Xyaum txhua tus neeg niaj hnub ntsib qhov teeb meem nyuaj thaum xaiv lub koob yees duab digital. Yuav ua li cas xaiv nws kom tau txais cov duab zoo? Dab tsi txiav txim siab lub cev zoo ntawm daim duab? Peb yuav sim teb cov lus nug no yam tsis delving rau hauv cov subtleties. Tus nqi kos duab ntawm kev yees duab hauv kab lus no yuav tsis raug txiav txim siab.
Tus yam ntxwv ntawm lub koob yees duab digital yog tus naj npawb ntawm megapixels thiab qhov loj ntawm lub koob yees duab sensor
Dab tsi yog pixel thiab matrices? Lub matrix (lub ntsiab lus nrog lub sensor) yog lub voj voos tiaj tiaj uas hloov cov yeeb yaj kiab hauv lub koob yees duab qub thiab hloov cov duab uas nkag mus rau hauv lub lens rau hauv cov teeb liab hluav taws xob. Tom qab digitization, lub cuab yeej processor sau cov ntaub ntawv no rau hauv daim npav nco hauv daim ntawv. Pixels nyob ntawm lub matrix - cov ntsiab lus tseem ceeb lossis cov dots (microscopic photocells-transistors) los ntawm cov duab digital tsim. Lub megapixel yog ib lab pixels. Feem ntau cov neeg yuav khoom raug coj los ntawm qhov ntsuas no. Nws yog qhov pheej yig dua rau cov chaw tsim khoom siv digital los teeb tsa lub matrix tshiab nrog ntau tus lej megapixels hauv lawv lub cuab yeej thiab muab tso rau hauv ntau lawm.rov ua dua yuav luag tag nrho lub koob yees duab ntaus ntawv thiab muab nws nrog lub matrix loj. Yog li ntawd, nyob rau hauv lub khw, tus neeg muag khoom tsom rau tus neeg yuav khoom lub siab ntawm qhov ntsuas uas qhia txog tus lej megapixels, thiab tsis quav ntsej qhov loj ntawm lub koob yees duab matrix.
Dab tsi yog qhov ntau thiab tsawg ntawm cov sensors hauv cov koob yees duab sib txawv?
Qhov loj dua qhov pixel loj thiab (raws li qhov tshwm sim) lub matrix, daim duab zoo dua. Qhov loj pixel loj pom lub teeb zoo dua thiab pom cov xim ntau dua. Qhov me me ntawm pixel thiab matrix loj, qhov cuam tshuam ntau dua (suab nrov) hauv daim duab. Yog li ntawd, ntau megapixels tsis txhais hais tias cov duab zoo yuav zoo heev. Qhov loj ntawm matrix yog qhov parameter uas txiav txim siab qhov zoo ntawm cov duab thiab tus nqi ntawm cov cuab yeej. Cov duab hauv qab no qhia txog matrix ntawm lub koob yees duab reflex. Nws raug ntxuav los ntawm kev siv tshwj xeeb uas tau teeb tsa hauv lub koob yees duab. Kov lub matrix nrog ob txhais tes thiab txhua yam khoom yog qhov tsis txaus ntseeg kiag li. Nov yog txoj hauv kev ncaj qha rau nws qhov tsis ua tiav.
Dab tsi yog qhov loj ntawm lub koob yees duab matrices, nyob rau hauv cov koob yees duab lawv tau nruab?
Cov lus teb rau lo lus nug no yog hauv qab no.
Lub koob yees duab sensor qhov ntau thiab tsawg: rooj
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Format los yog ntiv tes kab pheeb ces kaum |
Lub cev loj, mm | Device piv txwv |
| FF (FullFrame), full frame | 36 × 24 | Nqis cov koob yees duab tshaj lij. Canon, Nikon, Sony, Leica |
| APS-C | 23, 5 × 15, 6 | Nikon dav dav DSLRs,Canon, Sony |
| APS-C | 22, 3 × 14, 9 | Dav dav DSLRs Canon, Sony, qib siab mirrorless |
| 4/3" lossis Micro 4/3 | 17, 3 × 13, 0 | mirrorless dav nqi ntau Panasonic, Olympus |
| 1" | 12, 8 × 9, 6 | Nikon, Samsung thiab cov koob yees duab compact siab heev |
| 1/2, 3" | 6, 16 × 4, 62 | Ntau cov xab npum ntxhua khaub ncaws |
| 1/3" | 4, 69 × 3, 52 | Smartphone koob yees duab |
koob yees duab tswv yim
Yog tias koj xaiv lub koob yees duab los ntawm ntau lub cuab yeej los ntawm tus lej ntawm megapixels, ces nws yog qhov tsim nyog los ua qhov kev txiav txim zaum kawg tom qab koj pom tias qhov loj npaum li cas matrices tau teeb tsa hauv lawv. Kev xaiv yuav tsum tau ua kom pom zoo ntawm lub koob yees duab uas lub sensor loj tshaj plaws tau teeb tsa.
Yog tias koj xav tua lub koob yees duab nrog lub sensor loj, koj yuav tsum tso nws qhov loj thiab qhov hnyav. Tom qab tshuaj xyuas kev lag luam rau cov koob yees duab, nws pom tseeb tias tsis muaj cov koob yees duab me me thiab pheej yig puv npo tsis tau. Thiab cov khoom siv yees duab loj ntawm lub xov tooj ntawm tes raug txwv hnyav los ntawm qhov me me ntawm matrix.
Yog tias koj tsis xav ua tus kws yees duab tshaj lij, ces koj yuav tsum tsis txhob siv nyiaj rau lub koob yees duab kim nrog lub sensor loj. Cov koob yees duab pheej yig pheej yig tshaj plaws (niaj hnub xab npum tais diav) yuav tiv nrog txoj haujlwm no tsis yog qhov phem tshaj qhov zoo nkauj. DSLRs thiab yuav txaus siab rau koj nrog kev txhaj tshuaj zoo.
Tsis txhob hnov qab tias cov koob yees duab hauv cov xov tooj smartphones niaj hnub no kuj muaj qhov tsis zoo, uas txaus los tsim cov duab zoo sai sai.
Hauv kev xaus, peb nco ntsoov tias ntau yam cuam tshuam rau daim duab zoo. Qhov tseem ceeb tshaj plaws ntawm lawv yog kev tshaj lij ntawm tus kws yees duab. Thiab cov lus pom zoo uas lub koob yees duab txias yog tus yuam sij rau cov duab zoo nkauj tsuas yog deb ntawm qhov tseeb raws li qhov tseeb tias tus kws kos duab tus txhuam hniav kim yog qhov lav ntawm kev tsim cov khoom zoo. Lub koob yees duab tsuas yog ib qho cuab yeej xwb. Tus neeg siv daim duab, tsis yog lub koob yees duab. Txawm li cas los xij, nws yog ib qho nyuaj rau nrhiav tau ib qho pheej yig xab npum tais hauv arsenals ntawm cov kws yees duab nto moo. Kev xaiv yog koj li.
