunyanwa ngokuphindaphinda u-1 no-1,4 ngesi-2, nangona zinokubonakala njengeqhezu: 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 okanye 2, 4, 8, 16, 32 ukufumana ezinye kufuneka wenze okufanayo no-1,4 , 1.4 kwaye uza kufumana i-2.8, 5.6, 11, 22, XNUMX ...

Nangona le ngcamango inobunzulu obukhulu ngakumbi, ngakumbi ngokwembono yesayensi kunye neyemathematika ngalo mzuzu kwaye ukuba uyangena kuyo, ukwazi intsingiselo yayo kunye nefuthe layo ngokubonakalayo emsebenzini wethu njengabafoti kuya kuba ngaphezulu ngokwaneleyo.

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