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从性能与本质皆可靠的新一代高端 SD 卡, Sony SF-G Tough SD 卡动手玩

Sony 日前在台湾推出强调提供极致效能与可靠的 SF-G " TOUGH " SD 卡,除了延续 SF-G 系列的高性能表现之外,外壳采用全新的封装设计,标榜比过往的 SD 卡更坚固、可靠且不易断裂,为专业消费者在性能与产品可靠性能够两全其美,而这次也针对 TOUGH SD 卡进行快速的动手玩。

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在 SD 卡推出多年以来,虽然效能持续提升,但记忆卡本身的机构可靠性却未随之提升,受限于早期的规范, SD 卡多由包括正、反面与防写入开关共三片零件构成外壳,在结构需要预留防写开关的凹槽,并需要设计补强肋提升卡片强度。

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同时加上多数 SD 卡使用的 ABS 材料强度受限,在经过一段时间使用可能因为各种因素导致外壳脆化,不少 SD 卡并非内部组件毁损,而是由于材质老化导致外壳在插拔时损坏导致无法使用,像笔者也有一张不到一年的大厂记忆卡就因为防写开关上方龟裂导致相机无法侦测,幸好并未影响读卡机的读取,还可先将资料备份后换新,但万一外壳毁损到连内部资料都无法读取就得不偿失了。

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或许对多数的消费者而言,因为记忆卡机构毁损导致档案消失的意外不见可大可小,不过对于专业摄影师而言,这种事情是绝对不允许发生的,虽然不少专业相机都设有双记忆卡槽,但仍有部分准专业机维持单卡槽,同时也不是所有的摄影师都会将双卡槽设定为同步写入,若考虑到职业需要,尽可能降低档案毁损与遗失的风险远比所谓的 CP 值更重要。

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Sony 也看到专业市场的需求,思索专业使用者对于记忆卡的需求,重新规划记忆卡的机构,设计出 TOUGH SD 卡的单片式外壳机构,以全新的制程搭配比 ABS 更具强度与韧性 Epoxy 环氧树脂材质,并在取消防写开关后,以一体式的技术构成全新的外壳,同时递交给 SD 卡协会并成为认定的结构设计。

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以本质来说, TOUGH SD 卡的性能就是先前所推出的 SF-G 系列的 SDXC 卡表现,也就是当前 Sony 最高性能的 SD 卡水准,具备理论 300MBps 的读取与 299 MBps 写入,符合包括 V90 、 U3 与 SDHC II 等规范,也由于符合 SDHC II 规范,可再搭配支持此规范的相机与读卡机发挥最高水准。另外正面的标签使用鲜艳的黄色,强化在昏暗环境的识别度。

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TOUGH SD 卡除了在搭配专业相机进行大量 RAW 档案拍摄、高速连拍或是 4K HDR 录影能够提供更好的可靠与持续写入外,在搭配 Sony MRW-S1 高速 SD 卡读卡机,与搭配 USB 3.1 Gen.1 以上的电脑插槽,亦可在短时间将大量的档案储存至电脑内,可藉此提升工作效率;透过测速软件,可看到实际的读取速度约落在 280MBps 以上(不过最高有机会达理论速度),写入则多落在 260MBps 的水准。

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此次也由 Sony 提供了当家高画质旗舰机 A7R3 与 FE 24-70mm F2.8 GM 供搭配,毕竟以笔者个人使用的相机系统并未支持 SDXC II ,加上连拍与录影也未用到高流量,单纯考虑性能是用不到 TOUGH SD 卡的性能的。

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除了稳定的连续拍摄与录影写入外,重点在于把照片传送到电脑的时间相当快,等同 1GB 的照片仅需要 5 秒左右就可完成传输,尤其在如专业工作或是拍摄大量旅游照片后,可省却漫长的等待时间,尤其若是如 A9 开启高速连拍后产生的大量档案,使用 TOUGH SD 卡更能确保高速连拍的写入表现以及事后把档案传到储存设备的效率。

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然而 TOUGH SD 卡更重要的还是记忆卡本身的可靠度的提升,毕竟 SD 卡造成毁损不外乎内部的电子元件与外壳受损,在全新的单片式外壳机构设计之下,进一步降低 SD 卡外壳受损的机会,作为主要的工作记忆卡也能更为放心。

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不过毕竟 TOUGH SD 卡仍属 Sony 最顶级的记忆卡规格,对于未有高速读写需求的消费者仍会觉得单价较高,但实际上也是维持先前同级 SF-G 记忆卡的价位;不过既然 TOUGH SD 卡的外壳设计已经获得 SD 协会核可成为标准,能预期 Sony 接下来有机会陆续将 TOUGH SD 卡的单片式结构导入更主流的 SF-M 系列等,为摄影爱好者提供更可靠的新一代记忆卡。

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