The Canon 6D Mark II uses SDXC, SDHC, and SD memory cards. In order to get the most performance out of your camera, make sure to use a card with UHS-I.
Cards that can be used with the 6D mkII include any SD card with a capacity of up to 2TB. Bear in mind that SD cards without UHS-I will be slower, which may negatively impact the camera's capabilities.
Just want a compatible card? Here's my recommendation for the best memory card:
16 GB or 32 GB cards are inexpensive and large enough for photos.
64GB or larger cards are a better choice for video.
Best SD Cards
SanDisk, Lexar, and PNY are manufacturers that produce high-quality Memory cards. The best memory cards I have used have been the SanDisk Extreme Pro cards.
That does not mean you need to purchase a card from SanDisk for your Canon 6D Mark II. Just make sure the name is impressive. That will mean you get fast read/write speeds, shock resistance, and other professional features.
I have not run into errors with Lexar Professional or PNY Elite Performance cards.
When I have experienced problems with cards has been when I have used cheap no-name brands. Being cheap increases the possibility of card failure or corrupted data.
If you are looking to spend less, don't buy a generic card. You will be better off purchasing a name brand memory card with a smaller storage capacity.
Recommended SD Cards
SanDisk Extreme Pro 128GB SD Card
- Best value for the money.
- Capacities from 32 GB to 2TB.
- Transfer speeds up to 170 MB/s.
- Class 10 & UHS-I
- Temperature Proof, Water Proof, Shock Proof, and X-ray Proof.
- Lower priced card.
- Transfer speeds up to 95 MB/s.
- Class 10 & UHS-I.
- Magnet Proof, Shock Proof, Temperature Proof, Waterproof.
- Lexar Professional Silver Card.
- Transfer speeds up to 160 MB/s.
- Class 10 & UHS-I.
- Includes Lexar Recovery Tool Software.
- Designed for durability in harsh conditions.
Canon 6D Mark II SD Card Compatibility
SD, SDHC, and SDXC cards are compatible with the Canon 6D mkII. Use a UHS-I card to get the best performance from the camera.
Four different specifications of Secure Digital (SD) cards have been made. New card specifications add tech that provides for larger storage capacity and faster transfer rates.
- Secure Digital (SD) - 128MB to 2GB.
- Secure Digital High Capacity (SDHC) - 4GB to 32GB.
- Secure Digital eXtended Capacity (SDXC) - 64GB to 2TB.
- Secure Digital Ultra Capacity (SDUC) - 4TB to 128TB.
Here is an estimation of how many large JPEGs you can expect to fit on a card:
- 4GB - 1,160 images
- 8GB - 2,320 images
- 16GB - 4,640 images
- 32GB - 9,280 images
Speed, Class, & UHS Ratings
The speed rating of an SD card is based on sequential write and read speeds. The speed of a card is essential for continuous shooting and video.
A slow SD card can cause a drop in the number of continuous frames the Canon 6D Mark II can take. This is because the camera's buffer will not be able to write data to the SD card fast enough.
When recording video, a slow memory card can cause the recording to end. The video file could also end up being corrupted. If you intend to record video, it is essential the card you use meets the minimum requirements of the camera.
Read speed is nice to have for transferring files to a computer or laptop. If you have cards that are full, an SD card with a fast read speed will decrease the transfer time.
Speed Class Rating
The Class rating of an SD card is based on the sustained write speed. SD cards that have a minimum write speed of at least 10MB/s get rated as Class 10.
- Class 2 - 2MB/s
- Class 4 - 4MB/s
- Class 6 - 6MB/s
- Class 8 - 8MB/s
- Class 10 - 10MB/s or faster
Every name-brand SD card that you can find for sale online will have a Class 10 rating. You can check the class rating of a card by looking for a number inside of a C on the label.
Ultra High Speed (UHS)
The Ultra High Speed (UHS) bus can be found in SDXC And SDHC cards. UHS allows cards to achieve faster transfer rates.
There are 3 different specs. They are UHS-I, UHS-II, and UHS-III.
Look at the label to figure out the rating of a card. If the SD card has UHS a roman numeral I, II, or III will be on the label.
- UHS-I - Maximum transfer rate of 104 MB/s
- UHS-II - Maximum transfer rate of 312 MB/s
- UHS-III - Maximum transfer rate of 624 MB/s
Now that you what specs the camera needs you can see why the SanDisk 64GB Extreme Pro is the best Canon 6D Mark II memory card. This will also help you find an SD card for your future cameras.
Here are more pages on cameras related to the 6D mkII: