Chii chinonzi aFisheye Lens?A fisheye lens imhando yekamera lens yakagadzirirwa kugadzira kuona kwakakura-kona kwechiitiko, ine simba rakasimba uye rakasiyana rekuona kukanganisa.Malenzi eFisheye anogona kutora nzvimbo yakakura kwazvo yekuona, kazhinji inosvika 180 madhigirii kana kupfuura, izvo zvinobvumira mutori wemifananidzo kutora nzvimbo yakakura kwazvo yechiitiko mupfuti imwe chete.

Iyo fisheye lenzi

Marenzi eFisheye anotumidzwa zita rekusarudzika kwawo, izvo zvinogadzira mufananidzo wedenderedzwa kana mbiya unogona kunyanya kuwedzeredzwa uye kunyorwa.Iko kukanganisa kunokonzerwa nenzira iyo lens inofuratira chiedza apo inopfuura nepakati pegirazi rakakombama zvinhu zvelens.Mhedzisiro iyi inogona kushandiswa nehunyanzvi nevatori vemifananidzo kugadzira yakasarudzika uye ine simba mifananidzo, asi inogona zvakare kuve mhedziso kana mufananidzo unotaridzika wakasarudzika uchidikanwa.

Malenzi eFisheye anouya mumhando dzakasiyana siyana, anosanganisira denderedzwa hove lenzi, akacheka-denderedzwa hove lenzi, uye yakazara-frame fisheye lenzi.Imwe neimwe yemhando idzi dzefisheye lenses ine hunhu hwayo hwakasiyana uye inokodzera mhando dzakasiyana dzemifananidzo.

Kusiyana nerectilinear lenses,fisheye lenzihadzina kunyatsoratidzwa nekureba kwepakati uye pakavhurika chete.Angle yekuona, dhayamita yemufananidzo, rudzi rwekufungidzira, uye kufukidzwa kwema sensor zvese zvinosiyana zvakazvimiririra izvi.

Mhando dzekushandisa format

Circular fisheye lenses

Mhando yekutanga yefisheye lenses yakagadzirwa yaiva "denderedzwa" lenses inogona kugadzira mufananidzo wedenderedzwa ne 180-degree field of view.Ivo vane hurefu hwakanyanya hupfupi hwekutarisa, kazhinji kubva pa7mm kusvika 10mm, izvo zvinovagonesa kutora yakanyanyisa-ekona yekuona kwechiitiko.

Denderedzwa fisheye lenzi

Circular fisheye lenses akagadzirirwa kugadzira mufananidzo wedenderedzwa pane sensor kamera kana firimu ndege.Izvi zvinoreva kuti mufananidzo unoguma une chimiro chedenderedzwa nemiganhu yakasviba yakapoteredza nzvimbo yakatenderera, ichigadzira yakasarudzika "fishbowl" effect.Makona emufananidzo wedenderedzwa rehove ichave yakasviba zvachose.Hutema uhwu hwakasiyana kubva zvishoma nezvishoma vignetting ye rectilinear lenses uye inotanga pakarepo.Mufananidzo wedenderedzwa unogona kushandiswa kugadzira zvinonakidza uye kugadzira zvinyorwa.Aya ane 180 ° yakatwasuka, yakachinjika uye diagonal kona yekuona.Asi zvinogona zvakare kuve muganho kana mutori wemifananidzo achida rectangular aspect ratio.

Circularfisheye lenzianowanzo shandiswa mukugadzira uye hunyanzvi kutora mafoto, senge mumifananidzo yekuvaka, kutorwa kwemifananidzo, uye yakanyanyisa mitambo yemifananidzo.Zvinogona zvakare kushandiswa kwesainzi uye tekinoroji zvikumbiro panodiwa maonero akafara, semuchadenga kana microscope.

Diagonal fisheye lenses (aka yakazara-frame kana rectangular)

Sezvo malenzi ehove akawedzera mukurumbira mukutorwa kwemifananidzo, makambani emakamera akatanga kugadzira lenzi dzehove dzine denderedzwa remufananidzo rakakurisa kuti rivhare firimu rese rectangular.Ivo vanonzi diagonal, kana dzimwe nguva "rectangular" kana "full-frame", fisheyes.

Diagonal fisheye lenses imhando yehove eye lens iyo inogona kugadzira iyo yekupedzisira-yakafara-ekona yekuona yechiitiko ine diagonal munda wekuona we180 kusvika 190 madhigirii, ukuwo makona akachinjika uye akatwasuka ekuona achange ari madiki.Aya malenzi anogadzira maonero akashatiswa uye akawedzeredzwa, asi kusiyana nedenderedzwa rehove lenzi, anozadza iyo yese rectangular furemu ye sensor kamera kana firimu ndege.Kuti uwane mhedzisiro yakafanana pamakamera edhijitari ane madiki sensors, mapfupi ekutarisa kureba anodiwa.

Iko kukanganisa mhedzisiro ye diagonalfisheye lenziinogadzira chitarisiko chakasiyana uye chinoshamisa chinogona kushandiswa nehunyanzvi nevatorwa kutora mifananidzo ine simba uye inobata maziso.Maonero ekuwedzera anogona kugadzira pfungwa yekudzika uye kufamba muchiitiko, uye zvakare inogona kushandiswa kugadzira abstract uye surreal nziyo.

Diagonal fisheye lenzi

Portrait kana cropped-denderedzwa hove lenzi

Cropped-denderedzwafisheye lenzindeimwe mhando yefisheye lens iripo, kuwedzera kune denderedzwa hove uye yakazara-frame fisheye lenses dzandambotaura.Yepakati pakati pe diagonal uye denderedzwa ziso rehove rine mufananidzo wedenderedzwa wakagadziridzwa kuhupamhi hwemafomati efirimu kwete kureba.Nekuda kweizvozvo, pane chero isiri-square firimu fomati, mufananidzo wedenderedzwa uchatemwa kumusoro uye pasi, asi uchiri kuratidza matema matema kuruboshwe nekurudyi.Iyi fomati inonzi "portrait" fisheye.

Cropped-denderedzwa fisheye lenzi

Aya malenzi anowanzo kuve nekutarisa kureba kwakatenderedza 10-13mm uye ndima yekuona inosvika 180 madhigirii pane chirimwa-sensor kamera.

Cropped-circle fisheye lenses isarudzo inodhura zvakanyanya kana ichienzaniswa neyakazara-furemu hove lenzi, uye inopa yakasarudzika maonero ane denderedzwa kukanganisa maitiro.

Miniature fisheye lenses

Miniature digitaalinen makamera, kunyanya kana akashandiswa semakamera ekuchengetedza, anowanzoita kunge ane fisheye lens kuti awedzere kuvharika.Miniature fisheye lenses, akadai seM12 fisheye lenses uye M8 fisheye lenses, akagadzirirwa madiki-format sensors imagers anowanzo shandiswa mumakamera ekuchengetedza.Inonyanya kufarirwa yemifananidzo sensor format sizes inoshandiswa inosanganisira 1⁄4″, 1⁄3″, uye 1⁄2″ .Zvichienderana nenzvimbo inoshanda ye sensor yemufananidzo, iyo lens imwechete inogona kugadzira mufananidzo wedenderedzwa pane yakakura mufananidzo sensor (eg 1⁄2″), uye yakazara furemu pane diki (eg 1⁄4″).

Mifananidzo yemuenzaniso yakatorwa neCHANCCTV's M12fisheye lenzi:

Mifananidzo yemuenzaniso yakatorwa neCHANCCTV's M12 fisheye lenses-01

Mifananidzo yemuenzaniso yakatorwa neCHANCCTV's M12 fisheye lenses-02

Mifananidzo yemuenzaniso yakatorwa neCHANCCTV's M12 fisheye lenses-03