Zoom hauv lub koob yees duab yog dab tsi? Xaiv qhov zoom zoom

2024 Tus sau: Sierra Becker | [email protected]. Kawg hloov kho: 2024-02-26 05:15

Kev xaiv thiab yuav lub koob yees duab tsis yog ib qho yooj yim thiab lub luag haujlwm ua lag luam: tsis yog koj yuav tsum coj mus rau hauv tus account tag nrho cov kev xav tau thiab cov yam ntxwv ntawm cov cuab yeej, koj kuj yuav tsum nrhiav cov cuab yeej zoo li no hauv qeb tsim nyog.. Qhov yuam kev tseem ceeb tshaj plaws ntawm tus neeg yuav khoom yog unquestioning cia siab rau cov lus ntawm tus neeg pab tswv yim hauv pem teb. Raws li koj paub, lub luag haujlwm tseem ceeb ntawm cov thawj coj yog nce kev muag khoom. Rau kev tshaj tawm cov khoom lag luam zoo, cov neeg lag luam siv ntau yam kev dag ntxias, piv txwv li, lawv qhia qhov loj loj zoom tus nqi hauv cov lus piav qhia ntawm cov cuab yeej, thiab lawv tsis qhia qhov zoom (optical lossis digital), vam rau qhov tsis muaj peev xwm ntawm cov neeg yuav khoom. Txhawm rau zam txhua qhov no thiab xaiv cov cuab yeej zoo tshaj plaws, nws tsim nyog paub ua ntej txhua yam hais txog kev ua haujlwm zoom thiab hom zoom.

Zoom yog dab tsi?

Zoom (zoom) yog qhov tshwj xeeb ntawm lub koob yees duab lens uas tso cai rau koj hloov qhov zoom, yog li ua kom cov khoom nyob deb. Nrog nws, koj tuaj yeem tua cov hnub qub los ntawm qhov deb, zoom rau hauv thiab thaij duab txawm tias cov paj hauv lub qhov rais ntawm 9th pem teb, txawm tias kev sim cov cuab yeej ua tub rog thiab lub davhlau ntawm cov plhaub yam tsis muaj kev puas tsuaj rau lub hlwb thiab lub cev.

Zoom nyob ntawm tus nqi ntawm qhov ntev focal. FR yog qhov ntev ntawm ntulos ntawm nruab nrab ntawm lub lens mus rau lub matrix, i.e., tsom xam. Nws yog kev cai los cim nws ntawm lub lens hauv millimeters, piv txwv li, ib khub ntawm tus lej 5, 8-24 mm: thawj tus lej yog FR ntawm qhov kawg luv, thiab tus lej thib ob yog FR ntawm qhov kawg. Yog tias peb faib tus lej ntev FR los ntawm tus lej luv, peb tau txais tus nqi zoom ntawm plaub.

Digital zoom

Tam sim no peb paub tias qhov zoom yog dab tsi, nws tsim nyog nkag siab txog nws lub ntsiab ntau yam: digital thiab optical. Qee lub koob yees duab muab ob hom.

Digital zoom, thaum piv nrog kho qhov muag zoom, yog ib hom ntawv tseeb, vim tias los ntawm kev siv koj tsuas yog tau txais cov khoom lag luam digital xwb, thiab tsis yog cov khoom siv zoo tshaj plaws hauv daim duab. Scaling tshwm sim los ntawm kev ncab qhov kev pab cuam ntawm qhov nruab nrab ntawm daim duab kom txog thaum nws ncav cuag qhov loj ntawm tus ncej qub.

Yog tias qhov zoom piv digital loj, cov duab tuaj yeem nthuav dav nrog qhov tsis zoo; Twb tau ntim micro-slices tsis tuaj yeem txhim kho qhov zoo, yog li cov duab zoo li no hnyav pixelated thaum loj.

Txawm li cas los xij, nws tsis tuaj yeem hais meej meej tias kev siv digital zoom, koj tsuas tuaj yeem tau txais cov duab tsis zoo, vim tias cov txheej txheem ntawm kev ua cov digital tsis nyob twj ywm, tab sis txhim kho tas li. Piv rau cov khoom siv li 7 xyoo dhau los, cov kev pab cuam lub koob yees duab tam sim no muaj peev xwm ua kom cov duab loj, thiab qhov no ua tau zoo heev.lub stretch yuav luag imperceptible.

Yog tias qhov zoom no tsis ua raws li koj qhov yuav tsum tau ua, koj tuaj yeem kaw nws lossis hloov nws tus nqi hauv qhov chaw.

YOptical zoom

Zoom zoom yog qhov nce hauv daim duab los ntawm kev siv lub ntsej muag. Los ntawm kev txo qhov pom lub kaum ntse ntse, piv txwv li, qhov focal ntev, cov khoom hauv daim duab yog ze. Lub ntsiab kom zoo dua ntawm optical zoom tshaj digital zoom yog qhov tseeb tias thaum koj zoom nyob rau hauv, lub pixel nrug tsis txo qis, yog li cov duab zoo tsis deteriorate.

Qhov ntau ntawm focal lengths tuaj yeem pom ncaj qha ntawm lub lens. Lawm, thaum xaiv lub koob yees duab nrog optical zoom, tus nqi siab tshaj plaws yog qhov zoo dua, tshwj xeeb tshaj yog txij li kev lag luam tsis nyob twj ywm, cia "stamping" ntau thiab ntau cov khoom siv siab heev.

Superzooms - tus yeej ntawm kev zoom piv

Tam sim no, tsuas yog tus pog laus muaj hnub nyoog 80 xyoo tuaj yeem xav tsis thoob nrog qhov kho qhov muag 10x zoom. Kev vam meej yog nyob rau ntawm lub ntsej muag, thiab cov tiam tam sim no twb muaj kev ywj pheej txaus siab rau lub koob yees duab compact nruab nrog 50x zoom. Qhov no yog ntsuas tsis yog ib qho kev tawg, tab sis raws li tag nrho leap, ib tiam-ntev leap. Tseeb, dab tsi yog digital zoom piv rau optical superzoom? Compacts nrog xws li ib tug zoom nyob rau hauv cov nqe lus ntawm unsurpassed yees duab zoo twb tau tswj los mus sib tw nrog bulky teeb ntawm DSLRs thiab countless lo ntsiab muag uas kws kws yees duab luag rau tag nrho cov yees duab tua. Lawm, ntau qhov tshwj xeebCov superzoom compacts no tsis tuaj yeem hloov "tws thiab xuav" ntawm cov khoom siv yees duab ua haujlwm tau zoo, tab sis hais txog kev txav mus los thiab ergonomics lawv muab lawv lub taub hau pib.

Vim qhov tseeb tias cov compacts twb muaj lub zog zoom, lub lens ntawm lub koob yees duab zoo li no tsis tas yuav tsum tau muab tshem tawm tas li / muab tso rau hauv thiaj li nrhiav tau qhov haum tshaj plaws hauv ib qho kev yees duab tua, yog li qhov no tiv thaiv hmoov av los ntawm kev nkag mus rau hauv matrix.

Zoom tseem muaj nyob hauv cov koob yees duab yees duab. Qhov kev xaiv zoo tshaj plaws hauv qhov no yuav yog superzoom nrog phau ntawv zoom. Txawm hais tias lub koob yees duab zoom tsis yog qhov tshiab niaj hnub no, muaj cov haujlwm zoo li no hauv cov cuab yeej yog qhov tseem ceeb ntxiv.

Yog li, nws yog qhov zoo tshaj plaws los xaiv ib lub cuab yeej nrog qhov pom kev zoom lossis kev cog lus nrog superzoom. Koj twb paub tias digital zoom yog dab tsi thiab qhov zoo ntawm daim duab loj yog dab tsi. Zoom yuav tsum tsis yog qhov laj thawj tseem ceeb rau kev yuav khoom, nws yog qhov zoo dua los yuav lub koob yees duab zoo uas muab rau qhov muaj peev xwm hloov kho qhov muag. Nyob rau hauv cov ntaub ntawv no, yog hais tias lub siab xav los yog ceev xav tau ib tug high-power zoom kiag li overwhelms koj, koj yeej ib txwm yuav ib tug haum lens.