Dav-angle lo ntsiab muag - cov yam ntxwv thiab kev qhia

Nyob rau hauv no tsab xov xwm peb yuav kub siab rau yuav ua li cas kom zoo zoo siv ib tug ntau-angle lo ntsiab muag. Nws kuj tham txog ib co ntawm cov yam ntxwv ntawm lawv ua hauj lwm. Heev feem ntau dav-angle lo ntsiab muag yog siv rau cov nram qab no:

1. Thaum lub scenery kuv xav mus nthuav ib qhov chaw loj, xws li noj saib ntawm lub nroog.
2. Thaum tus kws yees duab, nws yog ntshaw kom nyob twj ywm unnoticed, noj tawm nyob rau hauv txoj kev.

Dav-angle lo ntsiab muag "Canon" yog kab pheeb ces kaum teb ntawm view ntawm 100 degrees, thiab cov dav - 88 (pa 35-hli ncej).

Yuav ua li cas ua lub dav-angle lens? lawv nta

- Lawv muaj ib tug loj muaj peev xwm qhov chaw. Yog li ntawd, cov khoom xwm li nyob rau hauv cov duab, halved. Nyob rau hauv no shooting tsis zoo li cov pa txheem lens. Cias muab, lub dav-angle yuav tsum siv tsis tau rau shooting roob scenery, vim hais tias nws xav grinds.

Yuav kom daws tau qhov teeb meem. Nws yuav tsum tau ntxiv rau xwm ib co loj cov khoom uas yuav tshwm sim nyob rau hauv lub foreground. Nws yuav ua tau:

• ua xua;
• puddles rau hauv txoj kev.

Yog li no yog tsim cov nyhuv uas cov active chaw uas tej zaum yuav ntes cov tuav lub qhov muag.

- Thaum uas siv cov dav-angle lo ntsiab muag, kho qhov muag distortion zaum yuav tshwm sim nyob rau hauv cov dluab. Qhov no chim-zoo li tus curvature (distortion). Lawv tshwm sim nyob rau hauv lub periphery ntawm tus ncej. Tab sis tsis txhob sib ceg tias daim duab zoo deteriorates vim rau qhov cov nyhuv. Tej zaum nws yog rau lwm txoj kev nyob ib ncig ntawm. Muaj pes tsawg leeg ntawm daim duab no mas, yuav tsum tau nyiam ntau siv chim distortion. Yog hais tias koj xum tsis rau distort qhov chaw, ces ib tug los ze zog saib, uas muaj tsis muaj ntoo los yog cov ces kaum ntawm cov npoo ntawm cov vaj tse. Lawv yog ntseeg tau nkhaus. Lub koob yees duab yuav tsum tau khaws cia raws nraim kab rov tav, vim hais tias muaj heaps ntawm verticals.

- Dav-angle lo ntsiab muag muaj lub siab "blikabelnostyu". Yog li ntawd nws yog tsim nyog los saib xyuas cov hauj lwm ntawm lub hnub thaum shooting rau ib hnub ci hnub. Yog hais tias ua tau, siv ib tug lens hood. Yog hais tias koj ib pab tub rog tsis tau nws, koj xav tias yuav ib tug me ntsis teeb meem. Vim lub loj loj ntawm lub dav-lub (77 hli los yog ntau tshaj), nws yog ib qhov nyuaj rau khaws cov hood thiab lub lim. Yog hais tias koj nrhiav tau lawv, ces lawv yuav raug nqi rau koj ib tug dlej npaum li cas.

- Dav-angle lo ntsiab muag rau Canon, ua ke nrog luv luv-muab lens, muaj ib tug kev siv ib polarizing lim. Txij li thaum lub ntuj sis tsis ncaj polarization ntawm ntau lub kaum sab xis, nws yuav tshwm sim ib tug maub xiav chaw. Yog hais tias koj xav nyob rau hauv ib kab rov tav Toj roob hauv pes nrog lub ntuj, lub dav-angle yuav tsum tsis txhob siv nrog ib tug polarizer. Yog hais tias koj tseem xav mus sim, koj yuav tsum tau xaiv rau ib tug polarizing lim nrog ib tug nqaim ceev nplhaib. Lawv yog ua los rau ntau-angle lo ntsiab muag, thiab tsis pub kom tau txais mus rau hauv ib tug tsaus ces kaum ntawm lub thav duab.

- Nrog rau kev siv ntawm tej photographic phiaj kos flash ib txhij nrog ib tug luv luv-ib inefficient. Tsis muaj zog Flash yuav tsis tau mus rau ntsiab lub enormous ntau yam ntawm qhov chaw thiab yuav tsum tau nyob ze rau qhov lens nrog ib tug loj hauv lub cheeb. Yog li ntawd, cov duab yuav tsaus ntuj chaw nyob rau hauv qhov zoo ntawm ib lub voj voog. Nws tshwm sim vim lub fact tias cov flash lens yuav muab pov ib tug duab ntxoov ntxoo. Nws tau txais mus rau hauv qab ncej.

Ntawm cov hoob kawm, tsis yog ib tug ntau-angle lo ntsiab muag nrum duab ntxoov ntxoo, thiab lwm yam. Txawm li cas los, vim rau qhov me me teb pom, nws tsis yog nyob rau hauv tus ncej.

Txoj kev tawm ntawm qhov teeb meem no - mus kom cov focal ntev los yog kev siv outrigger flash.