A cikin daukar hoto da na gani, matattara mai tsaka tsaki ko ND tace matattara ce da ke rage ko canza ƙarfin duk tsayin raƙuman ruwa ko launuka na haske daidai ba tare da canza launin haifuwar launi ba. Manufar daidaitattun masu tacewa masu tsaka tsaki na daukar hoto shine don rage adadin hasken da ke shiga ruwan tabarau. Yin hakan yana ba mai ɗaukar hoto damar zaɓar haɗin buɗe ido, lokacin fallasa, da ji na firikwensin wanda in ba haka ba zai samar da hoton da ya wuce gona da iri. Ana yin wannan don cimma sakamako kamar zurfin filin ko motsin abubuwa a cikin yanayi mai faɗi da yanayin yanayi.
Misali, mutum na iya so ya harba magudanar ruwa a jinkirin saurin rufewa don ƙirƙirar tasirin blur motsi na niyya. Mai daukar hoto na iya ƙayyade cewa ana buƙatar saurin rufewa na daƙiƙa goma don cimma tasirin da ake so. A rana mai haske sosai, ana iya samun haske mai yawa, kuma ko da a mafi ƙarancin saurin fim da ƙaramin buɗe ido, saurin rufewa na daƙiƙa 10 zai ba da haske da yawa kuma hoton zai yi yawa. A wannan yanayin, yin amfani da tace mai tsaka tsaki mai dacewa daidai yake da tsayawa ɗaya ko fiye da ƙarin tasha, yana ba da izinin saurin rufewa a hankali da tasirin blur motsi da ake so.
Fitar tsaka-tsakin tsaka-tsaki da aka kammala, wanda kuma aka sani da ND filter, tsaga-tsaki-yawan tacewa, ko tacewa kawai, tacewa na gani wanda ke da watsa haske mai canzawa. Wannan yana da amfani lokacin da yanki ɗaya na hoton ya kasance mai haske kuma sauran ba haka ba ne, kamar yadda yake a cikin hoton faɗuwar rana.Tsarin wannan tacewa shine ƙananan rabin ruwan tabarau yana bayyane, kuma a hankali yana canzawa zuwa sama zuwa wasu sautunan, irin wannan. a matsayin gradient launin toka, gradient blue, gradient ja, da dai sauransu. Ana iya raba shi zuwa gradient launi tace da gradient diffuse tace. Daga mahangar sigar gradient, ana iya raba shi zuwa gradient mai laushi da mai wuya. "Laushi" yana nufin cewa kewayon miƙa mulki yana da girma, kuma akasin haka. . Ana yawan amfani da tace gradient a cikin ɗaukar hoto mai faɗi. Manufarsa ita ce da gangan don sanya ɓangaren sama na hoto ya cimma wani sautin launi da ake sa ran baya ga tabbatar da sautin launi na al'ada na ƙananan ɓangaren hoto.
Ana amfani da filtata masu tsaka-tsaki mai launin toka, wanda kuma aka sani da GND filters, waɗanda ke da rabin haske mai watsawa da rabin toshe haske, suna toshe ɓangaren hasken da ke shiga cikin ruwan tabarau, ana amfani da su sosai. Ana amfani da shi musamman don samun daidaitaccen haɗe-haɗe da kyamarori ke ba da izini a cikin zurfin zurfin ɗaukar hoto, ɗaukar hoto mai sauƙi, da yanayin haske mai ƙarfi. Hakanan ana amfani dashi sau da yawa don daidaita sautin. Ana amfani da matatar GND don daidaita bambanci tsakanin babba da ƙasa ko hagu da dama na allon. Ana amfani da shi sau da yawa don rage hasken sararin sama da kuma rage bambanci tsakanin sama da ƙasa. Bugu da ƙari don tabbatar da bayyanar al'ada na ƙananan ɓangaren, yana iya danne haske na sararin sama yadda ya kamata, yin sauye-sauye tsakanin haske da duhu mai laushi, kuma yana iya haskaka yanayin girgije. Akwai nau'ikan matattarar GND daban-daban, kuma launin toka shima ya bambanta. A hankali yana canzawa daga launin toka mai duhu zuwa mara launi. Yawancin lokaci, an yanke shawarar yin amfani da shi bayan auna bambancin allon. Bayyana bisa ga ma'auni na ɓangaren mara launi, kuma a yi wasu gyare-gyare idan ya cancanta.
Lokacin aikawa: Fabrairu-07-2023
