MeneneRuwan FisheyeGilashin fisheye wani nau'in ruwan tabarau ne na kyamara wanda aka tsara don ƙirƙirar hangen nesa mai faɗi na wani wuri, tare da karkacewar gani mai ƙarfi da ban mamaki. Gilashin fisheye na iya ɗaukar sararin gani mai faɗi, sau da yawa har zuwa digiri 180 ko fiye, wanda ke ba mai ɗaukar hoto damar ɗaukar babban yanki na wurin a cikin hoto ɗaya.

Gilashin Fisheye

Gilashin Fisheye an sanya musu suna ne saboda tasirinsu na musamman na karkacewa, wanda ke haifar da hoto mai siffar da'ira ko ganga wanda za a iya ƙara girmansa da kuma salo sosai. Tasirin karkacewa yana faruwa ne ta hanyar yadda ruwan tabarau ke haskaka haske yayin da yake ratsa abubuwan gilashin da ke lanƙwasa na ruwan tabarau. Masu ɗaukar hoto za su iya amfani da wannan tasirin ta hanyar ƙirƙira don ƙirƙirar hotuna na musamman da masu motsi, amma kuma yana iya zama iyakancewa idan ana son hoto mai kama da na halitta.

Gilashin Fisheye suna zuwa da nau'o'i daban-daban, ciki har da gilashin fisheye mai zagaye, gilashin fisheye mai zagaye, da kuma gilashin fisheye mai cikakken tsari. Kowanne daga cikin waɗannan nau'ikan gilashin fisheye yana da nasa halaye na musamman kuma ya dace da nau'ikan daukar hoto daban-daban.

Ba kamar ruwan tabarau na rectilinear ba,Gilashin FisheyeBa a cika siffanta su da tsayin daka da kuma buɗewar da ke tsakanin su ba. Kusurwar gani, diamita na hoto, nau'in hasashe, da kuma murfin firikwensin duk sun bambanta dangane da waɗannan.

Nau'in tsarin da ake amfani da shi

Gilashin fisheye mai zagaye

Nau'in farko na ruwan tabarau na fisheye da aka ƙirƙiro su ne ruwan tabarau na "madauwari" waɗanda za su iya ƙirƙirar hoto mai zagaye tare da filin kallo na digiri 180. Suna da ɗan gajeren tsayin daka, yawanci daga 7mm zuwa 10mm, wanda ke ba su damar ɗaukar hoto mai faɗi sosai na wurin.

Gilashin fisheye na da'ira

An ƙera ruwan tabarau na kifin da'ira don samar da hoto mai zagaye a kan firikwensin kyamara ko jirgin fim. Wannan yana nufin cewa hoton da aka samo yana da siffar zagaye tare da iyakokin baƙi da ke kewaye da yankin da'ira, yana ƙirƙirar tasirin "kwanon kifi". Kusurwoyin hoton kifin da'ira za su zama baƙi gaba ɗaya. Wannan baƙar fata ya bambanta da ruwan tabarau na rectilinear a hankali kuma yana kunnawa kwatsam. Ana iya amfani da hoton da'ira don ƙirƙirar abubuwan da ke da ban sha'awa da ƙirƙira. Waɗannan suna da kusurwar kallo ta tsaye, kwance da kuma ta kusurwa ta 180°. Amma kuma yana iya zama iyakancewa idan mai ɗaukar hoto yana son rabon al'amari mai kusurwa huɗu.

Da'iraGilashin FisheyeAna amfani da su galibi a cikin daukar hoto mai ƙirƙira da fasaha, kamar a cikin daukar hoto na gine-gine, daukar hoto mai kama da juna, da kuma daukar hoto mai tsauri a wasanni. Haka kuma ana iya amfani da su don aikace-aikacen kimiyya da fasaha inda ake buƙatar kallon kusurwa mai faɗi, kamar a cikin ilmin taurari ko na'urar hangen nesa.

Gilashin fisheye mai siffar diagonal (wanda aka fi sani da cikakken firam ko murabba'i mai siffar murabba'i)

Yayin da ruwan tabarau na fisheye suka shahara a daukar hoto na yau da kullun, kamfanonin kyamara sun fara kera ruwan tabarau na fisheye tare da da'irar hoto mai faɗi don rufe dukkan firam ɗin fim mai kusurwa huɗu. Ana kiransu da diagonal, ko kuma wani lokacin "mai kusurwa huɗu" ko "cikakken firam", fisheye.

Gilashin fisheye na Diagonal wani nau'in ruwan tabarau ne na fisheye wanda zai iya ƙirƙirar hangen nesa mai faɗi-faɗi na wani yanayi tare da hangen nesa na diagonal na digiri 180 zuwa 190, yayin da kusurwoyin gani na kwance da tsaye za su ƙanƙanta. Waɗannan ruwan tabarau suna samar da hangen nesa mai karkacewa da ƙari, amma ba kamar gilashin fisheye mai zagaye ba, suna cika dukkan firam ɗin murabba'i na firikwensin kyamara ko jirgin fim. Don samun irin wannan tasirin akan kyamarorin dijital tare da ƙananan na'urori masu auna firikwensin, ana buƙatar gajerun tsayin mai da hankali.

Tasirin karkacewar diagonalruwan tabarau na fisheyeyana ƙirƙirar wani yanayi na musamman mai ban mamaki wanda masu ɗaukar hoto za su iya amfani da shi ta hanyar ƙirƙira don ɗaukar hotuna masu ban sha'awa da jan hankali. Ra'ayin da aka yi ƙari zai iya ƙirƙirar jin zurfin da motsi a cikin wani yanayi, kuma ana iya amfani da shi don ƙirƙirar waƙoƙi masu ban mamaki da ban mamaki.

Gilashin fisheye mai siffar diagonal

Gilashin fisheye mai hoto ko da'ira

Da'ira mai yankewaGilashin FisheyeWani nau'in ruwan tabarau ne na fisheye da ke wanzuwa, ban da ruwan tabarau na fisheye mai zagaye da cikakken firam waɗanda na ambata a baya. Tsakanin fisheye mai zagaye da zagaye ya ƙunshi hoton zagaye da aka inganta don faɗin tsarin fim maimakon tsayi. Sakamakon haka, a kowane tsarin fim mara murabba'i, za a yanke hoton zagaye a sama da ƙasa, amma har yanzu yana nuna gefuna baƙi a hagu da dama. Ana kiran wannan tsarin fisheye mai "hoto".

Gilashin fisheye mai da'ira da aka yanke

Waɗannan ruwan tabarau galibi suna da tsawon mai da hankali na kusan 10-13mm da kuma filin kallon kusan digiri 180 akan kyamarar na'urar firikwensin amfanin gona.

Gilashin fisheye masu da'ira-da'ira zaɓi ne mai araha idan aka kwatanta da gilashin fisheye masu cikakken tsari, kuma suna ba da hangen nesa na musamman tare da tasirin karkatar da zagaye.

Ƙananan ruwan tabarau na fisheye

Ƙananan kyamarori na dijital, musamman idan ana amfani da su azaman kyamarorin tsaro, galibi suna da ruwan tabarau na fisheye don haɓaka ɗaukar hoto. Ƙananan ruwan tabarau na fisheye, kamar ruwan tabarau na fisheye na M12 da ruwan tabarau na fisheye na M8, an tsara su ne don ƙananan na'urori masu auna firikwensin da aka saba amfani da su a kyamarorin tsaro. Girman tsarin fisheye na hoto da aka yi amfani da su sun haɗa da 1⁄4″, 1⁄3″, da 1⁄2″. Dangane da yankin da ke aiki na fisheye na hoto, ruwan tabarau ɗaya na iya samar da hoto mai zagaye akan babban fisheye na hoto (misali 1⁄2″), da kuma cikakken fire akan ƙaramin (misali 1⁄4″).

Hotunan da CHANCCTV's M12 suka ɗaukaGilashin Fisheye:

Hotunan da aka ɗauka ta ruwan tabarau na CHANCCTV na M12 fisheye-01

Hotunan da aka ɗauka ta ruwan tabarau na CHANCCTV na M12 fisheye-02

Hotunan da aka ɗauka ta ruwan tabarau na CHANCCTV na M12 fisheye-03