再創佳能經典85mm F1.2鏡頭傳奇
RF 85mm f/1.2L USM DS超大光圈人像鏡頭再創佳能經典85mm f/1.2人像鏡頭的傳奇,特別加入佳能最新光學技術-Defocus Smoothing (DS) 塗膜,完美配合f/1.2超大光圈,帶來與傳統不同的極致柔和散景。
EOS R • ISO 200 • 1/50s • f/1.2
DS (Defocus Smoothing) 塗膜光學技術


已應用DS塗膜的鏡片
RF 85mm f/1.2L USM DS特別加入佳能全新光學技術-DS (Defocus Smoothing) 塗膜。DS 塗膜是一種佳能獨有的氣相沉積 (Vapor-Deposited) 塗膜技術,可提供柔和而獨特的散景效果,令焦外散景的銳利邊緣變得更平滑柔和。當應用在鏡片表面時,塗膜結構可逐漸減低鏡片由中央至邊緣的透光率 (Light Transmittance) ,從而控制鏡頭進光量,藉此令焦外散景邊緣變得平滑柔和。在RF 85mm f/1.2L USM DS上,DS塗膜分別應用在光圈前、後的兩個位置,讓DS塗膜面對不同入射角度的光線都可發揮最佳效果,讓接近畫面邊緣的焦外散景亦可變得平滑柔和。
DS塗膜技術及效果比較
配備DS塗膜


透光率由鏡片由中央至邊緣逐漸減低,從而控制鏡頭進光量,藉此令焦外散景邊緣得以變得更平滑柔和。
沒有DS塗膜


整塊鏡片擁有均等的透光率,拍攝由光點變化成的散景邊緣會較為銳利。


EOS R • ISO 400 • 1/320s • f/1.2
最佳光學表現的佳能85mm人像鏡頭1
RF 85mm f/1.2L USM DS結合人像攝影師所有夢寐以求的元素。85mm乃專業人像攝影師愛用的黃金焦段,在相片呈現上既能為主體與背景之間提供自然和恰到好處的景深及透視感,同時讓攝影師與拍攝主體保持理想及有利於溝通的距離,此乃捕捉出色人像相片的一大關鍵。
RF 85mm f/1.2L USM DS充分發揮RF接環大口徑與短後對焦距離的優勢,採用與RF 85mm f/1.2L USM相同的9組13片光學設計及有效配置的「BR藍光譜折射光學鏡片」、玻璃研磨非球面鏡片及UD超低色散鏡片鏡片,令鏡頭於f/1.2最大光圈時提供佳能歷來85mm自動對焦可換鏡頭中最高的光學表現1。
EOS R • ISO 100 • 1/200s • f/1.2


BR鏡片
RF 85mm f/1.2L USM DS為第三支配備佳能獨有BR鏡片的鏡頭。BR鏡片中加入了為有效修正色差而設的有機光學物料 -「BR藍光譜折射光學元件」(Blue Spectrum Refractive Optics),具有能大幅度折射藍光(短波長光譜)的異常色散特性,當結合凹透鏡及凸透鏡時,能將不同顏色的光譜匯聚於同一個對焦點上,有效修正大光圈時傳統鏡片組合未能消除的軸向色差及色彩模糊,大大提升修正色邊效果,帶來更銳利細緻的高質素成像。
BR鏡片大幅修正色差




EOS R • ISO 100 • 1/8s • f/1.2


玻璃研磨非球面鏡片
鏡頭採用了1片高精度玻璃研磨(Ground)非球面鏡片,能減少球面像差及彗星像差,即使於f/1.2大光圈下畫面中心至邊緣均擁有超卓影像質素。


UD 鏡片
鏡頭亦加入1片UD超低色散鏡片﹐能有效消除軸向色差及倍率色差,達至高解像度及高反差的影像質素。


ASC空氣球體塗膜
鏡頭亦加入佳能獨有的ASC空氣球體塗膜,有效減少逆光拍攝時由反光引致的眩光及鬼影,從而提升畫面清晰度及對比度。
F1.2 超大光圈
鏡頭的f/1.2明亮超大光圈結合DS塗膜2及9片圓形光圈葉,能締造擁有極淺景深的夢幻柔和散景。即使全開光圈時﹐攝影師可透過EOS R系列相機的眼晴偵測自動對焦功能絲毫不差地對焦主體眼晴,加強相片感染力。超大光圈亦能確保優秀的低光拍攝表現,容許攝影師以更高速的快門捕捉清晰銳利的影像。此外, f/1.2超大光圈更可充分發揮EOS R系列無反相機「雙像素CMOS自動對焦」的低光自動對焦能力,不論任何嚴峻或光暗環境都能擴展拍攝可能性。


EOS R • ISO 100 • 1/160 s • f/1.2
高速自動對焦
為驅動f/1.2鏡頭的大型對焦鏡組,RF 85mm f/1.2L USM採用與超遠攝鏡頭同級的環型超聲波馬達,擁有冠絕佳能所有USM超聲波馬達的強大扭力;其操控方式亦經過改良,進一步加強最高輸出扭力,能更精準地驅動大型對焦鏡組,以助攝影師拍攝人像時快速準確地聚焦一瞬即逝的表情及重要時刻。鏡頭亦支援全時手動對焦,方便攝影師隨時按需要手動調校對焦效果,更精準細膩地聚焦眼神、傳達神態。
另外,RF 85mm f/1.2L USM支援0.85米最近對焦距離及0.12x最大放大率,讓攝影師能更接近主體拍攝,配合f/1.2超大光圈即能創造擁有迷人柔和散景、更具感染力的特寫作品。
EOS R • ISO 100 • 1/20 s • f/1.2
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