Best Memory Card for Canon EOS 7D Mark II
The Canon EOS 7D Mark II remains a legendary workhorse for sports and wildlife photographers, largely thanks to its blistering 10fps burst rate. However, that speed creates a massive data bottleneck if you aren’t using the right media. Since this camera features dual slots—one CF and one SD—choosing the right combination is critical for clearing the buffer quickly. I’ve tested dozens of cards in this body, and the SanDisk Extreme Pro CompactFlash is consistently the most reliable performer for high-action sequences.
Our Top Picks at a Glance
Best Memory Cards for Canon EOS 7D Mark II: Detailed Reviews
SanDisk Extreme Pro CompactFlash View on Amazon View on B&H
If you are shooting a 7D Mark II, you likely bought it for the 10 frames-per-second burst rate. To actually maintain that speed without the buffer locking up after two seconds, you need a UDMA 7 rated CompactFlash card. The SanDisk Extreme Pro is the gold standard here. With write speeds up to 150MB/s, it maximizes the camera’s older but capable internal bus. In my experience, this card allows for significantly longer RAW bursts compared to standard SD cards. It’s ruggedly built to withstand the same harsh environments the weather-sealed 7D II is designed for. The only downside is that CompactFlash technology is becoming a legacy format, making these cards a bit more expensive per gigabyte than modern SD cards. However, for the primary slot in this specific camera, nothing else provides the same level of consistency and data integrity during high-pressure shoots.
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Lexar Professional 1066x CompactFlash View on Amazon View on B&H
The Lexar Professional 1066x is a fantastic alternative for photographers who want SanDisk-level performance without the “brand tax.” It fully supports the UDMA 7 protocol, which is the fastest speed the 7D Mark II can utilize in its CF slot. When I’m out in the field, I’ve noticed very little difference in buffer recovery times between this and the top-tier SanDisk. It handles 1080p video recording at 60fps effortlessly, and the card’s durability is well-regarded among professionals. One of the best perks of buying Lexar is the inclusion of a downloadable Image Rescue software, which provides peace of mind if you accidentally format a card. While some users have reported minor quality control variances over the years, the current 1066x line is stable and offers the best performance-to-price ratio for the 7D II’s primary slot. It is the smartest way to keep your camera’s burst mode humming.
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SanDisk Extreme PRO SDXC UHS-I View on Amazon View on B&H
The 7D Mark II has two slots, but only the SD slot supports the widely available SDXC cards. However, there’s a catch: the camera’s SD slot is only UHS-I compatible. This means that while you can use expensive UHS-II cards, you won’t get any speed benefit in-camera. That’s why the SanDisk Extreme PRO UHS-I is the perfect budget-friendly pick. It’s incredibly cheap, reliable, and more than fast enough for the 7D II’s SD bus limitations. I use this primarily in the second slot for JPEG backups or as an overflow for when my CF card fills up. It’s also great for video work, as its V30 rating guarantees a minimum sustained write speed that exceeds what 1080p video requires. If you are a casual hobbyist who doesn’t lean heavily on the 10fps burst mode, you could use this as your primary card, though you will definitely notice a slower buffer clearing compared to CF.
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SanDisk Extreme Pro 256GB CompactFlash View on Amazon View on B&H
For professionals shooting full-day events or long wildlife expeditions, the 256GB version of the SanDisk Extreme Pro is the ultimate “set it and forget it” option. When you’re shooting RAW at 10fps, you can burn through 32GB in a matter of minutes. I’ve found that having this high-capacity card prevents that frantic mid-action card swap that often leads to missed shots. It maintains the same 160MB/s read and 150MB/s write speeds as its smaller siblings, ensuring the 7D Mark II’s buffer clears as fast as technically possible. It’s also VPG-65 certified, which is a professional standard for video that ensures a sustained write speed of 65MB/s, making it overkill (in a good way) for the 7D II’s HD video. It’s a significant investment, but for anyone who treats their photography as a business or a serious passion, the reliability and cavernous space are well worth the price tag.
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Kingston Canvas Go! Plus SDXC View on Amazon View on B&H
The Kingston Canvas Go! Plus is an underrated gem that works beautifully in the 7D Mark II’s secondary SD slot. While Kingston might not have the same immediate name recognition as SanDisk in the photography world, their “Go! Plus” series is surprisingly robust. It’s rated for 170MB/s read and 90MB/s write, though again, the 7D II will cap that write speed significantly. What I like about this card is its thermal durability; it’s designed for action cameras and drones, so it handles the heat generated during long 1080/60p video recording sessions better than some generic cards. It’s a great “backup” card to keep in your bag. If you find your CF card is full, you can switch to this SD card and continue shooting without worrying about dropped frames or data corruption. It’s a solid, blue-collar card that does exactly what it says on the tin.
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Buying Guide: How to Choose a Memory Card for the 7D Mark II
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| SanDisk Extreme Pro CF | High-Action Sports | ★★★★★ | Check |
| Lexar Professional 1066x | Daily Pro Use | ★★★★☆ | Check |
| SanDisk Extreme PRO SD | Budget/Secondary | ★★★★☆ | Check |
| SanDisk 256GB CF | Long Assignments | ★★★★★ | Check |
| Kingston Canvas Go! Plus | Video Recording | ★★★★☆ | Check |
Frequently Asked Questions
Does the Canon 7D Mark II support UHS-II SD cards?
Yes, you can physically insert and use a UHS-II SD card in the 7D Mark II, but you won’t see any speed benefits. The camera’s internal hardware is only designed for the UHS-I bus. This means a UHS-II card will “throttle down” to UHS-I speeds (usually around 95MB/s max). Save your money and buy high-quality UHS-I cards instead, or invest that extra cash into a faster CompactFlash card.
Can I record to both card slots simultaneously?
Absolutely, and this is one of the best features of the 7D Mark II. You can configure the camera to “Rec. separately,” where RAW files go to the CF card and JPEGs go to the SD card, or “Rec. to multiple,” where both cards get the exact same files for instant backup. Just keep in mind that the camera will only write as fast as the slowest card in the pair.
What is the maximum card capacity the 7D II can handle?
The Canon 7D Mark II has been tested to work reliably with CompactFlash and SDXC cards up to 512GB. While the manual was written when smaller cards were the norm, modern firmware updates have ensured compatibility with higher capacities. However, many pros prefer using multiple 64GB or 128GB cards to minimize the risk of losing an entire day’s work if a single card fails or is lost.
Why is my buffer filling up so quickly even with a fast card?
There are two likely culprits. First, ensure you are using a UDMA 7 rated CompactFlash card, as standard CF cards are much slower. Second, check your camera settings. Features like “Lens Aberration Correction” or “High ISO Noise Reduction” require the processor to do extra work before writing the file to the card, which can slow down your effective burst rate and fill the buffer faster.
Is CompactFlash technology dead?
While CompactFlash is no longer being used in new camera releases (having been replaced by CFexpress), it is far from dead for users of classic DSLRs like the 7D II. Manufacturers like SanDisk and Lexar still produce these cards because so many professional bodies still rely on them. They remain incredibly durable due to their thicker housing, though they are more prone to bent pins in the camera slot if handled roughly.
Final Verdict
For the serious sports or wildlife photographer, the SanDisk Extreme Pro CF is the only logical choice to keep the 7D Mark II’s 10fps burst mode running smoothly. If you’re looking to save a bit of cash without sacrificing speed, the Lexar 1066x is a stellar alternative. For those who mostly shoot landscapes or casual portraits, a high-quality SD card like the SanDisk Extreme Pro UHS-I in the second slot will serve you well without breaking the bank.