KuyiniIlensi yeFisheyeIlensi yefisheye uhlobo lwelensi yekhamera eyenzelwe ukudala umbono obanzi wesigcawu, ngokuphambuka okunamandla kakhulu nokuhlukile kokubona. Amalensi efisheye angathwebula insimu yombono ebanzi kakhulu, ngokuvamile afinyelela kuma-degree angu-180 noma ngaphezulu, okuvumela umthwebuli wezithombe ukuthi athwebule indawo enkulu kakhulu yesigcawu ngesithombe esisodwa.

Ilensi yeso lenhlanzi

Amalensi e-Fisheye aqanjwe ngomphumela wawo ohlukile wokuhlanekezela, okudala isithombe esiyindilinga noma esifana nebharele esingaba nehaba kakhulu futhi senziwe isitayela. Umphumela wokuhlanekezela ubangelwa indlela ilensi ekhanyisa ngayo ukukhanya njengoba idlula ezintweni zeglasi ezigobile zelensi. Lo mphumela ungasetshenziswa ngobuhlakani ngabathwebuli bezithombe ukudala izithombe eziyingqayizivele neziguquguqukayo, kodwa futhi kungaba umkhawulo uma isithombe esibukeka semvelo sifunwa.

Amalensi e-Fisheye afika ngezinhlobo eziningana ezahlukene, kufaka phakathi amalensi e-fisheye ayindilinga, amalensi e-fisheye ayindilinga enqunyiwe, kanye namalensi e-fisheye anohlaka oluphelele. Uhlobo ngalunye lwalezi zinhlobo zamalensi e-fisheye lunezici zalo ezihlukile futhi lufanele izinhlobo ezahlukene zezithombe.

Ngokungafani namalensi aqondile,amalensi e-fisheyeazibonakali ngokugcwele ngobude bokugxila kanye nokuvulwa kuphela. I-engeli yokubuka, ububanzi besithombe, uhlobo lokubonisa, kanye nokumbozwa kwenzwa konke kuyahlukahluka kuye ngokwalokhu.

Izinhlobo zokusebenzisa ifomethi

Amalensi e-fisheye ayindilinga

Uhlobo lokuqala lwamalensi e-fisheye akhiqizwa kwakuyilensi “eyisiyingi” engakha isithombe esiyindilinga esinombono wensimu engama-degree angu-180. Anebude obufushane kakhulu bokugxila, ngokuvamile obusukela ku-7mm kuya ku-10mm, obuwenza akwazi ukuthwebula umbono wesimo obanzi kakhulu.

Ilensi yeso lenhlanzi elijikelezayo

Amalensi e-fisheye ajikelezayo aklanyelwe ukukhiqiza isithombe esiyindilinga ku-sensor noma i-film plane yekhamera. Lokhu kusho ukuthi isithombe esiphumayo sinesimo esiyindilinga esinemingcele emnyama ezungeze indawo eyindilinga, okudala umphumela ohlukile "we-fishbowl". Amakhona esithombe se-fisheye esiyindilinga azoba mnyama ngokuphelele. Lobu bumnyama buhlukile ekukhanyeni kancane kancane kwamalensi aqondile futhi buqala ngokuzumayo. Isithombe esiyindilinga singasetshenziswa ukudala ukwakheka okuthakazelisayo nokudala. Lokhu kunombono oqondile, ovundlile kanye nowe-diagonal ongu-180°. Kodwa kungaba futhi umkhawulo uma umthwebuli wezithombe efuna isilinganiso se-aspect esingunxande.

Isiyingiamalensi e-fisheyengokuvamile zisetshenziswa ekuthwebuleni izithombe zokudala nezobuciko, njengasezithombeni zezakhiwo, izithombe ezingabonakali, kanye nezithombe zezemidlalo eziyingozi. Zingasetshenziswa futhi ezisetshenziswayo zesayensi kanye nezobuchwepheshe lapho kudingeka khona umbono obanzi, njengasezinkanyezini noma kuma-microscopy.

Amalensi e-fisheye aqondile (aziwa nangokuthi agcwele uhlaka noma angunxande)

Njengoba amalensi e-fisheye ethola ukuthandwa kwezithombe ezivamile, izinkampani zamakhamera zaqala ukukhiqiza amalensi e-fisheye anendilinga yesithombe ekhulisiwe ukuze amboze lonke uhlaka lwefilimu oluyindilinga. Abizwa ngokuthi ama-fisheye aqondile, noma ngezinye izikhathi “ayindilinga” noma “ayindilinga egcwele”.

Amalensi e-fisheye aqondile awuhlobo lwelensi ye-fisheye engadala umbono obanzi kakhulu wesigcawu onensimu yokubuka eqondile engama-degree angu-180 kuya kwangu-190, kuyilapho ama-engeli okubuka aqondile naqondile ezoba mancane. Lawa malensi akhiqiza umbono ophambene kakhulu futhi ogqanyisiwe, kodwa ngokungafani namalensi e-fisheye ayindilinga, agcwalisa lonke uhlaka oluyindilinga lwenzwa noma ifilimu yekhamera. Ukuze uthole umphumela ofanayo kumakhamera edijithali anezinzwa ezincane, ubude obufushane bokugxila buyadingeka.

Umphumela wokuhlanekezela we-diagonalilensi yeso lenhlanziidala ukubukeka okuyingqayizivele nokumangalisayo okungasetshenziswa ngobuhlakani ngabathwebuli bezithombe ukuze bathwebule izithombe ezinamandla neziheha amehlo. Umbono oweqile ungadala umuzwa wokujula nokunyakaza endaweni yesehlakalo, futhi ungasetshenziswa nokudala izingoma ezingacacile nezingavamile.

Ilensi yeso lenhlanzi eliyi-diagonal

Amalensi e-fisheye anombala oqondile noma oyisiyingi esinqunyiwe

Indilinga enqunyiweamalensi e-fisheyekukhona olunye uhlobo lwelensi ye-fisheye olukhona, ngaphezu kwelensi ye-fisheye eyindilinga kanye namalensi e-fisheye anohlaka olugcwele engikhulume ngawo ekuqaleni. I-intermediate phakathi kwe-diagonal kanye ne-fisheye eyindilinga inesithombe esiyindilinga esilungiselelwe ububanzi befomethi yefilimu kunokuphakama. Ngenxa yalokho, kunoma iyiphi ifomethi yefilimu engeyona isikwele, isithombe esiyindilinga sizonqunywa phezulu naphansi, kodwa sisabonisa imiphetho emnyama kwesobunxele nakwesokudla. Le fomethi ibizwa ngokuthi i-fisheye "yesithombe".

Ilensi ye-fisheye eyisiyingi esinqunyiwe

Lawa malensi ngokuvamile anobude obuqondile obungaba ngu-10-13mm kanye nensimu yokubuka engaba amadigri angu-180 kukhamera ye-crop-sensor.

Amalensi e-fisheye ayisiyingi esinqunyiwe ayindlela engabizi kakhulu uma kuqhathaniswa namalensi e-fisheye agcwele uhlaka, futhi anikeza umbono oyingqayizivele onomphumela wokuphambuka okujikelezayo.

Amalensi amancane e-fisheye

Amakhamera amancane edijithali, ikakhulukazi uma esetshenziswa njengamakhamera okuphepha, avame ukuba namalensi e-fisheye ukuze andise ukumbozwa kwawo. Amalensi amancane e-fisheye, njenge-M12 fisheye lens kanye namalensi e-M8 fisheye, aklanyelwe izithombe zezinzwa ezincane ezivame ukusetshenziswa kumakhamera okuphepha. Osayizi befomethi yezinzwa zesithombe abadumile abasetshenziswayo bahlanganisa u-1⁄4″, 1⁄3″, kanye no-1⁄2″. Kuye ngendawo esebenzayo yenzwa yesithombe, ilensi efanayo ingakha isithombe esiyindilinga kunzwa yesithombe enkulu (isb. 1⁄2″), kanye nohlaka oluphelele kuleyo encane (isb. 1⁄4″).

Izithombe eziyisampula ezithathwe yi-M12 ye-CHANCCTVamalensi e-fisheye:

Izithombe zesampula ezithathwe yi-CHANCCTV's M12 fisheye lens-01

Izithombe zesampula ezithathwe yi-CHANCCTV's M12 fisheye lens-02

Izithombe zesampula ezithathwe yi-CHANCCTV's M12 fisheye lens-03