Lub koob yees duab diaphragm yog dab tsi?

Los ntawm kev yuav khoom ib lub koob yees duab zoo, tsis txhob tso tseg ntawm cov txheej txheem. Nyob rau hauv tsab xov xwm no, peb yuav piav qhia txog yam kev ua haujlwm xws li qhov qhib qhov ncauj qhov ntswg, thiab yuav siv nws cov peev xwm li cas.

Lub cev, lub koob yees duab diaphragm yog cov petals uas npog lub lens thiab cia nyob rau hauv ib qho nyiaj ntawm lub teeb. Qhov zoo dua lub lens, cov nplaum ntxiv yog ntsia rau ntawm nws, thiab tus smoother cov nyhuv loj yog tiav. Peb yuav tsis qhia rau hauv cov lus dab tsi tau, tab sis peb yuav qhia txhua yam kom meej meej.

Cov duab no nthuav tawm cov me nyuam, thiab tom ntej siab ib muag cov duab yuav luag zoo tib yam. Tab sis nyob rau ntawm thawj daim duab peb pom meej meej tus me nyuam tub nyob rau hauv keeb kwm yav dhau, thiab nyob rau hauv lub thib ob - tus keeb kwm yav dhau ntawm tus ntxhais yog tag nrho qhov muag plooj. Tsuas nco ntsoov tias qhov no tsis yog txhais tau tias qhov siab tshaj plaws ntawm qhov muag plooj, thiab nws tsis muaj peev xwm ua kom tiav tib qho nyhuv (hauv Photoshop).

Tam sim no peb tau piav qhia txog tias lub koob yees duab qhov qhib qhov teeb meem nyob hauv ob qho tib si. Nyob hauv thawj daim duab, lub diaphragm kaw, yog li peb pom cov duab tag nrho kom meej meej. Hauv daim duab thib ob, daim diaphragm yog qhib ntau dua, vim li cas tus tub tsis tuaj yeem pom. Peb tau kuaj qhov no thiab nws yog tseeb rau peb tias nrog lub siab tshaj plaws qhib aperture peb tau txais ib qhov muag plooj keeb kwm, thiab nrog lub qhov kaw, nws yog tseeb.

Nyob rau hauv yuav luag txhua tus neeg, lub aperture rau ntawm lub koob yees duab yog qhia tias yog "f /" thiab daim duab, uas qhia tias qhov kev sib txawv ntawm qhov sib txawv ntawm qhov sib txawv. Thaum xub thawj nws yuav nyuaj rau koj nco ntsoov tag nrho cov kev tsim txiaj, yog li nws txaus los paub tias me dua tus naj npawb, ntau tshaj qhov keeb kwm ploj, thiab ntau tshaj - qhov zoo dua cov khoom nyob hauv keeb kwm yav dhau los pom. Cov duab hauv qab no qhia txog tus nqi tseem ceeb uas muaj nyob rau hauv cov thawv xoom qhwv ntsej muag. Koj pom tias lub diaphragm hloov li cas ntawm cov ntsuas.

Txawm tias muaj tseeb hais tias cov nuj nqi ntawm lub diaphragm feem yog tam sim no nyob rau hauv compact koob yees duab, ua tau tom qab plooj rau lawv tsis yooj yim sua. Yuav kom nkag siab qhov txawv, nws yog txaus sim sim tawm lub iav thiab cov koob yees duab. Ntseeg kuv, qhov sib txawv ntawm qhov zoo yuav pom tau rau lub qhov muag liab qab. Tau, thiab muaj pes tsawg tus ua haujlwm, qhov chaw koj yuav ua kom zoo siab. Tsis txhob rush kawm txhua yam ntawm ib zaug thiab thawj xam txhua parameter nyias, thiab tom qab uas xaiv hom kev ceev thiab txuas lawv.

Hauv daim duab nrog lub ladybug, koj tuaj yeem pom tseeb tias cov diaphragm qhib tag nrho. Xws li ib daim duab tuaj yeem nrog rau cov khoom siv, tsis hais seb yog hom twg - Nikon, Canon. Lub koob yees duab, uas yog ib qho tseem ceeb, yuav tsum yog daim iav los yog kev ua haujlwm.

Nyob rau hauv xaus, nws yuav tsum tau hais tias lub koob yees duab tus aperture yuav tsom rau ib yam khoom, highlighting nws thiab blurring tus keeb kwm yav dhau. Nyob rau hauv daim duab saum toj no nrog lub ladybug, cov nyhuv no yog qhia meej, vim tias koj pom xwb ib kab, thiab so tsis tseem ceeb ua luaj. Kaw cov diaphragm ntawm lub koob yees duab yog tsim nyog rau cov duab ntawm txoj kev, kev ua si, neeg coob, qhov twg nws xav tau kom tag nrho cov duab yuav tsum ua kom pom tseeb.

Thaj li, tsis yog txhua yam yog li nyuaj thaum nws pom thaum xub thawj, tab sis ua ntej koj yuav pib kawm ntxiv txog cov kos duab ntawm photography, xyaum zoo ntawm cov theem no.