Yintoni naI-Fisheye Lens?Ilensi ye-fisheye luhlobo lwelensi yekhamera eyilelwe ukudala umbono obanzi wescene, ngokugqwetheka okunamandla nokwahlukileyo. Iilensi zeFisheye zinokubamba indawo ebanzi kakhulu yokujonga, rhoqo ukuya kuthi ga kwi-180 degrees okanye ngaphezulu, evumela umfoti ukuba abambe indawo enkulu kakhulu yendawo yesigameko ngokudubula nje okukodwa.

Ilensi ye-fisheye

Iilensi zeFisheye zithiywe ngegama lesiphumo sazo esigqwethekileyo, esenza umfanekiso ojikelezayo okanye omile okwebharele onokugqithiswa kwaye wenze isitayile. Isiphumo sokuphazamiseka sibangelwa indlela i-lens ejika ngayo ukukhanya njengoko idlula kwizinto zeglasi ezigobileyo zelensi. Esi siphumo sinokusetyenziswa ngokuyilayo ngabafoti ukwenza imifanekiso ekhethekileyo kunye neguquguqukayo, kodwa inokuba ngumda ukuba umfanekiso obukeka ngokwendalo uyafunwa.

Iilensi ze-Fisheye ziza kwiindidi ezininzi ezahlukeneyo, ezibandakanya iilensi ze-fisheye ezijikelezayo, iilensi ze-fisheye ezizijikelezileyo, kunye neelensi ze-fisheye ezigcwele isakhelo. Nganye kwezi ntlobo zeelensi ze-fisheye zineempawu zayo ezizodwa kwaye zifanelekile kwiintlobo ezahlukeneyo zokufota.

Ngokungafaniyo neelensi zerectilinear,iilensi zamehloazibonakali ngokupheleleyo kubude bokujongisisa kunye nokuvuleka kuphela. I-engile yokujonga, i-diameter yomfanekiso, uhlobo lwentelekelelo, kunye ne-sensor coverage zonke ziyahluka ngokuzimeleyo kwezi.

Iintlobo zokusebenzisa ifomathi

Iilensi zamehlo ezisangqa

Uhlobo lokuqala lwee-lens ze-fisheye eziphuhlisiwe zaziyi-lens "zesetyhula" ezinokuthi zenze umfanekiso ojikelezayo kunye nentsimi ye-180-degree. Zinobude obufutshane kakhulu bokugxila, obuqala ukusuka kwi-7mm ukuya kwi-10mm, nto leyo ebenza ukuba babambe umbono obanzi kakhulu wendawo.

Yenza isangqa kwilensi ye-fisheye

Iilensi ze-fisheye ezijikelezayo ziyilelwe ukuvelisa umfanekiso ojikelezayo kwinzwa yekhamera okanye kwinqwelomoya yefilimu. Oku kuthetha ukuba umfanekiso obangelwayo unomfanekiso ojikelezayo kunye nemida emnyama ejikeleze indawo ejikelezayo, udala umphumo oyingqayizivele "we-fishbowl". Iikona zomfanekiso we-fisheye ojikelezayo ziya kuba mnyama ngokupheleleyo. Obu bumnyama bohlukile kwi-vignetting ethe chu kwiilensi ze-rectilinear kwaye iqalisa ngequbuliso. Umfanekiso ojikelezayo ungasetyenziselwa ukudala iingoma ezinomdla kunye nobuchule. Ezi zine-180° ethe nkqo, ethe tyaba kunye ne-diagonal engile yokujonga. Kodwa inokuba ngumda ukuba umfoti ufuna umyinge we-rectangular aspect ratio.

Isetyhulaiilensi zamehloziqhele ukusetyenziswa kwiifoto zoyilo kunye nobugcisa, njengokufota uyilo, ukufota okungaqhelekanga, kunye nokufota kwezemidlalo okugqithisileyo. Zisenokusetyenziswa kwizicelo zenzululwazi kunye nezobuchwephesha apho imbono ebanzi iyafuneka, njenge-astronomy okanye i-microscope.

Iilensi ze-diagonal fisheye (eyaziwa ngokuba yifreyimu epheleleyo okanye uxande)

Njengoko iilensi zamehlo eentlanzi zazisiya zithandwa ngokufota ngokubanzi, iinkampani zekhamera zaqala ukwenza iilensi zamehlo eentlanzi ezinesangqa somfanekiso owandisiweyo ukuze zigqume yonke isakhelo sefilimu exande. Zibizwa ngokuba yi-diagonal, okanye ngamanye amaxesha "uxande" okanye "i-full-frame", i-fisheyes.

Iilensi ze-Diagonal fisheye luhlobo lwelensi ye-fisheye enokudala umbono we-ultra-wide-angle wendawo yesiganeko kunye nentsimi ye-diagonal yokujonga i-180 ukuya kwi-190 degrees, ngelixa i-engile yokujonga ethe tye nethe nkqo iya kuba ncinane. Ezi lens zivelisa imbono egqwethekileyo kwaye ibaxiwe, kodwa ngokungafaniyo neelensi ze-fisheye ezijikelezayo, zigcwalisa isakhelo esixande sesenso yekhamera okanye inqwelomoya yefilimu. Ukufumana isiphumo esifanayo kwiikhamera zedijithali ezinezinzwa ezincinci, ubude obufutshane bogxininiso luyafuneka.

Isiphumo sokuphazamiseka kwediagonali-lens ye-fisheyeidala inkangeleko eyodwa nemangalisayo enokusetyenziswa ngobuchule ngabafoti ukufota imifanekiso eguqukayo netsala amehlo. Imbono ebaxiweyo inokudala ubunzulu kunye nokunyakaza kwindawo, kwaye ingasetyenziselwa ukudala iingoma ezingabonakaliyo kunye ne-surreal.

I-diagonal fisheye lens

Umfanekiso okanye iilensi ze-fisheye ezinqamlezileyo

Ukunqunyulwa-isangqaiilensi zamehlololunye uhlobo lwelensi ye-fisheye ekhoyo, ukongeza kwisetyhula kunye ne-full-frame lens eye-fisheye endiyikhankanyileyo ngaphambili. Indawo ephakathi phakathi kwediagonal nesetyhula ye-fisheye inomfanekiso ojikelezayo olungiselelwe ububanzi befomathi yefilimu kunobude. Ngenxa yoko, kuyo nayiphi na ifomathi yefilimu engeyiyo yesikwere, umfanekiso ojikelezayo uya kunqunyulwa phezulu nasezantsi, kodwa ubonise imiphetho emnyama ekhohlo nasekunene. Le fomati ibizwa ngokuba yi “portrait” fisheye.

Ilensi ye-fisheye enesangqa esinqunyiweyo

Ezi lens ziqhele ukuba nobude obugxile kwi-10-13mm kunye nebala lokujonga elimalunga ne-180 degrees kwikhamera yesivamvo sesityalo.

Iilensi ze-Ccropped-Circle fisheye ziyindlela efikelelekayo xa kuthelekiswa ne-full-frame-full-frame lens eye-fisheye, kwaye zibonelela ngombono okhethekileyo onempembelelo ejikelezayo yokuguqula.

Iilensi zamehlo ezincinci

Iikhamera zedijithali ezincinci, ngakumbi xa zisetyenziswa njengeekhamera zokhuseleko, zihlala zineelensi ze-fisheye ukwandisa ukhuseleko. Iilensi ze-Fisheye ezincinci, ezifana ne-M12 iilensi ze-fisheye kunye ne-M8 iilensi ze-fisheye, ziyilelwe i-mobile-format sensorers i-imagers eqhelekileyo esetyenziswa kwiikhamera zokhuseleko. . Ngokuxhomekeke kwindawo esebenzayo ye-sensor yomfanekiso, i-lens efanayo inokwenza umfanekiso wesetyhula kwi-sensor yomfanekiso omkhulu (umz. 1⁄2″), kunye nesakhelo esipheleleyo kwincinci (umz. 1⁄4″).

Isampulu yemifanekiso ethathwe yiCHANCCTV's M12iilensi zamehlo:

Isampulu yemifanekiso ethathwe yi-CHANCCTV's M12 fisheye lens-01

Isampulu yemifanekiso ethathwe yi-CHANCCTV's M12 fisheye lens-02

Isampulu yemifanekiso ethathwe yi-CHANCCTV's M12 fisheye lens-03