Yini ukubheka lapho ekhetha lens? Ubude befokasi - omunye nemingcele main

Omunye nemingcele main ofuna ukunaka lapho ekhetha lens - ubude ebalulekile. Ithola engela yokubuka, ikhamera iyokuthakazelisa, ukusebenza elilodwa noma kwenye idivaysi ye-optical. Lesi sici ulinganiswa ngamamilimitha, amasentimitha namamitha. Lokhu ipharamitha kubonisa ukuphela sekuseduze kangakanani noma kude ungabona lens. Ubude befokasi kuyinto ubukhulu bomzimba lens ukuthi akashintshi. Akukona kuxhomeke ohlotsheni kwekhamera, ngawo kulesi simiso optical isetshenziswa. Ngokuvamile, ubukhulu lens incike ubude ebalulekile, okusho ukuthi mkhulu kakhulu yinzondo nobugovu, siyoba sikhulu ubude kudivayisi.

Uhlelo optical ine izici ezilandelayo ngokomzimba: indiza ezingemuva uthisha-nhloko ngezingane front futhi bakhulise ubude ebalulekile. Umngcele we sokuqala indiza perpendicular eksisi lens. It kungenziwa akhiwe ngaphakathi kwemingcele kudivayisi, futhi aphume kulo. It kuxhomeke ohlotsheni lens kanye lens ukuma. Ngaphambili ubude ebalulekile - siyindlela yesibili yi sokudubula asithinteki, kodwa emuva - lena isici esibalulekile kakhulu. It Asho ukuthini umgamu umfanekiso abukhali bento ngokufanele ngesikhathi ibanga okungenamkhawulo kusukela kudivayisi kuya indiza main emuva. Kusho ukuthini? Uma into itholakala phambi lens, isithombe kuyoba abukhali ngemuva lens. Le libanga oluhambisana ubude ebalulekile.

izinhlelo Optical zingahlukaniswa zibe izinhlobo ezimbili: fixed kanye variable. Lens ubude ebalulekile zazo ziyahlukahluka, futhi ngokuthi zoom lens futhi varifocal.

Cabanga ngesibonelo ukuthi lokhu ipharamitha kuboniswa izindlu zedivayisi optical futhi ukuthi kusho. Thatha lens nge ezihleliwe Ubude ebalulekile Nikon sika, phezu komzimba okulotshiwe 85 mm. Le lebula kusho ukuthi idivaysi nokuqhelelana esimisiwe 85 kwangu. Ngokwesibonelo, ukuthatha lens yesibili variable ibanga ebalulekile Tamron. Ngomzimba wayo esiqokiwe 28-200 mm. Ngaphansi kwale lebula kwakusho ukuthi ubude ebalulekile kohlelo optical ingase ihluke 28 200 mm.

Njalo photographer professional ngokuvamile has iqoqo lens ezimboze edingekayo ibanga ibanga. Lokhu kwenza kube nokwenzeka ukuba amboze zonke izimo ezingase ziphakame ngesikhatsi kokuhlinzwa. Ngo kit enjalo ngokuvamile kuhlanganisa amadivayisi optical nge nemingcele ezilandelayo: 14 kuya ku-24 mm, kusukela 24 kuya 70 mm, kusukela ngo-70 kuya ku-200 mm, kusukela kwezingu-200 mm kuya ku-400 mm.

You azi ukuthi, ngaphezu engela umbono, ubude ebalulekile sithinta izithombe ngombono. Ngakho ngamazinga angefani nenkundla kuncike enezithombe kuzoba ezihlukahlukene ezithombeni. Telephoto uhlelo optical akugcini isihloko, kodwa futhi isikhala phambi nangemuva isihloko focus. Kabanzi-angle ithuluzi ezomhlaba phezu Usayizi izithombe lwazo zonke izinto. Futhi, ubude ezahlukene ebalulekile kuthinte Blur ngemuva.

Ekuphetheni, sithi nje ngokuchaza uhla oyifunayo, kungenzeka ukukhetha lens afanele. Ubude befokasi kakhulu kuthinta ukufiphala ukufiphala ndawo, kanye isithombe esizayo.