Lub koob yees duab: Nws yog dab tsi thiab nws ua haujlwm li cas?

by kim Kho tshiab: Lub rau hli ntuj 26, 2022

Introduction

Lub koob yees duab yog ib qho cuab yeej kho qhov muag siv los ntes cov duab tseem lossis sau cov kev txav mus los hauv ib lub thav duab lossis ib ntu ntawm cov thav ntawv. Nws muaj lub lens uas sib sau ua ke lub teeb thiab tsom nws mus rau lub teeb-sensitive nto xws li zaj duab xis los yog cov duab sensor. Cov koob yees duab tau siv los ntawm cov kws yees duab, cov neeg tsim yeeb yaj kiab, thiab lwm tus kws tshaj lij los ntes cov duab ntawm lub ntiaj teb nyob ib puag ncig lawv.

Hauv kab lus no, peb yuav tshawb nrhiav lub koob yees duab yog dab tsi thiab nws ua haujlwm li cas.

Txhais lub koob yees duab

Lub koob yees duab yog ib qho khoom siv uas ntes lub teeb los tsim cov duab. Nws ua haujlwm los ntawm kev txais lub teeb los ntawm ib qho khoom lossis qhov chaw thiab khaws cia, xws li cov duab digital lossis lub cev ntawm lub cev, ntawm qhov nruab nrab tsim nyog. Cov koob yees duab siv lo ntsiab muag tsom lub teeb no mus rau sensors lossis zaj duab xis thiaj li yuav kaw qhov chaw.

Txawm hais tias lub tswv yim ntawm kev yees duab yog qhov yooj yim, thev naus laus zis hauv qab lub koob yees duab tau txhim kho thiab txhim kho ntau lub sijhawm los ntawm cov khoom siv me me siv hauv lub neej niaj hnub mus rau high-end digital koob yees duab siv hauv kev yees duab thiab tshaj tawm xov xwm. Cov koob yees duab yog siv nyob rau hauv ob qho tib si tseem ncej thiab txav dluab daim ntaub ntawv, xws li filmmaking.

Cov ntsiab lus tseem ceeb ntawm txhua lub koob yees duab digital niaj hnub ua haujlwm ua ke los sau cov duab:

• A lens system sib sau ua ke thiab tsom teeb pom kev tawm ntawm cov ntsiab lus mus rau cov duab sensor uas sau lub teeb rau hauv cov ntaub ntawv digital.
• An kho qhov muag tso cai rau cov neeg siv pom dab tsi yuav raug kaw.
• Kev Siv Tshuab txav lub lens lossis zaj duab xis.
• Khawm, tswj thiab ntau qhov chaw raug tso cai rau cov neeg siv los tswj kev ntes thiab raug teeb tsa.

Ntau hom koob yees duab

Cov koob yees duab tuaj nyob rau hauv ntau yam duab thiab ntau thiab tsawg. Nyob ntawm seb lawv xav siv, ntau hom koob yees duab muaj, suav nrog cov koob yees duab digital, yees duab yees, koob yees duab pov tseg, Web koob yees duab thiab cov koob yees duab soj ntsuam.

Cov koob yees duab Lub koob yees duab digital ntes cov duab ua cov ntaub ntawv (cov ntaub ntawv digital). Nws feem ntau muaj cov khoom siv duab (sensor) thiab muaj peev xwm khaws cov ntaub ntawv ntawd rau ntawm daim npav nco lossis lwm qhov nruab nrab cia. Cov koob yees duab digital muab kev yooj yim rov qab thiab saib ua ntej ntawm cov duab nrog rau lub peev xwm xa lawv hauv tshuab hluav taws xob los ntawm lub computer network lossis internet. Point-and-shoot qauv tuaj yeem ua me me kom haum rau hauv hnab ris thiab muaj peev xwm ua kom pom tseeb thaum tseem pheej yig. Rau kev siv kev tshaj lij, cov qauv siab dua nrog kev tswj hwm ntawm kev raug kis tau muaj thiab.

Video Cameras Kuj hu ua camcorders los yog video recorders, cov cuab yeej no tau tsim tshwj xeeb rau kev tua cov duab suab uas suab kaw nrog rau cov duab. Cov cuab yeej tshaj lij suav nrog cov lo ntsiab muag kev ua tau zoo rau kev ua kom zoo dua qub, txuas ntxiv zoom ntau yam thiab muaj peev xwm ua tau tshwj xeeb rau kev sib sau xov xwm lossis kev ua yeeb yaj kiab. Cov qauv me me yog qhov zoo rau kev ua yeeb yaj kiab hauv tsev lossis kev ua si lom zem nrog cov roj teeb txuas ntxiv.

Cov koob yees duab pov tseg Cov koob yees duab siv ib zaug no tsis tas yuav muaj lub zog siv hluav taws xob - lawv ua haujlwm yam tsis muaj lub zog sab nraud xws li cov roj teeb lossis cov khoom siv hluav taws xob - ua rau lawv nrov heev ntawm cov neeg siv khoom nrhiav tus nqi qis dua lwm txoj hauv kev los ntes cov kev nco yam tsis muaj kev txi ntawm cov duab zoo nkauj. Hom koob yees duab no feem ntau los preloaded nrog zaj duab xis uas tsis tuaj yeem raug tshem tawm ntawm lub koob yees duab lub cev; ib zaug tag nrho cov kev yees duab tau tas lawm ces cov cuab yeej no yuav siv tau tag nrho ntawm lawv tus tswv behest cia nws / nws tsuas muab pov tseg thaum nws tsis tas yuav tsum tau / xav tau ntxiv.

Web Cameras Kuj tseem hu ua "web cams" cov tshuab kaw suab digital no txuas ncaj qha los ntawm USB chaw nres nkoj mus rau lub laptop / desktop computers muab cov neeg siv sib txuas ua haujlwm zoo li lub sijhawm video streaming ntxiv rau cov duab thaij duab xa ncaj qha rau hauv pab pawg kev pabcuam thiab lwm yam.

Kev Soj Ntsuam Cov Koob Yees Duab Niaj hnub no thoob plaws hauv tsev, pej xeem cov nuj nqis, lub tsev complexes, khw muag khoom, thiab lwm yam vim digitizing thev naus laus zis kev soj ntsuam cov tshuab tau tam sim no tau txais qib siab ntawm kev ua tau zoo muab cov neeg ua haujlwm ruaj ntseg paub meej txog ntau yam tshwm sim ua kom muaj kev nyab xeeb yog tias xav tau. Feem ntau hais lus, muaj ob yam tseem ceeb: Analogue CCTV (Closed Circuit Television) uas siv cov khoom siv hluav taws xob feem ntau whereas network IP kev daws teeb meem siv tus qauv ethernet raws tu qauv txuas nrog thoob plaws cheeb tsam network. Cov tsev nyob hauv tsev tsis suav nrog cov ntawv thov sab nraum zoov cov kev ua haujlwm siab heev stealts kev teeb tsa ua haujlwm tso cai rau kev soj ntsuam ob qho tib si thaum nruab hnub thiab lub sijhawm hmo ntuj mus tas li.

Basic Cheebtsam ntawm lub koob yees duab

Lub koob yees duab yog lub cuab yeej tseem ceeb rau kev ntes cov nco thiab lub sijhawm uas koj tuaj yeem txaus siab rau xyoo tom ntej. Cov koob yees duab tuaj nyob rau hauv ntau daim duab thiab qhov ntau thiab tsawg thiab tag nrho lawv yog tsim los ntawm cov khoom sib txawv uas ua haujlwm ua ke kom koj cov duab ua tau.

Saib ntawm lub cov khoom tseem ceeb ntawm lub koob yees duab thiab lawv ua haujlwm li cas los tsim cov duab uas koj nyiam:

lens

Lo ntsiab muag yog ib qho tseem ceeb tshaj plaws ntawm lub koob yees duab. Lub lens yog qhov tseem ceeb ntawm lub qhov muag ntawm lub koob yees duab - nws yuav siv sij hawm hauv daim duab thiab tsom nws los tsim cov duab ntawm zaj duab xis lossis digital sensor. Lenses muaj ntau lub ntsiab lus, feem ntau yog ua los ntawm iav lossis yas, uas ua haujlwm ua ke kom tso cai rau lub teeb kom dhau mus thiab tsim cov duab ntse ntawm zaj duab xis lossis digital sensor.

Lub koob yees duab lo ntsiab muag tuaj yeem siv nrog cov ntxaij lim dej thiab lub kaus mom los tswj cov teeb pom kev zoo thiab tseem muaj ntau yam nta xws li autofocus, zoom peev xwm thiab phau ntawv hloov kho. Lenses kuj tseem muaj ntau qhov ntev focal ntev uas txiav txim siab deb npaum li cas ntawm qhov kev kawm koj tuaj yeem nyob thaum thaij duab lawv. Qhov ntau thiab tsawg yog los ntawm 6mm super-fisheye lo ntsiab muag rau cov duab hemispherical, mus txog 600 hli telephoto rau daim ntawv thov loj loj. Cov lo ntsiab muag sib txawv yuav muaj qhov sib txawv apertures uas txiav txim siab npaum li cas lub teeb nkag los ntawm lawv thiab ceev npaum li cas shutter yuav tsum tau txav mus rau hauv kev txiav txim kom tsim nyog tus nqi ntawm lub teeb mus ntaus koj zaj duab xis lossis digital sensor.

Muaj ntau hom lo ntsiab muag muaj xws li:

• Dav lub lo ntsiab muag
• Telephoto lo ntsiab muag
• Portrait / txheem lo ntsiab muag
• Fisheye lo ntsiab muag
• Macro / micro lo ntsiab muag
• Hloov / qaij-ua haujlwm lo ntsiab muag
• Thiab ntau ntxiv cov kev xaiv tshwj xeeb tsim los rau cov xwm txheej tshwj xeeb.

Shutter

cov shutter yog lub tshuab nyob rau hauv lub koob yees duab uas tswj ntev npaum li cas lub sensor nyob rau hauv lub koob yees duab raug rau lub teeb. Cov koob yees duab digital niaj hnub no feem ntau siv kev sib xyaw ua ke ntawm a mechanical thiab electronic shutter. Qhov no ua rau lub sijhawm nws siv rau koj lub koob yees duab thaij duab thiab pab txhim kho qhov ntse ntawm koj cov duab, tshwj xeeb tshaj yog cov uas tau coj los rau hauv cov teeb pom kev tsawg.

cov mechanical shutter yog tsim los ntawm ob lub hlau lossis yas hniav uas ua haujlwm ua ke los tswj lub teeb pom kev zoo npaum li cas los ntawm txhua lub sijhawm. Thaum koj nias lub pob ntawm koj lub koob yees duab, cov hniav no qhib, tso cai rau lub teeb nkag los ntawm lub lens thiab mus rau ib qho duab sensor. Thaum koj tso lub khawm, cov hniav no kaw dua kom tsis muaj teeb pom kev ntxiv.

cov hluav taws xob shutter ua hauj lwm txawv heev los ntawm nws cov mechanical counterpart nyob rau hauv hais tias nws tsis siv tej lub cev Cheebtsam nyob rau hauv thiaj li yuav khiav lag luam - hloov nws tso siab rau hluav taws xob cov cim uas yog generated los ntawm lub computer algorithms. Los ntawm kev siv hom kaw no, nws muaj peev xwm rau cov koob yees duab kom muaj lub sij hawm nthuav tawm sai dua li yav dhau los - tso cai rau koj los ntes cov xwm txheej nrog ntau qib ntawm kev nthuav dav thiab meej dua li yav dhau los!

Ntxiv nrog rau kev tswj lub sij hawm raug, shutters kuj tseem siv tau rau lwm lub hom phiaj xws li tsim cov suab tsis meej lossis lwm yam. muaj tswv yim los uas yog tsis yooj yim sua thaum thaij duab nrog cov koob yees duab zaj duab xis.

aperture

cov pauj yog lub qhov nyob rau hauv ib feem ntawm lub koob yees duab lub cev hu ua lub lens. Aperture tswj ntau npaum li cas lub teeb hla dhau, thiab tuaj yeem hloov kho los ntawm tus neeg siv txhawm rau tsim cov duab siab lossis qhov sib piv qis. Qhov loj ntawm qhov aperture tuaj yeem ntsuas tau F-nres, nrog cov lej me qhia qhov loj dua apertures (lub ntsiab lus ntau dua). Feem ntau, ib lub lens nrog me me F-nres tus lej raug xa mus rau "ceev ceev, "vim tias nws tuaj yeem tso lub teeb ntau dhau los sai dua li cov lo ntsiab muag nrog F-nres siab dua.

Aperture kuj cuam tshuam tob ntawm daim teb - Ntau npaum li cas ntawm ib daim duab yog ntse thiab ua kom pom tseeb ntawm ib lub sijhawm. Lub aperture loj (tsawg F-stop) yuav ua rau qhov tob tob ntawm qhov chaw thaum lub me me aperture (loj F-stop) yuav tsim qhov tob dua - lub ntsiab lus ntau ntawm cov ncej yuav ua kom pom tseeb ib zaug. Qhov no tseem tuaj yeem siv los ua kom muaj txiaj ntsig zoo thaum tsim cov ntsiab lus nthuav dav - piv txwv li, ua cov ntsiab lus sawv tawm ntawm lawv cov keeb kwm yav dhau los ntawm kev cuam tshuam los ntawm kev ua kom pom tseeb, lossis hloov pauv los ntawm kev muaj ob qho tib si pem hauv ntej thiab keeb kwm yav dhau los ntse thiab ua kom pom tseeb.

Sensor

Lub koob yees duab duab sensor yog lub cuab yeej lub hauv paus ntawm lub teeb-capturing zog. Ib lub koob yees duab digital lossis zaj duab xis yuav muaj ib qho. Lawv tuaj nyob rau hauv ntau qhov ntau thiab tsawg, los ntawm loj full-frame sensors uas yog tib qhov loj li 35mm zaj duab xis ncej, rau me me sensors qhov loj ntawm tus ntiv tes.

Lub sensor txoj hauj lwm yog los hloov lub teeb nkag mus rau hauv hluav taws xob teeb liab rau kev ua haujlwm ntxiv. Nyob rau hauv kev xyaum, ib tug sensor ntes lub teeb thiab generates ib tug analog voltage uas yuav tsum tau amplified thiab hloov dua siab tshiab rau hauv ib tug digital teeb liab kom yooj yim cia thiab ua.

Ob lub ntsiab ntawm lub sensor yog nws cov duab (ib ib pixel ntawm lub sensor) thiab nws microlenses (xyuas seb lub teeb ntau npaum li cas nyob rau hauv txhua qhov photosite). Kev sib xyaw ua ke ntawm ob lub ntsiab lus tso cai rau txhua tus photosites kom ntes tau qhov tseeb ntawm lub teeb ua ntej xa nws tawm mus ua tiav ntxiv. Tus nqi no txawv nyob ntawm seb yam xws li shutter ceev, aperture, ISO kev teeb tsa thiab lwm yam.

Tsis tas li ntawd, cov koob yees duab digital niaj hnub no feem ntau tuaj nrog qee yam suab nrov txo tshuab uas pab tshem tawm random streaks thiab smudges los ntawm cov duab digital ua ntej lawv tuaj yeem khaws cia lossis ua tiav ntxiv. Cov thev naus laus zis no ua haujlwm los ntawm kev txheeb xyuas cov duab cov ntaub ntawv thiab tshem tawm cov ntaub ntawv tsis cuam tshuam uas tau khaws los ntawm lub koob yees duab sensors - tsuas yog ua pom cov duab meej.

Viewfinder

Ib tug viewfinder yog ib qho ntawm cov khoom siv tseem ceeb ntawm txhua lub koob yees duab thiab yog ib qho cuab yeej siv los ua cov duab ua ntej thaij duab. Nws tuaj yeem siv tau ntau yam, los ntawm qhov yooj yim tshaj plaws kho qhov muag version nrog ib qho yooj yim magnifying lens thiab lub qhov rais mus rau ib tug complex hluav taws xob uas tso tawm kom pom ntawm lub koob yees duab LCD npo.

Lub luag haujlwm tseem ceeb ntawm lub qhov muag pom yog los pab cov kws yees duab khaws lawv cov kev txhaj tshuaj kom pom tseeb, tshwj xeeb tshaj yog thaum ua haujlwm nyob rau hauv qhov teeb meem tsis tshua muaj teeb meem lossis thaum lub shutter ceev. Nws kuj tso cai rau cov kws yees duab sau lawv cov duab kom raug ua ntej kev tua, xyuas kom lawv ntes tau qhov lawv xav tau hauv kev txhaj tshuaj.

Hom yooj yim tshaj plaws ntawm viewfinder muaj lub qhov rais kho qhov muag lossis lub lens me uas yooj yim thav duab qhov xav tau los ntawm lub koob yees duab lub cev lub lens thawj. Hom kev pom no muaj nyob rau ntawm point-and-shoot thiab lwm lub koob yees duab ruaj khov - nrog rau cov koob yees duab ib leeg-lens reflex (SLR) - thiab muab cov qauv yooj yim ntawm framing rau koj qhov kev kawm sai thiab raug.

Daim ntawv electronic, hu ua ib electronic viewfinder (EVF), hloov cov qauv kho qhov muag nrog cov uas siv cov kua siv lead ua kua (LCDs) los tso saib cov duab hauv hluav taws xob los ntawm lub koob yees duab lub cev daim iav qhov muag. Electronic viewfinders tuaj yeem muab cov txiaj ntsig tseem ceeb ntawm lawv cov kev sib tw ib txwm muaj xws li:

• Ntxiv kev daws teeb meem
• Adjustable diopter nqis
• Ua nyob rau hauv raug them nyiaj txiag tswj
• Embossing pab rau qee hom kev yees duab xws li kev ua haujlwm macro
• Txhim kho autofocusing peev xwm kom zoo dua cov khoom nrhiav qhov tseeb
• Kev paub lub ntsej muag muaj peev xwm - ib yam dab tsi tsuas yog muaj nyob rau hauv siab kawg digital SLRs
• Ntxiv rau ntau cov txiaj ntsig ntxiv tsis nquag cuam tshuam nrog kho qhov muag versions.

Lub Koob Yees Duab Ua Haujlwm Li Cas?

Lub koob yees duab yog ib lub cuab yeej siv los ntes thiab sau cov duab, feem ntau yog hauv daim ntawv digital. Tab sis lub koob yees duab ua haujlwm li cas? Ntawm nws lub hauv paus, lub koob yees duab siv qhov zoo ntawm txoj kev teeb pom kev tawm ntawm cov khoom. Nws ntes cov kev xav no thiab txhais lawv mus rau hauv cov duab los ntawm cov txheej txheem nyuaj ntawm lo ntsiab muag, cov ntxaij lim dej, thiab digital sensor.

Hauv tsab xov xwm no, peb yuav saib cov sab hauv ua haujlwm ntawm lub koob yees duab thiab yuav ua li cas nws thiaj li coj tau cov duab zoo nkauj:

Lub teeb nkag mus rau lub lens

Lub teeb nkag mus rau lub koob yees duab los ntawm lub lens, uas yog ib daim iav los yog yas uas yog nkhaus tshwj xeeb los tsom rau lub teeb rays thiab ua rau lawv sib npaug. Cov duab projected rau zaj duab xis los ntawm lub lens nyob ntawm ob yam - lub focal ntev thiab aperture loj. Focal ntev txiav txim siab npaum li cas ze los yog nyob deb ib yam khoom yuav tsum sawv nyob rau hauv thiaj li yuav ua kom pom tseeb, whereas aperture loj txiav txim siab npaum li cas lub teeb dhau los ntawm lub lens ntawm ib zaug.

Qhov loj ntawm lub koob yees duab sensor kuj tseem yuav cuam tshuam lub teeb nws tuaj yeem ntes tau ntau npaum li cas - cov sensors loj tuaj yeem ntes ntau lub teeb dua li cov sensors me. Lub sensor loj kuj tseem ceeb yog tias koj xav kom koj cov duab muaj qhov tob tob ntawm qhov chaw, vim qhov no txhais tau hais tias tsuas yog cov khoom hauv kev ua kom pom tseeb yog qhov ntse thaum txhua yam nyob sab nraud ntawm cheeb tsam no qhov muag plooj yog li koj tuaj yeem hais tau zoo dua koj qhov kev kawm.

Thaum lub teeb tau nkag los ntawm lub lens thiab tau tsom mus rau cov duab sensor lossis zaj duab xis, lub teeb no ces hloov mus rau cov ntaub ntawv hais txog xim, ci, thiab qhov sib piv. Cov ntaub ntawv no tuaj yeem siv los tsim cov duab uas muaj ntau lab pixels (duab ntsiab) uas ua ke ua ib daim duab tag nrho ntawm qhov peb tab tom pom.

Lub teeb hla dhau qhov aperture

Lub teeb hla dhau ntawm pauj, uas yog ib lub qhov ua nyob rau hauv lub lens. Qhov no tso cai rau lub teeb nkag mus thiab ntaus qhov twg cov duab sensor nyob. Cov diaphragm ntawm lub aperture pab tswj seb lub teeb yuav nkag mus npaum li cas. Nws ua kom paub tseeb tias muaj lub teeb txaus kom nws tuaj yeem ua tiav ntawm cov duab sensor thiab tseem ua raws li kev tawm tswv yim yuav ua li cas feem ntau qhov muag plooj lossis hauv cov khoom ua kom pom tseeb hauv kev txhaj tshuaj.

Cov koob yees duab feem ntau muaj lub xov tooj rau kev hloov pauv tus nqi aperture no, txo qis lossis nce nws raws li qhov txiaj ntsig koj tab tom nrhiav. Obviously, yog tias koj xav tau ntau lub teeb nkag mus rau hauv koj qhov kev txhaj tshuaj, qhib qhov aperture tus nqi thaum tsim bokeh ntawm dab tsi tsis nyob hauv koj qhov chaw tsom mus yuav tsum kaw lub diaphragm ntau dua.

Lub teeb hla dhau qhov uas hu ua glare tiv thaiv lim thiab mus rau cov duab sensor. Thaum lub teeb mus txog qhov no ntawm lub koob yees duab nws hloov mus rau hauv hluav taws xob lub zog thiab cov ntaub ntawv raws li cov ntaub ntawv digital muab koj cov duab xim kub thiab ISO chaw kom raug raws li koj cov xwm txheej tua nrog rau lwm yam kev tshaj lij nyob ntawm koj lub koob yees duab qauv.

Lub teeb yog tsom rau ntawm lub sensor

Thaum lub teeb dhau los ntawm lub koob yees duab lens, nws cuam tshuam cov ntsiab lus thiab tsom mus rau lub koob yees duab digital sensor. Qhov no yog hu ua 'capture'. Lub sensor muaj ntau lab tus microscopic, lub teeb-rhiab pixels (lossis photosites) ua los ntawm silicon photodiodes nyob ntawm txhua qhov chaw pixel. Thaum lub teeb txaus poob rau ntawm pixel (lossis photosite), tus nqi tsim tawm uas yog tom qab ntawd hloov mus rau lub teeb liab hluav taws xob uas tuaj yeem ua tiav los ntawm lub computer. Nyob ntawm tus qauv, cov teeb liab no yuav tom qab ntawd hloov mus rau qhov pom lossis cov ntaub ntawv audio rau saib lossis ua si rov qab.

Txhua photosite nyob rau hauv cov duab sensor muaj nws tus kheej amplifier, uas ua rau kom tus nqi ntawm dynamic ntau yam los ntawm ib tug pixel, yog li txhim kho tag nrho cov duab zoo. Qee lub koob yees duab kuj suav nrog cov suab nrov txo cov algorithms ua ib feem ntawm lawv cov qauv tsim, kom txo cov teeb meem yuam kev thiab ua kom cov ntaub ntawv ntes tau raug.

Tus naj npawb ntawm pixels ntawm cov duab sensor plays lub luag haujlwm loj hauv kev txiav txim siab cov duab zoo; ntau pixels sib npaug rau cov duab daws teeb meem siab dua, thaum tsawg dua pixels feem ntau ua rau cov duab daws teeb meem qis dua nrog ntau cov nplej thiab suab nrov. Cov sensors loj dua feem ntau zoo dua dua li cov me me thiab muaj kev txhim kho dynamic ntau yam, zoo dua lub teeb kev ua tau zoo, thiab qhov tob tob-ntawm-teb rau kev ua haujlwm ntiav ntiav tswj cov teebmeem thaum xav tau.

Shutter qhib thiab kaw

cov shutter yog ib daim ntaub me me, nyias nyias uas qhib thiab kaw, tso cai rau lub teeb kaw los ntawm lub koob yees duab thaum lub sijhawm tshaj tawm. Lub shutter tswj ob qho tib si ntev npaum li cas thiab thaum twg lub teeb yuav dhau mus rau cov duab sensor. Hauv cov koob yees duab digital, muaj ob hom kev kaw: lub cev thiab digital.

Lub cev Shutters: Lub cev shutters qhib los yog kaw mechanically, feem ntau nyob rau hauv ib feem ntawm ib tug thib ob, tsim kom muaj ib tug raug uas yuav kav ntev npaum li cas. Nws yog feem ntau pom nyob rau hauv DSLR cov koob yees duab thiab zoo li ob lub ntsej muag uas tuaj yeem qhib lossis kaw manually lossis hauv tshuab hluav taws xob los tswj lub teeb npaum li cas mus txog lub koob yees duab cov duab nti.

Digital Shutters: Digital shutters ua haujlwm txawv ntawm cov tshuab kaw vim tias lawv tsis siv lub cev thaiv kom tso rau hauv lub teeb - hloov lawv. cuam ​​tshuam txoj kev pom lub teeb pom hauv hluav taws xob los ntawm kev tua sai sai tom qab kuaj pom nws rau lub sijhawm txwv. Cov txheej txheem no tsim kev nthuav tawm nrog a ntev dua li qhov yuav ua tau siv lub tshuab kaw lub cev ib leeg. Digital shutters tseem tuaj yeem tso cai rau kev txhim kho cov duab zoo vim tias nws tsis muaj qhov txav mus los uas ua rau muaj kev vibrations uas tuaj yeem ua rau pom duab yog siv ntev dhau.

Duab tau ua tiav thiab khaws cia

Tom qab cov duab tau txais los ntawm lub koob yees duab lub cev, nws yog ua tiav los ntawm on-board electronics los npaj rau kev ntes thiab khaws cia. Qhov no yuav koom nrog ntau yam haujlwm xws li demosaicing, txo suab nrov, kho xim thiab teeb tsa dynamic ntau qhov chaw. Cov duab yog ces muab cia rau hauv lub cim xeeb ntawm los yog nyob rau hauv lub koob yees duab video processor.

Tom ntej no, nyob ntawm seb hom koob yees duab siv (analog lossis digital), cov duab muab khaws cia ua ib qho zaj duab xis negatives lossis cov ntaub ntawv digital. Hauv cov koob yees duab analog, cov duab raug kaw raws li cov duab tsis zoo ntawm cov yeeb yaj kiab uas nyob hauv lub koob yees duab lub cev. Cov koob yees duab digital khaws cov duab ua cov ntaub ntawv digital xws li JPEGs lossis RAWs uas tuaj yeem xa mus rau khoos phis tawj thiab lwm yam khoom siv yam tsis tau ua.

Qee lub koob yees duab muaj cov yam ntxwv siab heev xws li phau ntawv hloov ntawm ISO rhiab heev (lub teeb rhiab heev), auto-focus tuition, manually exposure controls and even live view displays screens that enables you to instantly review photo composition and exposure settings before snapping the shutter button. Ntau lub koob yees duab digital niaj hnub no tseem siv cov khoom siv hauv Wi-Fi thev naus laus zis yog li cov duab tuaj yeem sib koom tau yooj yim hauv online los ntawm kev sib tham hauv social media.

xaus

Hauv kev xaus, cov koob yees duab yog ib qho cuab yeej zoo los ntes cov kev nco thiab qhia dab neeg. Lawv txoj kev siv thev naus laus zis tso cai rau peb khaws thiab khaws cov duab uas yuav tsis ua rau ploj mus rau lub sijhawm. Txawm hais tias koj yog tus kws yees duab tshaj lij lossis tsuas yog siv koj lub koob yees duab ua haujlwm nyiam, nkag siab tias koj lub koob yees duab ua haujlwm li cas yog qhov tseem ceeb ntawm kev thaij duab zoo nkauj. Siv sijhawm rau paub koj tus kheej nrog koj lub koob yees duab cov yam ntxwv thiab muaj peev xwm kom paub tseeb tias koj tau txais ntau tshaj ntawm nws.

Cov ntsiab lus ntawm lub koob yees duab cov khoom thiab lawv ua haujlwm ua ke li cas

Kev yees duab tau nyob ib puag ncig rau ntau pua xyoo, tab sis cov koob yees duab niaj hnub ua haujlwm hauv txoj hauv kev uas ua tsis tau kom txog thaum tsis ntev los no kev nce qib hauv thev naus laus zis. Ib qho tseem ceeb ntawm txhua lub koob yees duab digital yog ib qho Lens uas tsom lub teeb los ntawm qhov chaw mus rau ib qho duab sensor. Cov duab sensor yog qhov tseem ceeb ntawm ntau lab tus me me Diam duab ntes (pixels) uas hloov lub teeb rau hauv cov teeb liab hluav taws xob, kom cov duab tuaj yeem ntes thiab khaws cia ua cov ntaub ntawv. Thaum lub teeb liab raug kaw lawm, nws tuaj yeem ua tiav los ntawm lub koob yees duab processor los txhim kho xim thiab ua kom pom tseeb ua ntej nws tau khaws cia ua cov ntaub ntawv digital.

Feem ntau cov neeg siv koob yees duab niaj hnub no muaj ob peb lwm yam khoom uas txhim kho koj cov duab zoo thiab ua rau lawv zoo li lub neej. Cov no suav nrog:

• Autofocus mechanisms
• Electronic shutters
• Ntsuas ntsuas
• Dawb tshuav sensors
• Flash units
• Low-light rhiab heev li
• Duab stabilization systems
• Tso cov ntxaij vab tshaus rau saib ua ntej koj cov duab.

Tag nrho cov khoom tseem ceeb no ua haujlwm ua ke los tsim cov duab zoo raws li koj qhov chaw thiab nyiam thaum koj nias lub khawm kaw.

Cov txiaj ntsig ntawm kev siv lub koob yees duab

Thaum siv lub koob yees duab, muaj ntau yam txiaj ntsig suav nrog kev ntes lub sijhawm nco, ntes cov duab txav los qhia zaj dab neeg, tsim cov duab kos duab thiab ntau dua. Kev ntes cov duab nrog lub koob yees duab digital tuaj yeem khaws cia kev nco hauv txoj hauv kev uas cov koob yees duab yeeb yaj kiab tsis tuaj yeem ua tau. Tsiv cov duab xws li cov yeeb yaj kiab kuj tseem tuaj yeem ntes cov dab neeg, xwm txheej lossis xwm txheej hauv txoj hauv kev uas tseem cov duab yuav tsis tuaj yeem ua tau. Qhov no tuaj yeem siv rau kev hais dab neeg, lossis rau artistic qhia thiab creativity.

Cov yeeb yaj kiab kuj tso cai rau cov neeg tsim khoom sim nrog ntau lub kaum ntse ntse thiab txhaj tshuaj kom muab cov khoom kom tob dua thiab pom kev txaus siab. Tsis tas li ntawd, cov koob yees duab muab kev ywj pheej ntawm kev muaj tswv yim qhia los ntawm kev siv cov lo ntsiab muag sib txawv thiab cov yam ntxwv xws li raug teeb tsa thiab tswj kev tshuav dawb. Cov kws yees duab tshaj lij muaj ntau txoj hauv kev los tswj lawv cov duab xws li aperture tswj lossis time-lapse nqis uas pab kom lawv ntes cov ntsiab lus tshwj xeeb uas tsis tuaj yeem ua manually.

Thaum kawg, cov koob yees duab muab lub qhov hluav taws xob rau cov neeg ua yeeb yam qhia los ntawm kev sib xyaw thiab cov txheej txheem ntawm kev yees duab cov ntsiab lus txawm tias lawv yog portraits lossis toj roob hauv pes lossis lwm yam uas koj xaiv. Tag nrho cov txiaj ntsig no los ua ke tsim kev kos duab muaj peev xwm ua kom muaj kev xav thiab kev nco nyob mus ib txhis nrog cov koob yees duab digital.

Nyob zoo, Kuv yog Kim, niam thiab ib tus neeg nyiam nres nrog keeb kwm yav dhau los hauv kev tshaj tawm thiab kev txhim kho lub vev xaib. Kuv muaj kev mob siab rau kev kos duab thiab kev ua yeeb yam, thiab tam sim no kuv tab tom dhia taub hau ua ntej mus rau hauv lub ntiaj teb nres. Nrog rau kuv qhov blog, Kuv tabtom qhia kuv cov kev kawm nrog koj.