Wide-angle lo ntsiab muag - yam ntxwv thiab cov lus qhia

2024 Tus sau: Sierra Becker | [email protected]. Kawg hloov kho: 2024-02-26 05:10

Kab lus no yuav tham txog yuav ua li cas siv lub lens dav dav. Qee qhov tshwj xeeb ntawm lawv txoj haujlwm kuj suav nrog. Feem ntau, lub kaum sab xis dav siv rau cov laj thawj hauv qab no:

1. Thaum koj xav nthuav cov toj roob hauv pes nrog qhov chaw loj, piv txwv li, tua lub nroog saib.
2. Thaum xav tau tus kws yees duab tsis txhob hnov qab thaum tua ntawm txoj kev.

Canon's wide-angle lo ntsiab muag muaj kab pheeb ces kaum ntawm qhov pom ntawm 100 degrees thiab qhov dav ntawm 88 (ntawm ib txwm 35mm ncej).

Lub kaum ntse ntse ua haujlwm li cas? Lawv Cov Nta

- Lawv muaj qhov chaw loj. Yog li ntawd, cov khoom uas tau piav qhia hauv daim duab raug txo los ntawm ib nrab. Qhov no yog qhov sib txawv ntawm kev tua los ntawm ib lub lens txheem ib txwm. Txhawm rau muab nws yooj yim, lub kaum sab xis yuav tsum tsis txhob siv rau kev tua roob toj roob hauv pes, vim nws me heev.

Koj tuaj yeem daws qhov teeb meem no. Koj yuav tsum ntxiv qee yam khoom loj rau tus ncej uas protrude nyob rau hauv lub foreground. Cov no tuaj yeem yog:

npawg ntawm txoj kev.

YogCov nyhuv ntawm qhov chaw nquag yuav raug tsim, uas cov neeg saib tuaj yeem ntes qhov muag.

- Thaum siv lub ntsej muag dav dav, qhov muag tsis pom kev yuav tshwm sim hauv cov duab. Cov no yog cov pob txha zoo li tus curvatures (distortions). Lawv tshwm sim nyob rau hauv periphery ntawm tus ncej. Tab sis koj yuav tsum tsis txhob sib cav hais tias qhov zoo ntawm daim duab yog degraded vim cov nyhuv no. Qee lub sij hawm qhov tsis sib xws tshwm sim. Cov muaj pes tsawg leeg nyob rau hauv daim duab zoo li yooj yim dua nrog kev pab los ntawm chim-puab distortions. Yog tias koj tsis xav tawm tsam qhov chaw, tom qab ntawd ua tib zoo saib kom paub tseeb tias tsis muaj cov ntoo lossis cov ces kaum tsev ntawm cov npoo. Lawv muaj zog khoov. Lub koob yees duab yuav tsum tuav raws nraim kab rov tav, vim hais tias yuav muaj blockages ntawm ntsug.

- Lub ntsej muag dav dav tau nce "glare". Yog li ntawd, koj yuav tsum tau saib xyuas qhov chaw ntawm lub hnub thaum tua nyob rau hnub tshav ntuj. Siv lub hood yog tias ua tau. Yog tias koj cov cuab yeej tseem tsis tau muaj, ces qhov teeb meem me me tos koj. Vim yog qhov loj ntawm lub kaum sab xis dav (77 hli lossis ntau dua), nws yog qhov nyuaj kom phim lub lens hood thiab lim. Yog koj pom lawv, lawv yuav raug nqi rau koj.

- Lub kaum sab xis dav rau Canon, ua ke nrog lub ntsej muag luv luv, muaj qhov tshwj xeeb ntawm kev siv lub tshuab lim polarizing. Txij li thaum lub ntuj tsis sib xws polarized ntawm lub kaum sab xis dav, qhov chaw xiav tsaus yuav tshwm rau ntawm nws. Yog tias koj xav tua kab rov tav toj roob hauv pes nrog lub ntuj, ces lub kaum sab xis dav tsis pom zoo siv nrog lub polarizer. Yog tias koj tseem xav sim, ces koj yuav tsum xaiv raupolarizing lim nrog lub nplhaib nqaim bandage. Lawv tau tsim tshwj xeeb rau lub kaum sab xis dav thiab tsis tso cai rau blackout nkag mus rau lub ces kaum ntawm tus ncej.

- Nrog rau cov duab zoo li no, siv lub teeb tsa hauv tib lub sijhawm raws li qhov kev xaiv pov tseg luv luv tsis ua haujlwm. Lub teeb tsis muaj zog yuav tsis tuaj yeem teeb pom kev loj ntawm qhov chaw thiab yuav nyob ze rau ntawm lub lens nrog lub taub loj. Yog li ntawd, yuav muaj qhov tsaus ntuj nyob rau hauv cov duab ntawm lub semicircle nyob rau hauv cov duab. Nws yuav tig tawm vim qhov tseeb tias lub lens yuav nrum duab ntxoov ntxoo los ntawm lub teeb. Nws nkag mus rau hauv tus ncej hauv qab no.

Tau kawg, tsis yog lub kaum sab xis dav dav nrum duab ntxoov ntxoo, tab sis lwm hom thiab. Muaj tseeb, vim yog lub kaum sab xis me me, nws tsis poob rau hauv tus ncej.

Txoj kev tawm ntawm cov teeb meem no yog txhawm rau nce lub focal ntev lossis siv cov koob yees duab tawm ntawm lub ntsej muag tawm.