22/07/2025 8:53 am
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EF Mount Camera & Lens Forum
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Just got a Canon EOS 6D Mark II and need to pick up some reliable SD cards. I'll be shooting a mix of RAW photos and 1080p video, so I want something fast enough to handle the buffer without slowing me down. I've heard conflicting advice about whether UHS-I is sufficient or if I should invest in UHS-II cards for this camera. Also wondering about capacity - thinking 64GB or 128GB cards might be the sweet spot? What brands and specs have worked well for you 6D Mark II users? Any cards to avoid? Thanks!
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13/02/2026 1:50 am
Stumbled on this and wanted to add a technical perspective on the budget side. Quick tip: Buying UHS-II for this body is LITERALLY burning money. The 6DII hardware interface is limited to UHS-I (specifically the SDR104 bus speed), so you wont see any in-camera performance gains over a high-quality UHS-I card. To give you a better recommendation, how often are you actually hitting the burst buffer? Are you shooting high-action stuff or just mostly static portraits? That really dictates how much the buffer clearing time will actually matter for your workflow. TL;DR: Grab a SanDisk 128GB Extreme Pro UHS-I and call it a day. It is the best value for this spec. Honestly, for 1080p video and RAW stills, any card with a V30 rating is pretty much the gold standard for this camera. 128GB is definitely the sweet spot for price-per-gigabyte right now without risking too much data on a single massive card. Avoid the ultra-cheap no-name brands; they usually fail the sustained write tests required for video.
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25/07/2025 4:08 am
The Canon EOS 6D Mark II supports UHS-I SD cards. https://www.bhphotovideo.com/c/search?Ntt=UHS-I+SD+card&BI=8941&KBID=10361&SID=12345&DFF=d50
