Zoom Lens: Nws Yog Dab Tsi Thiab Thaum Yuav Siv Nws

by kim Kho tshiab: Lub rau hli ntuj 28, 2022

zoom lo ntsiab muag yog ib qho ntawm ntau yam khoom siv yees duab, muab tus kws yees duab ntau yam nta thiab kev xaiv.

Lub lens zoom tuaj yeem pab tsim cov duab zoo nkauj nrog cov teebmeem bokeh zoo nkauj, lossis ntes cov ntsiab lus nyob deb nrog qhov tseeb thiab meej.

Hauv tsab xov xwm no, peb yuav ua tib zoo saib seb lub lens zoom yog dab tsi, nws tuaj yeem ua li cas, thiab thaum twg siv nws rau koj cov phiaj xwm kev yees duab.

Definition of Zoom Lens

Hauv kev yees duab, lub koob yees duab zoom yog hom lens nrog qhov sib txawv focal ntev. Lub peev xwm los hloov lub focal ntev yog hu ua zooming. Nrog lub lens zoom, cov kws yees duab tuaj yeem hloov kho lawv qhov kev pom sai thiab yooj yim rau cov ntsiab lus raug ntes los ntawm kev kho qhov focal ntev.

Zoom lo ntsiab muag siv cov lo ntsiab muag sab hauv tsim los txav hauv kev sib raug zoo rau ib leeg kom ua tiav qhov sib txawv ntawm cov duab ntawm qhov sib txawv ntawm qhov khoom. Txhua hom zoom lens raug txheeb xyuas los ntawm nws qhov ntau - piv txwv li, 18-55 mm lossis 70–200 mm - uas qhia txog qhov luv thiab ntev tshaj plaws focal lengths uas lub lens tuaj yeem teeb tsa. Feem ntau qhov deb deb koj nyob ntawm koj qhov kev kawm (xws li taug kev rov qab), koj daim duab yuav loj dua; conversely, thaum koj nyob ze, nws yuav me me (piv txwv li, taug kev rau pem hauv ntej).

Feem ntau zoom muaj ntau yam ntawm 35mm lo ntsiab muag. Qhov no txhais tau hais tias lawv muab cov tswv yim yooj yooj yim vim tias lawv tsim nyog rau ntau qhov kev sib tw tua thiab ua kom lawv muaj ntau yam tshaj li cov ntsiab lus tseem ceeb, uas muaj qhov ntev ntev uas tsis tuaj yeem hloov kho yam tsis hloov lub lo ntsiab muag lossis txuas cov khoom siv sab nraud xws li teleconverters. Zooms kuj feem ntau muab kev ua kom zoo dua qub dua qub.

Hom Zoom Lenses

Zoom lo ntsiab muag tuaj nyob rau hauv ntau daim duab thiab qhov ntau thiab tsawg thiab raug txheeb xyuas los ntawm lawv qhov ntev focal ntev - los ntawm luv mus rau ntev. Tus lej qis dua, qhov dav ntawm lub kaum sab xis pom; tus lej siab dua, qhov nqaim dua. Zoom lo ntsiab muag tuaj yeem muab faib ua peb pawg sib txawv: lub kaum sab xis zoom, zoom qauv, thiab telephoto zooms.

Wide-angle zoom lo ntsiab muag muab lub kaum sab xis ntawm qhov pom uas dav dua li qhov koj tuaj yeem tau txais nrog lub lens focal ntev ruaj khov lossis cov qauv zoom lens. Cov no yog qhov kev xaiv zoo tshaj yog tias koj xav ntes cov panoramas dav lossis haum rau sab nraum zoov loj rau hauv koj qhov kev txhaj tshuaj vim tias lawv nthuav tawm cov ntsiab lus nyob deb txo qhov kev xav tsis meej thiab ua rau koj ntes txhua yam uas nyob hauv koj lub thav duab.

Standard zoom lo ntsiab muag muaj ib tug nruab nrab focal ntev ntau yam uas mus los ntawm 24 mus rau 70mm ntawm feem ntau qauv. Lawv muab tau yooj yim dua li qhov ntev focal ntev lo ntsiab muag ua tsaug rau lawv lub peev xwm los kho sai sai los ntawm qhov nruab nrab-dav txhaj tshuaj mus rau ze-ups. Cov hom zoom no yog qhov zoo tagnrho rau kev siv ntau yam xws li kev yees duab mus ncig, ua haujlwm sau cia, cov xwm txheej sab hauv tsev, ntes cov duab xws li duab lossis duab txhua hnub.

Telephoto zoom lo ntsiab muag muaj qhov ntev focal ntev pib ntawm thaj tsam 70mm lossis ntev dua thiab txuas mus txog li ob peb puas millimeters (lossis siab dua). Cov hom lo ntsiab muag no ua tau zoo ntawm kev ua kom deb li deb tau tshwm sim ze thaum tua toj roob hauv pes, kev yees duab tsiaj qus thiab kev ua kis las yam tsis xav tau ntau cov iav xws li tripods thiab monopods vim lawv cov khoom siv kho qhov muag muaj zog uas txo cov koob yees duab co.

cov kev pab cuam

Zoom lo ntsiab muag muaj ntau yam rau cov kws yees duab, vim tias lawv muaj lub kaum ntse ntse pom thiab muaj peev xwm zoom hauv thiab khaws cov ntsiab lus ntxiv. Zoom lo ntsiab muag yog qhov zoo rau kev ntes cov toj roob hauv pes thiab tseem rau kev yees duab tsiaj qus uas yuav tsum tau zoom rau kom pom tseeb dua los ntawm qhov deb. Tseem muaj lwm yam zoom rau cov lo ntsiab muag uas peb yuav tam sim no saib.

versatility

Zoom lo ntsiab muag muaj ntau yam ntxiv rau cov kws yees duab ntawm txhua yam, txawm tias lawv yog cov kws tshaj lij lossis tsuas yog tau txais kev nplij siab nrog cov cuab yeej siv siab dua. Qhov no yog vim qhov zoom lo ntsiab muag tuaj yeem hloov qhov ntev ntawm lub lens - cia koj xaiv lub kaum sab xis dav, lossis telephoto nyob ntawm seb qhov twg haum rau qhov xwm txheej. Qhov kev muaj peev xwm hloov pauv ntawm ntau qhov sib haum xeeb ntev ua rau lawv zoo rau ob tus neeg pib tshiab, leej twg tuaj yeem kawm paub yuav ua li cas sau lawv cov kev txhaj tshuaj, thiab cov kws tshaj lij nrhiav los tsim cov duab zoo nkauj.

Zoom lo ntsiab muag kuj qhib lub sijhawm rau kev muaj tswv yim - tshwj xeeb nrog kev yees duab portrait. Tsis tsuas yog lawv tuaj yeem ntes qhov ze-up thiab nruj txhaj tshuaj uas yuav nyuaj yog tias koj siv lub lens tseem ceeb (tso focal ntev lens), tab sis koj tuaj yeem hloov pauv ntawm ntau qhov dav thiab kev pom thaum tua. Thiab vim hais tias ntau yam ntawm cov lo ntsiab muag no tau nruab nrog cov duab stabilization nta, koj yuav muaj lub sijhawm yooj yim dua kom tau txais cov duab ntse hauv cov teeb pom kev tsis zoo yam tsis tas yuav cia siab rau qhov ntev shutter speeds lossis ceev ceev zaj duab xis.

Cov yam ntxwv no ua ke ua kom zoom lo ntsiab muag xav tau rau ntau hom xwm txheej - los ntawm kev yees duab toj roob hauv pes uas nws yuav muaj txiaj ntsig zoo los ua kom zoom rau hauv thaj chaw sib cais kom saib ze dua yam tsis tas yuav ncua koj tus kheej lub cev; Kev yees duab kev ua kis las uas cov ntsiab lus yuav txav tau sai thiab xav tau qhov tseeb pinpoint; Cov tsiaj qus yees duab los ntawm qhov chaw nyab xeeb; macro photography qhov chaw nqaim aperture zoo tagnrho; ntxiv ntau ntxiv! Thaum kawg zoom lo ntsiab muag muab qhov yooj yim uas cov lo ntsiab muag tseem ceeb tsuas tsis tuaj yeem muab - yog li kev qhib siab rau cov kev xaiv sib txawv tsuas yog ua rau koj cov txuj ci teeb tsa hauv cov lus qhia tshiab!

Duab Zoo

Thaum siv lub lens zoom, cov duab zoo tau txais ncaj qha rau cov yam ntxwv ntawm lub lens tshwj xeeb siv. Ntawm tus nqi qis dua, feem ntau zoom lo ntsiab muag tsis xa cov duab zoo li lub lens tseem ceeb - uas muaj cov ntsiab lus sab hauv feem ntau uas ua rau cov duab sharpness. Txawm li cas los xij, niaj hnub no kev nce qib hauv kev tsim lub lens tau tawg los ntawm cov teeb meem no thiab muaj ntau txoj hauv kev rau kev zoom lo ntsiab muag nrog cov kev daws teeb meem zoo thiab qhov sib txawv ntawm ntau qhov focal lengths.

Zoom lo ntsiab muag tseem tuaj yeem muab kev hloov pauv ntau thaum nws los txog rau cov xwm txheej thiab kev xav, muab cov kws yees duab muaj tswv yim tswj hwm lawv cov duab. Los ntawm kev hloov lub focal ntev, lawv tuaj yeem hloov kho lawv qhov chaw saib tau yooj yim thaum khaws lub koob yees duab ntawm qhov chaw ruaj khov txheeb ze rau lawv qhov kev kawm. Qhov no tuaj yeem pab tau tshwj xeeb tshaj yog thaum tua nyob rau hauv qhov chaw nruj lossis ib puag ncig uas txwv tsis pub tus kws yees duab lub peev xwm los sau lawv cov kev txhaj tshuaj txaus nrog lwm hom lens. Lwm qhov txiaj ntsig tseem ceeb ntawm no yog tias koj tsis tas yuav mus ncig ntawm ntau lub ntsiab lus tseem ceeb yog tias koj tsis xav tau - hloov koj tuaj yeem siv tsuas yog ib qho zoom zoom lens uas npog tag nrho koj cov focal ntev nrog kev daws teeb meem zoo thiab qhov sib txawv.

Tus nqi-Ua tau zoo

Lub lens zoom tuaj yeem yog qhov txiaj ntsig zoo los tso koj lub DSLR los ntawm nws cov paces. Zoom lo ntsiab muag tsis tshua kim dua li cov lo ntsiab muag tseem ceeb, uas muaj qhov ntev focal ntev. Zoom lo ntsiab muag kuj sib dua thiab sib zog dua, uas yuav pab tau rau kev mus ncig thiab toj roob hauv pes, nrog rau txoj kev lossis kev thaij duab thaij duab. Tsis tas li ntawd, muaj peev xwm sib txawv ntawm qhov focal ntev los ntawm lub kaum sab xis mus rau telephoto txhais tau tias koj tsis xav tau ob peb lub ntsiab lus tseem ceeb nrog qhov sib txawv focal ntev los npog tag nrho koj cov kev xav tau - txuag nyiaj ntawm iav.

Thaum kawg, yog tias koj yuav lub lens zoom nrog cov duab stabilization (IS) built-in, koj yuav tuaj yeem ntes cov duab nkig txawm tias thaum tuav ntawm qhov nrawm uas yuav tsis muaj peev xwm ua tau yam tsis muaj IS. Qhov no yuav tso cai rau koj mus tua yam tsis muaj lub log nyob ib puag ncig lub koob yees duab lossis lwm lub mounts rau kev ruaj ntseg ntxiv ua rau nws raug nqi ntxiv raws li lub sijhawm thiab lub zog siv rau kev teeb tsa thiab kev tawg ntawm cov khoom siv.

Thaum Yuav Siv Lub Zoom Lens

Ua qhov kev xaiv zoo ntawm lub lens thaum tua tuaj yeem ua rau muaj txiaj ntsig zoo ntawm koj cov duab thiab cov yeeb yaj kiab. Thaum xaiv lub lens, nws yog ib qho tseem ceeb kom paub thaum twg yuav siv lub lens zoom thiab thaum twg mus rau lub lens focal ntev. Zoom lo ntsiab muag tuaj yeem ua tau zoo kawg nkaus rau ntau qhov sib txawv ntawm cov xwm txheej sib txawv. Cia peb saib thaum twg koj yuav tsum tau siv lub lens zoom thiab nws tuaj yeem muaj txiaj ntsig zoo rau koj kev yees duab.

Toj roob hauv pes Photography

Thaum nws los txog rau kev siv Zoom Lens rau cov duab toj roob hauv pes, koj yuav tsum paub tias feem ntau zoom lo ntsiab muag yuav tsis tuav ntau npaum li qhov ntse ntawm lawv qhov ntev focal lengths thaum piv rau prime lo ntsiab muag. Txawm li cas los xij, nrog qhov hais tias, ob peb yam ua ke nrog kev tuaj yeem kho tau yooj yim koj cov ntsiab lus tsis tas yuav taug kev lossis hloov txoj haujlwm ntawm koj lub koob yees duab tseem tuaj yeem tsim nyog rau kev nqis peev hauv lub lens zoom.

Lub kaum sab xis dav (14 - 24mm) yog qhov zoo tagnrho rau kev ntes cov toj roob hauv pes nthuav dav thiab cov xwm txheej loj, thaum 24 - 70mm lossis 24 - 105mm feem ntau zoo li yog qhov xav tau ntau yam thaum tab tom nrhiav rau lub hom phiaj txhua yam. Rau ntau qhov chaw tshwj xeeb, xws li cov toj roob hauv pes, cov tsiaj qus hauv thaj chaw / cov tsiaj qus tshwj xeeb thiab kev yees duab astro, 70 - 300mm thiab saum toj no yog ntau yam ntxiv rau kev thaij duab dav nrog telephoto ncav cuag hauv tib lub thav duab.

Txawm hais tias hom duab toj roob hauv pes nyiam tshaj plaws rau koj, yuav muaj qhov zoom lens uas yuav pab khaws cov duab zoo nkauj. Qhov tseem ceeb yog xaiv ib qho uas haum rau koj cov peev nyiaj thiab cov kev xav tau muaj tswv yim.

Duab Portrait

Kev yees duab Portrait feem ntau ua tiav zoom siv lub lens zoom. Zooming muaj peev xwm nyob rau hauv koj lub lens tso cai rau koj los tsim stunning dluab ntawm cov neeg tsis tas yuav tsiv mus nyob thiab reposition lawv nyob rau hauv thiaj li yuav tau txais txoj cai framing thiab muaj pes tsawg leeg. Hloov pauv, yog tias koj tuaj yeem siv lub lens tseem ceeb, nws yuav muab rau koj nrog qhov sib txawv vim nws muaj qhov nqaim ntawm qhov pom - hauv lwm lo lus koj tuaj yeem pom los ntawm qhov pom tau txwv yog li koj tsis muaj chav wiggle tsawg thaum sau koj cov duab. duab. Raws li xws li, ntau tus kws yees duab portrait xaiv rau telephoto lossis nruab nrab telephoto lo ntsiab muag rau lawv cov duab portraits vim tias qhov yooj yim ntxiv ntawm kev muaj peev xwm zoom hauv thiab tawm nyob ntawm qhov xav tau ntawm lawv cov kev kawm (los yog hom kev muaj tswv yim zoo li cas lawv xav ua tiav. ). Telephoto lo ntsiab muag feem ntau yog siv rau kev yees duab kev ua si thiab vim lawv muaj peev xwm ntes cov khoom nyob deb ze ze. Kev ncav cuag ntev kuj tseem muab cov kws yees duab xaiv ntau dua thaum thaij nrog lub teeb ntuj, vim tias lawv tuaj yeem nce lossis txo qhov kev ncua deb ntawm lawv tus kheej thiab lawv cov ntsiab lus thaum tseem khaws cov khoom hauv lub thav duab.

Sports thiab Wildlife Photography

Kev ua kis las thiab kev yees duab tsiaj qus feem ntau xav tau kev kaw nrawm nrawm thiab yuav xav tau kev yees duab ib qho kev txav mus los ntawm qhov deb. Nyob rau hauv cov xwm txheej zoo li no, lub telephoto lossis zoom lens tuaj yeem pab ua kom tiav qhov kev txhaj tshuaj xav tau. Telephoto lo ntsiab muag tuaj ntau qhov ntau thiab tsawg, nrog 70mm yog qhov chaw zoo pib yog tias koj nyuam qhuav pib.

Cov lo ntsiab muag no tso cai rau koj kom zoom rau hauv koj cov ntsiab lus thaum tseem muab koj chav rau thaub qab raws li xav tau. Kev nrawm nrawm nrawm pab nres qhov kev txiav txim thiab ua kom txhua yam ntse, yog li muaj lub lens ceev yog qhov tseem ceeb rau kev ua kis las thiab kev yees duab tsiaj qus. Qhov ceev ntawm qhov aperture thiab focal ntau ntawm lub lens, qhov ntau yam koj yuav muaj nyob rau hauv koj cov kev txhaj tshuaj.

Telephoto lo ntsiab muag yog tshwj xeeb tshaj yog haum rau kev ua ub no uas tsis muaj kev txav mus los thiab kev ua kis las uas koom nrog thaj chaw qhib loj xws li taug qab-thiab-tsav cov xwm txheej thiab kev sib tw pib. Cov kis las uas cov neeg ua si sib cais los ntawm kev sib txawv loj xws li golf, caij nkoj lossis caij nthwv dej kuj tuaj yeem ntes tau yooj yim siv lub lens telephoto, vim tias nws ntes cov ntsiab lus nyob deb tshaj li lwm hom lo ntsiab muag tuaj yeem ncav cuag.

Yog li, yog tias koj txaus siab rau kev tua tsiaj qus lossis kev ua kis las yees duab tsis tu ncua, kev nqis peev hauv 70-300mm telephoto lens zoo yuav luag yuav muab rau koj zoo rov qab los ntawm cov duab txhim kho. Lub peev xwm zoom tso cai rau koj kom yooj yim khaws cov ntsiab lus zoo kawg nkaus uas cov ntsiab lus tseem ceeb no muab thaum tso cai rau kev pom ze dua tsis tuaj yeem ua tiav nrog "cov khoom siv" lo ntsiab muag xws li 18-55mm zooms uas feem ntau tuaj nrog cov SLRs thaum yuav khoom tshiab.

xaus

Hauv kev xaus, zoom lo ntsiab muag muab cov kws yees duab nrog ntau yam thiab hloov tau yooj yim muaj tswv yim cuab yeej. Lawv tso cai rau koj mus sai sai ntawm lub kaum sab xis mus rau lub telephoto saib yam tsis tas yuav hloov lo ntsiab muag. Paub thaum twg siv lub lens zoom tuaj yeem pab koj tau txais txiaj ntsig zoo tshaj plaws ntawm koj cov duab. Yog li, txawm tias koj tab tom thaij duab toj roob hauv pes, portraits, thaij duab mus ncig, lossis lwm yam, lub lens zoom tuaj yeem yog qhov kev xaiv zoo.

Ntsiab lus

Hauv cov ntsiab lus, lub lens zoom yog hom lub koob yees duab lens uas tso cai rau koj tsom mus rau cov khoom ntawm qhov sib txawv. Nws muaj peev xwm "zoom hauv" thiab "zoom tawm" los hloov qhov chaw pom hauv cov duab raws li xav tau. Zoom lo ntsiab muag muaj ntau yam zoo kawg li, ua rau lawv zoo tagnrho rau ntau hom kev yees duab xws li toj roob hauv pes, duab, duab ua si, yees duab tsiaj qus, thiab lwm yam.

Thaum txiav txim siab seb lub lens zoom ntxiv rau koj cov khoom sau, nws yog ib qho tseem ceeb uas yuav tau xav txog yam xws li focal ntev ntau yam (wide-angle lossis telephoto), qhov siab tshaj plaws aperture loj, kev tsim kho zoo (hlau vs yas), qhov hnyav thiab qhov loj ntawm lub lens. Txawm hais tias koj xaiv lub zoom lens twg, nco ntsoov tias nws yuav muab koj qhov kev ua tau zoo tshaj plaws rau koj cov kev xav tau tshwj xeeb.

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.