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Liketso tsa Bohlokoa tsa Photoshop
Litlhoko tsa bana ba sa tsoa tsoaloa ™ Lesea le Fetohang Liketso tsa Photoshop Set
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Canon e na le lense e ncha e nang le patente e nang le li-optics tse hlakileng (DO) 'meleng oa 400mm f / 4 IS DO super telephoto lense, e ka lokolloang' marakeng haufinyane.
Mehloli e ts'epiloeng e senotse qalong ea 2014 hore ona e tla ba selemo sa Canon sa lilense, ho fana ka maikutlo a hore k'hamphani e tla phatlalatsa optics e ngata ho pholletsa le selemo.
Haele hantle, selemo ha sea qala ka mokhoa o ts'episang. Ebile, e bile ho soetseha ho felletseng ha lilense tsa pele li senotsoe feela bohareng ba Mots'eanong. EF-S 10-18mm f / 4.5-5.6 IS STM le EF 16-35mm f / 4L IS USM li ile tsa senoloa ka Mots'eanong 13, ha lense ea ho qetela ea k'hamphani ke EF-M 55-200mm f / 4.5 -6.3 KE STM.
Joalokaha ho boletsoe kaholimo, ke li-optics tse tharo feela tse ncha tse seng li le molaong ka 2014, leha re ntse re na le ts'episo ea hore re tla bona tse ling tse ngata ka Letsatsi la Selemo se Secha se tlang. Har'a tsona re kanna ra ba le lilense tse ncha tse tharo tse nang le li-optics tse fapaneng.
Ntle le ts'ebetso e 'ngoe, mofuta oa morao-rao oa DO o tla ba le patente ke k'hamphani e thehiloeng Japane ke lense ea Canon 400mm f / 4 IS DO, e latelang tse ling tse peli tsa DO optics tse patiloeng pejana ho 2014.
Canon 400mm f / 4 E ETSA patent ea lens e fumanoeng Japane
Mehloli naheng ea habo khamphani e fumane patent ea lense ea 400mm e nang le palo e kholo ea f / 4. Lense le eona e tla tlala theknoloji e hahelletsoeng ka hare ea sets'oants'o, e leng molemo haholo ha o sebetsana le mofuta o motle oa telephoto.
Mohlomong tlhaiso-leseling ea bohlokoa ke hore lense e na le karolo ea "diffractive optics" e ahelletsoeng. Kaho e kahare e na le likotoana tse 17 lihlopheng tse 12 'me e kenyelletsa karolo ea fluorite.
Ho eketsoa ha likarolo tse ngata tsa DO ho tla fokotsa boholo le boima ba lense, ha ho ntse ho ntlafatsa boleng ba setšoantšo ka ho fokotsa haholo phetoho ea chromatic.
Lilense tse ling tse peli tsa Canon DO li entsoe ka molao haufinyane
Canon ha e rekise lilense tse ngata tse thehiloeng ho DO. 70-300mm f / 4.5-5.6 DO IS USM le 400mm f / 4 DO IS USM ke mefuta e teng bakeng sa ho reka hona joale.
Joalokaha u bona, ea morao-rao e kanna ea nkeloa sebaka ke mofuta o mocha, leha ho sa hlaka hore na hobaneng e lahlehetsoe ke ultrasonic autofocus motor (USM).
Ho bohlokoa ho supa hore li-DO tse neng li na le tokelo ea ho etsa tokelo ea pele li ne li kenyelletsa 70-300mm f / 4.5-5.6 DO IS USM, e tla nkela mofuta oa hajoale. Keketso ea boraro letotong la DO e tla ba lense ea 100-400mm f / 4.5-5.6 DO, ho latela litokelo tse phatlalalitsoeng haufinyane.
Re ka lebella hore li-Optics tsena li hlahise reng e ikhethang e tala ho bona. Leha ho le joalo, ena e ntse e le menyenyetsi feela ka hona re tla tlameha ho emela tlhaiso-leseling e ngata hobane re etsa qeto ea hore ehlile ba tla 'marakeng haufinyane.