Sele kulixesha elide ikhamera RED yokugqibela yavela eCineD HQ, kodwa nantsi kwakhona, ngeRED V-RAPTOR 8K VV ezandleni zethu. Ndingathanda ukuyivavanya kwiimvavanyo zethu zaselebhu eziqhelekileyo. Kwakhona unomdla? Emva koko funda kwi...
Abafundi abaninzi basibuze ukuba sinethuba lokuvavanya ikhamera yeRED V-RAPTOR 8K kwilebhu yethu, ngakumbi emva kokuba sivavanye i-ARRI ALEXA 35 entsha (uvavanyo lwelebhu apha).
I-RED V-RAPTOR ine-specs emangalisayo ene-35.4MP (40.96 x 21.60mm) i-sensor ye-CMOS yefreyimu epheleleyo, i-8K@120fps kunye nebango le-17+ lokumisa uluhlu oluguquguqukayo.
Kuvakala kumangalisa, kodwa njengoko sonke sisazi, akukho mgangatho umiselweyo wokuvavanya uluhlu oluguquguqukayo lwemifanekiso ehambayo (jonga inqaku lethu kunye nendlela esenza ngayo apha) - ngoko ke senze uvavanyo oluqhelekileyo lwelebhu yeCineD ukuze singazi ukuba uthini umenzi. !
Ke, masiyiqonde-kuyavakala ukufunda inqaku ngaphambi kokuba ubukele ividiyo, kodwa oku kukuwe.
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Ngaphambi kokuqala, sivumela ikhamera ukuba ifudumale imizuzu engama-20, emva koko umthunzi (ulinganise) inzwa kunye ne-lens cap ivaliwe (i-firmware yangoku yekhamera yi-1.2.7). Njengesiqhelo, ugxa wam endimthandayo uFlorian Milz waphinda wandinceda kolu vavanyo lwaselebhu – enkosi!
Ukusebenzisa indlela yethu yokulinganisa i-shutter esemgangathweni kunye ne-strobes yethu, sifumana i-8ms eqinile (ngaphantsi ingcono) kwi-full-frame 8K 17: 9 ukufundwa kwe-DCI. Oku kulindelekile, kungenjalo i-120fps kwi-8K ayinakwenzeka. Esi sesinye seziphumo ezilungileyo kakhulu esizivavanyileyo, kuphela i-Sony VENICE 2 ine-shutter ephantsi ye-3ms (umzekelo, i-ARRI ALEXA Mini LF ine-7.4ms, ihlolwe apha).
Kwimowudi ye-6K Super 35, ixesha lokuvala i-rolling liyancipha ukuya kwi-6ms, ikuvumela ukuba udubule kwi-160fps kwesi sigqibo. Ezi zixabiso zeklasi yokuqala.
Njengesiqhelo, sisebenzise itshathi yeDSC Labs Xyla 21 ukuvavanya uluhlu oluguquguqukayo. I-RED V-RAPTOR ayinayo i-ISO yendalo echaziweyo, I-REDCODE RAW ISO inokumiselwa ukuba ithunyelwe.
Ngoku inokuba uyazibuza ukuba kuqhubeka ntoni apha? Kutheni ndingaqalisi ukubala izitishi njengesiqhelo ndingahoyi isikhululo sesibini ukusuka ekhohlo? Ewe, indawo yesibini ukusuka ekhohlo yakhiwa ngokutsha kwiitshaneli ze-RGB ezichotshiweyo, ezithi "UkuBuyisa okuPhambili" okwakhelwe kumbhobho weRED IPP2 ngokuzenzekelayo.
Ukuba ukwandisa iziteshi ze-RGB ze-waveform, unokubona okwenzekayo - isigxina sesibini (esiboniswe sisangqa esibomvu) asibonisi naluphi na ulwazi lombala we-RGB.
Kuphela isikhululo sesithathu ukusuka ekhohlo esinazo zonke iitshaneli ze-RGB ezi-3, kodwa itshaneli ebomvu sele ikwi-cliping threshold. Ke ngoko, sibala izitophu zoluhlu oluguquguqukayo ukusuka kwisiqwenga sesithathu.
Ke ngenkqubo yethu esemgangathweni (njengazo zonke iikhamera) sinokunyuka siye malunga ne-13 zokumisa ngaphezulu kwenqanaba lengxolo. Esi sisiphumo esihle kakhulu - xa kuthelekiswa ne-ARRI ALEXA Mini LF (uvavanyo ngelebhu apha) linyathelo elilodwa kuphela eliphezulu (i-ALEXA 35 ngamanyathelo ama-3 aphezulu). Ezona khamera zinefreyimu epheleleyo yabathengi zihlala zineendawo zokumisa ezimalunga ne-12 ukuze zibone yonke into.
Ngoku, unokuba uyazibuza ukuba kutheni ndingakhange ndibale oku kumisa “kubuyiswa”? Impendulo kukuba ayinalo lonke ulwazi lombala. Iimpembelelo apha zicacile ukuba uskrolela ezantsi kwiziphumo zesibanzi.
Ukujonga kwi IMATEST ubalo, oku kuqaqambisa okungagqibekanga kugqwesa iziphumo kuba i-IMATEST iphinda ibale iindawo zokumisa ezinganqunyulwanga kodwa zibuyiselwe. Ngaloo ndlela, i-IMATEST ibonisa i-13.4 imisa kwi-SNR = i-2 kunye ne-14.9 imisa kwi-SNR = 1.
Okufanayo kusebenza kwi-4K ProRes 4444 XQ epheleleyo. Okuthakazelisayo kakhulu, iziphumo ze-IMATEST kwi-ISO800 zifana kakhulu: i-13.4 imisa kwi-SNR = 2 kunye ne-14.7 imisa kwi-SNR = 1. Ndandilindele ukuhla kwikhamera ukuphucula iziphumo zoluhlu oluguquguqukayo.
Ukuqinisekiswa komnqamlezo, ndiphinde ndehlise i-8K R3D ukuya kwi-4K kwi-DaVinci Resolve 18, kwaye apha ndifumene amaxabiso angcono kakhulu: i-13.7 imisa kwi-SNR = 2 kunye ne-15.1 yokumisa kwi-SNR = 1.
Ibenchmark yethu yangoku yoluhlu olupheleleyo oluguquguqukayo lwesakhelo yi-ARRI ALEXA Mini LF ene-13.5 yokumisa kwi-SNR = 2 kunye ne-14.7 yokumisa kwi-SNR = 1 ngaphandle kokubuyisela kwakhona. I-ARRI ALEXA 35 (i-Super 35 sensor) iphumelele i-15.1 kunye ne-16.3 imisa kwi-SNR = 2 kunye ne-1 ngokulandelanayo (kwakhona ngaphandle kokubuyisela ukukhanya).
Ukujonga iifom zamaza kunye neziphumo ezi-IMATEST, ndicinga ukuba i-RED V-RAPTOR ine-1 yokumisa uluhlu oluguquguqukayo ngakumbi kuneyona khamera ibalaseleyo yabathengi. I-ALEXA Mini LF ine-1 yokumisa uluhlu olunamandla ngakumbi kune-RED V-RAPTOR, ngelixa i-ALEXA 35 ine-3 yokuyeka ngaphezulu.
Inqaku elisecaleni: Ngeekhamera zeBlackmagic kwi-BRAW, unokukhetha ukhetho "UkuBuyisa kwakhona" kwisithuba (kwiDaVinci Resolve). Kutshanje ndileqa uvavanyo nge-BMPCC 6K yam kwaye apha "UkuBuyiselwa kwakhona okuPhakamisayo" ukhetho lubangele inqaku le-IMATEST malunga nokumisa oku-1 phezulu nge-SNR=2 kunye ne-SNR=1 kunokuba ngaphandle kwe-HLR.
Kwakhona, yonke into yadutshulwa kwi-REDCODE RAW HQ kwi-ISO 800 usebenzisa i-DaVinci Resolve (i-Full Res Premium) izicwangciso zophuhliso eziboniswe ngasentla.
Ubude bubuchule bekhamera bokugcina iinkcukacha kunye nombala xa utyhileke ngokugqithisileyo okanye ungatyhilekanga kwaye ubuyele kwisiseko sesichengeni. Ngexesha elidlulileyo, sakhetha ixabiso elikhanyayo elikhanyayo le-60% (kwi-waveform) yobuso bento (ngokuchanekileyo, ibunzi) kwindawo eqhelekileyo yestudio. Oku kubonakaliswa kweCineD kusisiseko kufuneka kuncede abafundi bethu bafumane inqaku lereferensi kuzo zonke iikhamera ezivavanyiweyo, nokuba bawabela njani amaxabiso ekhowudi okanye basebenzisa yiphi imowudi yeLOG. Kuyathakazelisa kakhulu ukuba i-ALEXA Mini LF i-symmetrical malunga nesiseko sokubhekisela kwixabiso lexabiso le-60% (i-latitude ye-5 imisa ngaphezulu kunye ne-5 yokumisa ngaphantsi kweli nqaku).
Kwi-V-RAPTOR, i-60% yokukhanya ukuseta sele kushushu, kwaye kukho ikhefu eli-2 elongezelelweyo kwizinto eziphambili ngaphambi kokuba isitishi esibomvu kwibunzi likaNino endimthandayo siqale ukukliphu:
Ukuba sonyusa utyhileko olungaphaya kolu luhlu, siya kubetha ngqo indawo yokumisa ukwakhiwa kwakhona (esisikhululo sesibini ukusuka ekhohlo kwindlela yamaza ngaphezulu):
Uyabona kumfanekiso ongentla ukuba yonke ingcaciso yombala kwibunzi likaNino (kunye nobuso) ilahlekile, kodwa ezinye iinkcukacha zomfanekiso zisabonakala-yiloo nto ebonisa ukubuyiswa kwakhona.
Oku kuhle kuba igcina iinkcukacha kwiifoto ezivezwe kakhulu ukuya kumlinganiselo othile. Unokuyichonga ngokulula ngezixhobo ze-RED zokuvezwa kwezibane zendlela njengoko zibonisa amaxabiso oluvo lwe-RAW.
Kulo mzekelo ungentla, ukuba ukuvezwa kunyuswe ngaphezu kwe-2 yokuyeka umfanekiso ogqithisiweyo, izibane ze-RED ziza kubonisa ukuba ishaneli ebomvu iqala ukunqunyulwa (njengesiginali ye-RGB).
Ngoku makhe sijonge ukungatyhileki. Ngokulahla i-aperture ezantsi ukuya ku-f/8 kwaye emva koko wehlise i-engile yesivalo ukuya kuma-90, 45, 22.5 degrees (njl) sifumana umfanekiso omhle kakhulu nococekileyo onezithintelo ezi-6 kuphela zokungatyhileki (ngezantsi kwesiseko sethu) ingxolo enzulu:
Sibethe iindawo ezisi-8 ze-exposure latitude, eyona nto sinokuyifumana kwikhamera yabathengi egcwele isakhelo. Ewe, i-Sony VENICE 2 ibethe umda wesisombululo sendabuko se-8.6K (usebenzisa i-codec ye-X-OCN XT). Ngendlela, ukuza kuthi ga ngoku ikhamera yomthengi kuphela enokusondela kwii-9 zokumisa yi-FUJIFILM X-H2S.
Ukunciphisa ingxolo kusawugcina lo mfanekiso, nangona siphela sinombala omdaka-pinki oqinileyo (okungekho lula ukuwususa):
Sele sikumanqanaba ali-9 e-latitude yesityhilelo! Ikhamera yesakhelo esipheleleyo esipheleleyo ukuza kuthi ga ngoku, i-ALEXA Mini LF ibetha i-10 eqinile. Ke makhe sibone ukuba singayifezekisa na le nto nge-RED V-RAPTOR:
Ngoku, ngokunciphisa ingxolo enamandla, sinokubona ukuba umfanekiso uqala ukuhlukana - sifumana umbala oqinileyo kakhulu, kwaye kwiindawo ezimnyama zomfanekiso, zonke iinkcukacha zitshatyalalisiwe:
Nangona kunjalo, isabonakala ilungile ngokumangalisayo, ngakumbi kuba ingxolo isasazwe kancinci kakhulu - kodwa zigwebe ngokwakho.
Oku kusizisa kwisiphelo: indawo eqinileyo ye-9-stop exposure latitude enegumbi lokushukuma ukuya kwi-10 yokumisa.
Ngokubhekiselele kwireferensi ye-latitude yangoku, i-ARRI ALEXA 35 ibonisa i-12 stops of exposure latitude kwindawo yethu ye-studio ye-CineD eqhelekileyo - i-3 iyayeka ngaphezulu, enokuthi ibonakale kwiifom zekhamera kunye neziphumo ze-IMATEST (nazi iimvavanyo zelebhu).
I-RED V-RAPTOR ayipheleli nje ekunikezeni umsebenzi oncomekayo, ikwabonakalise ukusebenza okuphezulu kwilebhu yethu. Amaxabiso e-rolling shutter yeyona nto ilungileyo (ikhuselekile kwinkokeli yeqela i-Sony VENICE 2), uluhlu oluguquguqukayo kunye neziphumo ze-latitude zinamandla, malunga nokumisa oku-1 ukusuka kwi-ARRI Alexa Mini LF-ikhamera yethu ye-cinema yereferensi epheleleyo ukuza kuthi ga ngoku.
Ngaba ukhe wadubula nge-RED V-RAPTOR? Athini amava akho? Sazise iingcinga zakho kwicandelo lamagqabaza apha ngezantsi!
Ungazikhupha nanini na ngokusebenzisa ikhonkco lokungabhalisi elibandakanyiweyo kwincwadana yeendaba nganye. Ngolwazi oluthe kratya, nceda ubone uMgaqo-nkqubo wethu waBucala
Ngaba uyafuna ukufumana uhlaziyo rhoqo lweCineD kwiindaba, uphononongo, njani-tos, kunye nokunye? Bhalisa kwincwadana yethu kwaye siya kukunceda.
Ungazikhupha nanini na ngokusebenzisa ikhonkco lokungabhalisi elibandakanyiweyo kwincwadana yeendaba nganye. Idatha enikeziweyo kunye nezibalo zokuvula i-newsletter ziya kugcinwa ngokusekelwe kwidatha yomntu de ube ukhupha. Ngolwazi oluthe kratya, nceda ubone uMgaqo-nkqubo wethu waBucala
Ndithabathekile ngamathuba amatsha eekhamera ezixineneyo. Ayingomdubuli onomdla ophila ngokwenza oko. Ndibambe amazinyo malunga nothotho lwePanasonic GH, bendihlala ndifuna ukugcina izixhobo zam zincinci kangangoko ndinakho ngexesha lokuhamba kwam kwihlabathi apho ndenze khona ukubalisa ibali lefilimu njengento yokuzonwabisa.
Ngaba uyafuna ukufumana uhlaziyo rhoqo lweCineD kwiindaba, uphononongo, njani-tos, kunye nokunye? Bhalisa kwincwadana yethu kwaye siya kukunceda.
Ungazikhupha nanini na ngokusebenzisa ikhonkco lokungabhalisi elibandakanyiweyo kwincwadana yeendaba nganye. Idatha enikeziweyo kunye nezibalo zokuvula i-newsletter ziya kugcinwa ngokusekelwe kwidatha yomntu de ube ukhupha. Ngolwazi oluthe kratya, nceda ubone uMgaqo-nkqubo wethu waBucala
Zikhuphe kubhaliso ngekhonkco kwincwadana yeendaba. Ibandakanya izibalo ezigciniweyo ude uyeke ukubhalisa. Jonga uMgaqo-nkqubo waBucala ngeenkcukacha.
Ixesha lokuposa: Dec-13-2022