Guqula ubude obunamaphesenti angu-35mm kumakhamera we-APS-C digital
Amakhamera athile adijithali adinga ukuphindaphinda ubude obuningi ukuze kuqinisekiswe ukuthi i-photographer ithola isimo sengqondo abayilindele. Lokhu kwaba yinto ebalulekile lapho izithombe zishintsha kusuka kwifilimu kuya kwedijithali, futhi izinguquko zenziwa kwamakhamera amaningi e- DSLR athinta ubude obugxile obukhulu bama-lens.
Uma ubhanqa ikhamera yedijithali ene-lens, kubalulekile ukwazi ukuthi ngabe umphindiseli wesikhathi eside obhekene nendawo kufanele ucatshangelwe yini-kungasithinta ngokuphawulekayo ilensi oyithenga ngoba ungase uthenge ilensi engahlangabezane nezidingo zakho ezithile.
Iyini i-Focal Length Multiplier?
Amakhamera amaningi e-DSLR angama- APS-C, aphinde abizwe ngokuthi ama-camera frame frame . Lokhu kusho ukuthi baneenzwa ezincane (15mm x 22.5mm) kunendawo yefilimu engu-35mm (36mm x 24mm). Lo umehluko udlala uma ukhuluma ngobude obukhulu bama-lens .
Sekuyisikhathi eside ifomethi yefilimu engu-35mm isetshenziselwa ukulinganisa izithombe ukuze inqume ubude obukhulu bama-lens abaningi abajwayele ukuthwebula izithombe. Isibonelo, i-50mm ibhekwa njengesijwayelekile, i-24mm ibanzi, futhi i-200mm i-telephoto.
Njengoba ikhamera ye-APS-C inenzwa yesithombe encane, ubude obubekiwe balezi lensi kufanele buguqulwe besebenzisa umphindisi wokuhlala okugxile.
Ibala i-Focal Length Magnifier
I-multiplier length length multiplier ihluka phakathi kwabakhiqizi. Lokhu kungahlukahluka ngomzimba wekhamera, nakuba iningi labakhiqizi abanjengoCanon likufuna ukuba ukwandise ubude bokugxila kwe-lens ngo-x1.6. U-Nikon noFiji bavame ukusebenzisa i-x1.5 ne-Olympus isebenzisa i-x2.
Lokhu kusho ukuthi isithombe sizobamba ifreyimu elincane izikhathi ezingu-1.6 kunalokho okuzobanjwa ngefilimu engama-35mm.
I-multiplier length length multiplier ayinayo umphumela ebangeni elibalulekile lamalensi asetshenziswe nge-frame ephelele ye-DSLR ngoba la makhamera asebenzisa ifomethi efanayo nefilimu engama-35mm.
Konke lokhu akusho ukuthi ukwandisa i-lens egcwele ifreyimu ngokukhulisa ubude besikhathi eside; Empeleni, i-equation ibheka into enjengale:
Ubude be-Focal Length ÷ Ubude obude be-Magnifier = Ubude bokugxila kwe-APS-C
Endabeni ye-Canon APS-C ne-x1.6 izobukeka kanje:
50mm ÷ 1.6 = 31.25mm
Ngakolunye uhlangothi, uma ubeka i-APS-C lens emzimbeni womkhamera ogcwele (ungakutshelwanga ngoba uzothola i- vignetting ), uzobe ukwandisa i -lens ngesikhulisi sobude obude. Lokhu kuzokunika ubude bakho obude obugxile.
Cabanga nge-Angle View
Kuningi ngombono wokubuka maqondana nesayizi yokuthunjwa kune-length yangempela ye-lens, ngakho-ke i-lenti ye-50mm empeleni i-lens enkulu e-APS-C.
Lena yingxenye eyinselele kubathwebuli bezithombe abaye basebenzisa ifilimu engu-35mm iminyaka futhi kuthatha isikhathi ukumboza ingqondo yakho ngale ndlela entsha yokucabanga. Zikhathazeke ngombono wokubuka kwe-lens esikhundleni sobude obugxile.
Nazi ezinye zezintambo ezijwayelekile zamalensi ekuboneni usizo ngokuguqulwa:
| I-Angle of View (amazinga) | 35mm 'I-Frame Full' | I-Canon x1.6 I-APS-C 'Crop' | I-Nikon x1.5 I-APS-C 'Crop' | |
|---|---|---|---|---|
| I-Telephoto Enhle | 2.1 | 600mm | 375mm | 400mm |
| I-Telephoto ende | 4.3 | 300mm | 187.5mm | 200mm |
| I-Telephoto | 9.5 | 135mm | 84.3mm | 90mm |
| Okujwayelekile | 39.6 | 50mm | 31.3mm | 33.3mm |
| Okujwayelekile-Okujwayelekile | 54.4 | 35mm | 21.8mm | 23.3mm |
| Wide | 65.5 | 28mm | 17.5mm | 18.7mm |
| Kakhulu kakhulu | 73.7 | 24mm | 15mm | 16mm |
| Super Wide | 84 | 20mm | 12.5mm | 13.3mm |
| I-Ultra Wide | 96.7 | 16mm | 10mm | 10.7mm |
I-Digital Lens Fix
Ukuze ugweme le nkinga, abakhiqizi abaningi bekhamera manje bakhiqiza ama-lens "adijithali" athile, asebenza kuphela namakhamera we-APS-C.
Lawa ma-lens ayabonisa ubude obuvamile obuvamile, futhi afuna ukubuyiswa kwesikhathi eside okumele kusetshenziswe kuwo, kodwa ahloselwe ukumboza kuphela indawo yensimu esetshenziswe ngamakhamera esitshalo sezitshalo.
Ngokuvamile zihamba kahle kakhulu futhi zihambelana kakhulu kunezilingo ezivamile zekhamera.