Sony 全幅無反系統第三世代基準,專業機能與親民價格的 Sony A7 III

2018.03.27 12:09PM
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Sony 在今年 CP+ 展會發表第三世代無反光鏡全片幅的基準機種 A7 III ,也是今年展會的大熱門機種,針對這款鎖定攝影愛好者、繼承高階機精華的親民機種也在今天宣布於 4 月 3 日上市,開出單機身 59,980 的價格,搭配 28-70mm 組合為 64,980 元。

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Sony 的全片幅機身已經邁入第三世代,不同於多數品牌在機身設計、感光元件與電子系統都賦予不同的差異化, Sony 以相近的機身,在感光元件、電子機能設定做為差異化,看起來像是異卵三胞胎的設計卻有截然不同的定位與特色。

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A7 III 採用與 A9 、 A7R III 相同的新式框體,具備相同的新操作介面(同樣拿掉對 PlayMemories 支援)、焦點撥桿,雙記憶卡插槽,當然還有新式的 Z 電池,續航力達到系列頂峰的 710 張。

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另外電子觀景窗雖解析度與 A7 II 相同為 236 萬畫素,但搭配新式的光學系統,放大率與 A9 、 A7R III 看齊,同時可開啟 120fps 高速更新,大幅改善觀景窗使用體驗,此外後方的 LCD 也支援觸控操作。

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雖然 A7 III 畫素與 A7 II 帳面上都是 24MP ,不過 A7 III 並非沿用先前的元件,而是導入背照式結構的 Exmor R 元件技術,同時搭配最佳化的 Bionz X 引擎,最高可擴充到 256,000 ,在高 ISO 的表現也比起 A7 II 表現更佳。

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對焦系統沿用 A9 與 A7R III 的 693 點、 93% 對焦系統與對焦性能,對有高速對焦、追焦需求,或是在構圖上有特殊需要也有更好的彈性,此外強化瞳孔追焦,提供 10fps 靜音連拍與最高連續寫入 177 張的表現,不過若在暗部對焦表現仍不及具超高 ISO 的 A7s ,為 -3EV ,當前 A7 家族中僅有 A7S 系列達到 -4EV 。

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至於機身防手振則相較 A7 II 提升半級達到 5 級,至於未達 A7R III 的水準則是因為畫素密度與產品定位進行差異化設計,只有 24MP 的 A7 III 對於手振有較高的容忍度,但反之 42MP 的 A7R III 只要有手振就很容易反應在影像上。

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另外在錄影方面也獲得大幅度的升級, A7 III 的 4K 採用 6K 非像素合併非裁切輸出,並可支援 HDR 、 14 檔動態範圍與 S-Log 2/3 ,作為 4K 錄影使用也有一定的可靠性。

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除了 A7 III 以外, Sony 也一併介紹新一代高階閃燈 HVL-F60RM ,這款閃燈繼承 Sony 獨特的左右 90 度擺頭設計,同時將熱靴換成更可靠的金屬材料,可提供 GN60 的最大亮度,並且改善結構材質降低連續觸發發熱,對於高速連續拍攝有更好的可靠性。

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同時 HVL-F60RM 可支援無線觸發系統,能夠將最多 15 隻閃燈配到 5 群做為無線觸發,最大範圍可達 30 公尺;另對於有高速回電需求的專業攝影師,可選配外接電池提高連續觸發速度,可縮減至 0.6 秒。目前 HVL-F60RM 與周邊還未確定上市時間與價格。

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