插槽1單通道插槽2雙通道

If you paid any attention to the launch of Canon and Nikon’s first full frame mirrorless cameras—the EOS R, Z6, and Z7— you’d have noticed that some people were pretty unhappy that they only came with a single card slot—an SD slot for the Canon and an XQD slot for the Nikons—instead of dual storage card slots. So, let’s find out what the big deal was.

如果您關注佳能和尼康首款全畫幅無反光鏡相機EOS R，Z6和Z7的發布，您會注意到有些人很不滿意它們只帶有一個卡槽-SD佳能的插槽和尼康的XQD插槽-而不是雙存儲卡插槽。 因此，讓我們找出有什么大不了的。

傳統上，專業相機和專業相機帶有兩個卡槽 (Professional and Prosumer Cameras Traditionally Come With Two Card Slots)

Canon and Nikon have traditionally included dual card slots in their prosumer and professional offerings. Typically, it was one SD card slot and one CF or other faster card slot but, as SD card speeds have picked up, that’s changed a bit. Sony’s top-end mirrorless cameras all use dual regular SD card slots.

佳能和尼康傳統上在其專業消費產品中包括雙卡插槽。 通常，它是一個SD卡插槽和一個CF或其他更快的卡插槽，但是，隨著SD卡速度的提高，情況有所改變。 索尼的高端無反光鏡相機均使用兩個常規SD卡插槽。

You can use dual slots in a few ways:

您可以通過以下幾種方式使用雙插槽：

• You can shoot RAW files to one card and JPEGs to another. That way, you have all the data, but you also have smaller photos you can quickly process on the go.

  您可以將RAW文件拍攝到一張卡上，將JPEG拍攝到另一張卡上。 這樣，您就擁有了所有數據，但是還擁有較小的照片，可以隨時隨地快速處理。

• You can shoot RAW files to both cards, giving you a perfect backup should anything happen to one card. This is the most popular use.
  您可以將RAW文件拍攝到兩張卡上，如果一張卡上發生任何事情，則可以為您提供完美的備份。 這是最流行的用法。
• You can shoot first to one card and then to the next which gives you more storage space. Since SD card prices have dropped, this is nowhere near as popular. Now, if people want more storage, they go with bigger cards.
  您可以先拍攝一張卡，然后拍攝下一張，從而為您提供更多的存儲空間。 由于SD卡的價格下降，因此普及程度不遠。 現在，如果人們想要更多的存儲空間，他們會選擇更大的存儲卡。

Shooting to dual card slots, however, has never been without its downsides. Since the camera had to write to two cards at the same time (and one was often slower), it could slow down the speed at which your camera could take multiple photos. It was wedding and landscape photographers for whom data integrity was more important than burst speed that used them; sports or wildlife photographers often couldn’t.

但是，向雙卡插槽射擊從來沒有缺點。 由于相機必須同時寫入兩張卡(并且通常要慢一些)，因此可能會減慢相機拍攝多張照片的速度。 對于婚禮和風景攝影師來說，數據完整性比使用突發速度更為重要。 體育或野生動物攝影師通常無法做到。

Nikon has seemingly addressed this with the Z6 and Z7: they’ve used a single XQD slot which is a faster standard than SD cards. This means the cameras can—at least theoretically for now—shoot faster bursts for longer and higher definition (and bit-depth) video. Canon’s decision to go with a single SD card slot is a little more questionable and was probably just motivated by wanting to save space inside their smaller camera body.

尼康似乎已經用Z6和Z7解決了這一問題：他們使用了單個XQD插槽，這是比SD卡更快的標準。 這意味著，至少從理論上講，攝像機可以為更快，更清晰(和位深度)的視頻拍攝更快的連拍。 佳能選擇使用單個SD卡插槽的決定有些疑問，這可能只是出于節省其較小的相機機身內空間的目的。

只有一個不安全的卡槽嗎？ (Is Having Only One Card Slot That Unsafe?)

All the uproar is predicated on two things:

所有的騷動都基于兩件事：

• That lots of people relied on dual card slots.
  很多人依賴雙卡插槽。
• That a single card slot is that much more unsafe than two.
  一個卡槽比兩個卡槽更不安全。

I suspect Canon and Nikon did their research and found that the vast majority of people buying their top end cameras weren’t using dual card slots, or at least weren’t relying on them. The amateur photography market dwarfs the professional market.

我懷疑佳能和尼康做了研究，發現絕大多數購買高端相機的人沒有使用雙卡插槽，或者至少不依賴它們。 業余攝影市場使專業市場相形見war。

The second issue is a little more thorny. Storage cards can and do fail. It’s easy to find horror stories of photographers losing amazing images that took a lot of time and money to create. It’s foolish to think SD cards are 100% reliable. However, the odds of you having a problem with your SD cards if you use high-quality cards and treat them well are tiny. It’s like a reverse lottery: someone will lose data but the odds of it being you are next to nothing.

第二個問題比較棘手。 存儲卡可能會也確實會失敗。 人們很容易發現恐怖的故事，即攝影師丟失了花費大量時間和金錢來制作的驚人圖像。 認為SD卡100％可靠是愚蠢的。 但是，如果您使用高質量的卡并妥善處理，則SD卡出現問題的幾率很小。 這就像是反向抽獎：有人會丟失數據，但有可能您幾乎沒有錢。

For people who need data security—wedding photographers are by far the biggest one since they’re paid thousands of dollars to capture someone’s big day—then dual card slots are a must and Canon, and Nikon’s decision is a nightmare. After all, wedding photographers are one of the biggest groups of professionals.

對于需要數據安全的人來說，婚禮攝影師是迄今為止最大的攝影師，因為他們付了數千美元來捕捉某人的大日子，那么雙卡插槽是必須的，佳能也是，尼康的決定是一場噩夢。 畢竟，婚禮攝影師是最大的專業人士群體之一。

For everyone else though, it’s probably not that big a deal. I shoot to dual card slots because it’s a good idea, but it’s not crucial to my workflow. With a single card slot I’d be running a bit more risk, but realistically, I’m more likely to lose images because my camera gets stolen than because an SD card fails.

對于其他所有人，這可能沒什么大不了的。 我拍攝雙卡插槽是因為這是個好主意，但這對我的工作流程并不重要。 如果使用單個卡插槽，則可能會冒更大的風險，但是實際上，我的相機丟失的原因可能是圖像丟失，而不是因為SD卡出現故障而丟失圖像。

And really, that’s the decision that everyone’s facing now. Canon and Nikon have decided that a single card slot is good enough and, for most people, it probably is. A few more photographers will lose images if they decide to go mirrorless but the vast majority won’t notice the change. Plus, Sony is still making cameras with dual card slots—and who knows, the uproar might be enough to get Canon and Nikon to add them back in the second generations.

實際上，這就是每個人現在面臨的決定。 佳能和尼康已經決定，一個卡槽就足夠了，對大多數人來說可能就足夠了。 如果再決定不使用反光鏡，還會有幾位攝影師丟失圖像，但是絕大多數攝影師不會注意到這種變化。 此外，索尼仍在制造具有雙卡槽的相機-誰知道，這場騷動可能足以讓佳能和尼康在第二代產品中重新添加它們。

翻譯自: https://www.howtogeek.com/392378/what’s-the-big-deal-about-dual-storage-card-slots-for-cameras/

插槽1單通道插槽2雙通道