wide-angle kev ua si DV lub koob yees duab lens
wide-angle lens:
Noj 35mm ib lub lens reflex lub koob yees duab ua piv txwv, lub lens dav feem ntau yog hais txog lub lens nrog lub focal ntev li ntawm 17 txog 35mm.
Lub ntsiab feature ntawm lub lens wide-angle yog tias lub lens muaj lub kaum sab xis loj ntawm kev pom thiab pom qhov dav dav.Qhov ntau ntawm scenery pom los ntawm ib qho kev pom muaj ntau dua qhov pom los ntawm tib neeg lub qhov muag ntawm tib qhov kev pom;Qhov tob ntawm qhov xwm txheej yog qhov ntev, uas tuaj yeem pom qhov pom meej meej;Nws tuaj yeem hais txog qhov pom ntawm daim duab, ua tau zoo ntawm exaggerating lub zeem muag thiab nthuav qhia qhov kev nkag siab ntawm qhov deb thiab qhov sib thooj ntawm qhov chaw, uas yog qhov zoo rau kev txhim kho qhov kev thov ntawm daim duab.
Cov yam ntxwv tseem ceeb ntawm lub lens wide-angle:
1. Lub kaum sab xis pom dav, uas tuaj yeem npog ntau qhov kev pom.Lub npe loj saib lub kaum sab xis txhais tau hais tias tib qhov chaw saib (qhov kev ncua deb ntawm cov ntsiab lus tseem tsis hloov pauv) yog txhaj nrog peb qhov sib txawv focal lengths ntawm wide-angle, standard thiab telephoto.Raws li qhov tshwm sim, tus qub coj ntau scenes nce, nqis, sab laug thiab sab xis dua li yav tas los.Thaum tus kws yees duab tsis muaj txoj hauv kev tawm, yog tias nws nyuaj rau ua tiav daim duab ntawm qhov chaw nrog 50mm tus qauv lens (xws li cov duab sib sau ua ke ntawm cov cim, thiab lwm yam), nws tuaj yeem yooj yim daws qhov teeb meem los ntawm kev siv cov yam ntxwv ntawm qhov dav- lub kaum sab xis lens nrog ntau yam kev pom lub kaum ntse ntse.Tsis tas li ntawd, piv txwv li, tua cov teb loj lossis cov tsev siab hauv nroog tsuas yog ntes ib feem ntawm qhov xwm txheej nrog lub lens txheem, uas tsis tuaj yeem qhia qhov dav lossis qhov siab ntawm qhov chaw.Kev tua nrog lub kaum sab xis dav tuaj yeem ua tau zoo qhia qhov qhib lub sijhawm ntawm qhov xwm txheej loj lossis lub koob meej ntawm cov tuam tsev uas nyob rau hauv huab.
2. luv focal ntev thiab ntev scene qhov tob.Thaum tua cov scenes dav, cov kws yees duab feem ntau vam khom rau cov yam ntxwv ntawm luv focal ntev ntawm lub kaum sab xis dav thiab qhov tob ntawm qhov xwm txheej kom coj tag nrho cov xwm txheej los ntawm ze rau deb mus rau qhov kev ua tau zoo meej.Tsis tas li ntawd, thaum tua nrog lub kaum sab xis dav, yog tias siv lub aperture me me tib lub sijhawm, qhov tob ntawm qhov chaw ntawm qhov chaw yuav ntev dua.Piv txwv li, thaum tus kws yees duab siv 28mm wide-angle lens los tua, qhov tsom xam yog nyob rau hauv cov ntsiab lus hais txog 3M, thiab lub aperture yog teem rau F8, ces yuav luag tag nrho cov ntawm lawv nkag mus rau hauv qhov tob ntawm teb los ntawm 1m mus rau infinity.Nws yog precisely vim hais tias ntawm cov yam ntxwv ntawm qhov ntev qhov tob ntawm daim teb uas wide-angle lens yog feem ntau siv los ntawm cov kws yees duab raws li ib tug ceev txhaj koob tshuaj tivthaiv lens nrog muaj zog mus.Qee zaum, cov kws yees duab tuaj yeem ua tiav kev ntes sai heev yam tsis tau tsom mus rau qhov kev kawm.
3. Muaj peev xwm hais txog lub zeem muag thiab hais txog qhov sib piv ntawm qhov deb thiab ze.Qhov no yog lwm qhov kev ua haujlwm tseem ceeb ntawm lub lens dav.Lub npe hu ua qhov tseem ceeb ntawm lub hauv ntej thiab hais txog qhov sib txawv ntawm qhov deb thiab nyob ze txhais tau hais tias lub lens dav tuaj yeem hais txog qhov sib txawv ntawm qhov ze, deb thiab me dua li lwm lub lo ntsiab muag.Hauv lwm lo lus, cov duab thaij nrog lub lens dav dav muaj cov khoom loj nyob ze thiab cov khoom me me nyob deb, uas ua rau tib neeg xav tias lawv tau qhib qhov kev ncua deb thiab ua rau muaj kev xav zoo nyob rau hauv qhov tob.Tshwj xeeb tshaj yog thaum tua nrog ultra wide-angle lens nrog luv focal ntev, cov nyhuv ntawm ze rau qhov loj me me yog qhov tseem ceeb.
4. Nws tuaj yeem ua rau exaggerated thiab deformed.Feem ntau hais lus, cov ntsiab lus yog exaggerated thiab deformed, uas yog ib qho kev txwv loj hauv kev siv lub lens dav.Nyob rau hauv qhov tseeb, nws tsis yog tas undesirable rau qhov kev kawm kom zoo exaggerated thiab deformed.Cov kws yees duab paub txog feem ntau siv lub kaum sab xis dav kom hloov pauv cov ntsiab lus thiab thaij duab txawv ntawm qee qhov tsis tseem ceeb uas tib neeg tig qhov muag tsis pom.Ntawm chav kawm, qhov kev nthuav qhia ntawm exaggeration thiab deformation nrog wide-angle lens yuav tsum tau raws li cov kev xav tau ntawm lub ntsiab, thiab tsawg thiab zoo.Txawm hais tias cov ntsiab lus xav tau lossis tsis xav tau, nws tsis txaus los tsim kev tsim txom thiab deformation ntawm lub kaum sab xis dav thiab qhov muag tsis pom qhov txawv txav hauv daim ntawv.
Peb tuaj yeem ua OEM, ODM rau koj, yog tias koj xav tau, thov hu rau peb, ua tsaug.
