Lub lens tsom kwm ruaj khov yog dab tsi?

Raws li lub npe qhia, ib qholub lens tsom ntsoovyog ib hom lens thaij duab nrog qhov ntev focal ruaj khov, uas tsis tuaj yeem hloov kho thiab sib xws nrog lub lens zoom.

Piv rau lwm yam, cov iav tsom iav feem ntau muaj qhov qhib loj dua thiab zoo dua qhov muag pom, ua rau lawv tsim nyog rau kev thaij duab zoo.

Qhov sib txawv ntawm cov iav tsom kwm ruaj khov thiab cov iav zoom

Lub lens tsom teeb thiab lub lens zoom yog ob hom lens koob yees duab uas siv ntau, thiab lawv qhov sib txawv tseem ceeb yog seb qhov ntev ntawm lub lens puas hloov tau. Lawv muaj lawv tus kheej qhov zoo thaum siv rau hauv ntau qhov xwm txheej sib txawv.

Piv txwv li, lub lens tsom teeb tsa ruaj khov yog qhov tsim nyog rau kev siv hauv cov xwm txheej uas muaj teeb pom kev zoo txaus, nrhiav cov duab zoo, thiab cov ntsiab lus thaij duab ruaj khov, thaum lub lens zoom yog qhov tsim nyog dua rau cov xwm txheej uas xav tau kev zoom yooj ywm, xws li kev thaij duab kis las.

Lub lens tsom xam ruaj khov

Qhov ntev ntawm qhov muag

Qhov ntev ntawm lub lens tsom kwm yog qhov ruaj khov, xws li 50mm, 85mm, thiab lwm yam, thiab tsis tuaj yeem hloov kho. Lub lens zoom tuaj yeem hloov kho qhov ntev ntawm lub lens los ntawm kev tig lossis thawb thiab rub lub lens barrel, ua rau muaj kev xaiv ywj pheej ntawm lub kaum sab xis dav thiab telephoto.

Okev ua tau zoo ntawm lub teeb

Feem ntau, iblub lens tsom ntsoovmuaj qhov zoo ntawm qhov muag zoo dua li lub lens zoom vim nws tsim yooj yim dua thiab tsis tas yuav xav txog kev txav ntawm lub lens lossis cov qauv kho qhov muag nyuaj. Hais txog qhov sib piv, cov lens tsom teeb feem ntau muaj qhov qhib siab dua (nrog tus nqi F me dua), uas tuaj yeem muab cov duab zoo dua, lub teeb ci ntau dua, thiab cov teebmeem zoo dua rau keeb kwm yav dhau los.

Tab sis tam sim no nrog kev txhim kho thev naus laus zis, qee lub lens zoom siab kuj tseem tuaj yeem ncav cuag qib ntawm cov lens tsom kwm ruaj khov hauv kev ua haujlwm kho qhov muag.

Qhov hnyav thiab ntim

Cov qauv ntawm lub lens tsom teeb yog qhov yooj yim, feem ntau me dua thiab sib dua. Cov qauv ntawm lub lens zoom yog qhov nyuaj heev, muaj ntau lub lens, yog li nws feem ntau hnyav dua thiab loj dua, uas tej zaum yuav tsis yooj yim rau cov kws thaij duab siv.

Txoj kev tua phom

Lub lens tsom kwm ruaj khovs yog qhov tsim nyog rau kev tua cov xwm txheej lossis cov ntsiab lus tshwj xeeb, vim tias qhov ntev ntawm lub focal tsis tuaj yeem hloov kho, thiab cov lens tsim nyog yuav tsum tau xaiv raws li qhov deb ntawm kev tua.

Lub lens zoom no yooj ywm heev thiab tuaj yeem kho qhov ntev ntawm lub lens raws li qhov xav tau ntawm kev thaij duab yam tsis tas hloov qhov chaw thaij duab. Nws haum rau cov xwm txheej uas xav tau kev hloov pauv ntawm qhov deb thiab lub kaum sab xis ntawm kev thaij duab.