Menene aFisheye Lens?Lens na kifi wani nau'in ruwan tabarau ne na kyamara wanda aka ƙera shi don ƙirƙirar yanayi mai faɗin kusurwa, tare da murɗawar gani mai ƙarfi da ban mamaki.Ruwan tabarau na Fisheye na iya ɗaukar filin kallo mai faɗin gaske, sau da yawa har zuwa digiri 180 ko fiye, wanda ke ba mai ɗaukar hoto damar ɗaukar yanki mai girman gaske a cikin harbi ɗaya.

Ruwan ruwan kifi

Ana kiran ruwan tabarau na Fisheye bayan tasirin murdiya na musamman, wanda ke haifar da hoto mai madauwari ko ganga wanda za'a iya wuce gona da iri da salo.Tasirin murdiya yana faruwa ne ta hanyar yadda ruwan tabarau ke karkatar da haske yayin da yake wucewa ta cikin abubuwan gilashin mai lanƙwasa na ruwan tabarau.Ana iya amfani da wannan tasirin ta hanyar ƙirƙira ta masu ɗaukar hoto don ƙirƙirar hotuna na musamman da ƙarfi, amma kuma yana iya zama iyakancewa idan ana son hoto mai kama da halitta.

Ruwan tabarau na Fisheye sun zo cikin nau'o'i daban-daban, ciki har da ruwan tabarau na kifin kifi madauwari, ruwan tabarau na kifi mai da'ira, da cikakken ruwan tabarau na kifi.Kowane irin nau'in ruwan tabarau na kifi yana da nasa halaye na musamman kuma ya dace da nau'ikan hoto daban-daban.

Ba kamar ruwan tabarau na rectilinear ba,ruwan tabarau na kifiba su da cikakkiyar siffa da tsayin daka da buɗaɗɗe kaɗai.Matsakaicin gani, diamita na hoto, nau'in tsinkaya, da ɗaukar hoto duk sun bambanta ba tare da waɗannan ba.

Nau'in amfani da tsari

ruwan tabarau na kifin madauwari

Nau'in farko na ruwan tabarau na kifi da aka ɓullo da su sune ruwan tabarau na "madauwari" waɗanda zasu iya ƙirƙirar hoto mai da'ira tare da filin kallo na 180-digiri.Suna da ɗan gajeren nesa mai tsayi, yawanci kama daga 7mm zuwa 10mm, wanda ke ba su damar ɗaukar hoto mai faɗin kusurwa na wurin.

Da'irar ruwan tabarau na kifi

An ƙera ruwan tabarau na kifin madauwari don samar da hoton madauwari akan firikwensin kyamara ko jirgin fim.Wannan yana nufin cewa hoton da aka samu yana da siffar madauwari tare da baƙar fata da ke kewaye da yankin madauwari, yana haifar da tasiri na musamman na "fishbow".Kusurwar hoton kifin madauwari zai zama baki gaba ɗaya.Wannan baƙar fata ya sha bamban da vignetting a hankali na lens na rectilinear kuma yana farawa ba zato ba tsammani.Za a iya amfani da hoton madauwari don ƙirƙirar abubuwan ban sha'awa da ƙirƙira.Waɗannan suna da 180° a tsaye, a kwance da kusurwar kallo.Amma kuma yana iya zama iyakancewa idan mai daukar hoto yana son rabon al'amari rectangular.

madauwariruwan tabarau na kifiyawanci ana amfani da su a cikin ƙirƙira da ɗaukar hoto, kamar a cikin hoto na gine-gine, ɗaukar hoto, da matsanancin ɗaukar hoto na wasanni.Hakanan za'a iya amfani da su don aikace-aikacen kimiyya da fasaha inda ake buƙatar hangen nesa mai faɗi, kamar a cikin falaki ko microscopy.

Diagonal fisheye ruwan tabarau (aka cikakken-frame ko rectangular)

Kamar yadda ruwan tabarau na kifi ya sami shahara a cikin daukar hoto gabaɗaya, kamfanonin kamara sun fara kera ruwan tabarau na kifi tare da da'irar hoto mai girma don rufe gabaɗayan firam ɗin fina-finai rectangular.Ana kiran su diagonal, ko wani lokacin "rectangular" ko "cikakken-frame", kifi.

Diagonal fisheye ruwan tabarau nau'i ne na ruwan tabarau na kifi wanda zai iya ƙirƙirar ra'ayi mai faɗin kusurwa mai faɗin yanayi tare da filin kallon diagonal na digiri 180 zuwa 190, yayin da kusurwoyi na kwance da na tsaye za su kasance ƙarami.Waɗannan ruwan tabarau suna haifar da gurɓatacciyar hangen nesa da ƙari, amma ba kamar ruwan tabarau na kifin madauwari ba, suna cika gabaɗayan firam ɗin firikwensin kyamara ko jirgin fim.Don samun tasiri iri ɗaya akan kyamarori na dijital tare da ƙarami na firikwensin, ana buƙatar gajeriyar tsayi mai tsayi.

Tasirin murdiya na diagonalruwan tabarau na kifiyana ƙirƙirar kyan gani na musamman da ban mamaki wanda masu daukar hoto za su iya amfani da su ta hanyar ƙirƙira don ɗaukar hotuna masu ƙarfi da ɗaukar ido.Mahimman hangen nesa na iya haifar da zurfin tunani da motsi a cikin fage, kuma ana iya amfani da shi don ƙirƙirar abubuwan da ba za a iya gani ba.

Diagonal fisheye ruwan tabarau

Hoto ko yanke-da'irar ruwan tabarau na kifi

Yanke-da'iraruwan tabarau na kifiwani nau'in ruwan tabarau na kifi ne da ke akwai, ban da madauwari mai da'ira da cikakken ruwan tabarau na kifi da na ambata a baya.Matsakaici tsakanin kifin kifin diagonal da madauwari ya ƙunshi hoton madauwari da aka inganta don faɗin tsarin fim maimakon tsayi.A sakamakon haka, a kan kowane tsarin fim ɗin da ba na murabba'i ba, za a yanke hoton madauwari a sama da ƙasa, amma har yanzu yana nuna baƙar fata a hagu da dama.Wannan sigar ana kiranta “hotuna” fisheye.

Ruwan tabarau na kifi mai da'ira

Waɗannan ruwan tabarau yawanci suna da tsayin daka na kusan 10-13mm da filin kallo kusan digiri 180 akan kyamarar firikwensin amfanin gona.

Ruwan tabarau na kifin da aka yanke-da'irar zaɓi zaɓi ne mafi araha idan aka kwatanta da cikakken firam ɗin ruwan tabarau na kifi, kuma suna ba da hangen nesa na musamman tare da tasirin murdiya.

Ƙananan ruwan tabarau na kifi

Ƙananan kyamarori na dijital, musamman idan ana amfani da su azaman kyamarar tsaro, yawanci suna da ruwan tabarau na kifi don haɓaka ɗaukar hoto.Ƙananan ruwan tabarau na kifi, kamar ruwan tabarau na M12 fisheye da ruwan tabarau na M8 fisheye, an tsara su don ƙananan sifofi na firikwensin da aka saba amfani da su a cikin kyamarori masu tsaro. Shahararrun tsarin firikwensin hoto da aka yi amfani da su sun haɗa da 1⁄4″, 1⁄3″, da 1⁄2″ .Dangane da wurin aiki na firikwensin hoton, ruwan tabarau iri ɗaya na iya samar da hoto mai madauwari akan babban firikwensin hoto (misali 1⁄2″), da cikakken firam akan ƙarami (misali 1⁄4″).

Misalin hotunan da CHANCCTV's M12 ya ɗaukaruwan tabarau na kifi:

Hotunan samfurin da CHANCCTV's M12 fisheye lenses-01 ya ɗauka

Hotunan samfurin da CHANCCTV's M12 fisheye lenses-02 ya ɗauka

Hotunan samfurin da CHANCCTV's M12 fisheye lenses-03 suka ɗauka