Yog tias koj yog tus kiv cua ntawm kev yees duab thiab tau ua qhov kev lag luam no tau ntau xyoo, tom qab ntawd koj twb tau muaj peev xwm nrog cov lus hais ntawm kev yees duab science xws li aperture, photosensitivity, lossis shutter ceev. Raws li txoj cai, feem ntau cov koob yees duab uas muaj nyob rau hauv cov khw muag khoom yog nruab nrog kev hloov kho tsis xws li cov qauv no: ib lub photocell tsim rau hauv lub cev, uas ntsuas cov tsis tsim nyog thiab, thaum koj nias lub kaw, teeb tsa cov nqi no thaum tua. Ib txhia hais tias tag nrho cov kev teeb tsa no yog qhov qub thiab tshiab thev naus laus zis tau coj lawv tus xov tooj.
Nws yog qhov tsim nyog
Lub koob yees duab nrog lub peev xwm los hloov qhov aperture thiab shutter ceev
Cov Lus Qhia
Kauj ruam 1
Txhawm rau kom koj nce mus rau qhov nrawm, Kuv xav piav qhia qhov shutter ceev thiab aperture zoo li cas. Tawm raug hais txog lub sijhawm nws yuav siv los hloov tus duab rau hauv matrix lossis zaj duab xis. Aperture yog hais txog qhov loj ntawm qhov qhib (hauv lub lens) yuav tsum tau xa cov duab. Qhov tseeb, tsis muaj ib yam nyuaj hais txog nws. Txhawm rau kom nkag siab txog 2 nqe lus no, nws txaus los xav txog lub koob yees duab lub ntsej muag raws li qhov muag tib neeg ua. Piv txwv li, koj sib sau nyob ntawm txoj kev, tawm hauv kev nkag mus, thiab lub hnub ci ci tuaj rau koj qhov muag tsis pom kev. Koj yuav ua li cas tom qab tshem koj txhais tes tawm ntawm koj lub qhov muag? Koj zaum thiab koj cov menyuam yuav nqaim. Yog li tus menyuam kawm ntawv tsis muaj dab tsi ntau tshaj li cov diaphragm ntawm koj lub qhov muag.
Kauj ruam 2
Thaum tus kawm qaim dhau, qhib. " Ib qho piv txwv ntawm cov lus tsis tseeb: "txo aperture" = teeb tsa tus nqi qis dua "lej". Aperture yog tus zauv feem, yog li 8 txhais tau tias 1/8. "Txo cov aperture" txhais tau tias kaw nws, teeb tsa tus nqi: 8, 16, 22, 36.
Kauj ruam 3
Teem lub koob yees duab pib nrog teeb tsa qhov muaj nqis nkag siab. Tom qab ntawd koj yuav tsum nrhiav qhov piv "aperture - kaw lub nrawm". Tom qab ntawd, cov kev kawm raug tsom xyuas thiab nias zaum kawg ntawm khawm kaw.
