- Write speed matters more than capacity once a card is big enough to hold your shoot
- CFexpress is built for high-resolution stills and video that SD cards can’t keep up with
- Redundancy — shooting to two cards at once — is standard practice, not paranoia
- A dead battery loses a shot just as fast as a dead card does
The two things that end a shoot faster than anything else when they run out — and the two things photographers most reliably under-budget for.
Why Card Speed Matters More Than Capacity
A bigger card just means more room. Speed is what actually affects whether the camera keeps up with you. Shoot RAW bursts or high-bitrate video onto a slow card and the buffer fills, the camera stalls, and the decisive moment happens while it’s still writing the last one. Cards are rated by both a speed class and a real-world write speed — the number that actually matters is the sustained write speed, not the marketing badge on the packaging.
SD Cards
SD cards, especially the faster UHS-II versions, cover the vast majority of mirrorless and DSLR bodies on the market. They’re the right choice for most everyday photography — travel, portraits, general shooting — where burst speed and 8K video bitrates aren’t pushing the format’s limits.
CFexpress Cards
CFexpress cards are newer, considerably faster, and increasingly what high-end bodies require to hit their fastest burst rates and highest-bitrate video codecs. Wildlife and sports photographers shooting long bursts at high frame rates lean on them to avoid the buffer ever filling, and cinema cameras recording internal raw footage often need them just to keep up with the data rate.
CompactFlash Cards
Older CompactFlash cards still show up in some established professional workflows and older camera bodies still in active use, though the format is steadily being phased out in favor of CFexpress. Whatever the format, buying from a known brand isn’t snobbery here — counterfeit cards are common and they fail in exactly the moment you can’t afford it.
Redundancy Is Not Optional
Cards fail. Not often, but often enough that any paid shoot deserves a camera with dual card slots set to record a backup copy simultaneously. It’s the cheapest insurance policy in the entire kit, and the only people who skip it on a wedding or paid client shoot are the ones who haven’t lost a card yet.
Batteries and Grips
Proprietary lithium-ion batteries are the norm now, and third-party versions are hit or miss on both safety and actual capacity — worth researching before trusting one on a paid job. A battery grip attaches to the bottom of the body, holds a second battery for roughly double the shooting time, and usually adds a vertical shutter release, which matters a lot to anyone shooting a full day of portrait-orientation event or wedding work. For anything longer than a couple hours, carrying at least one spare battery isn’t optional, it’s just planning.
Related Tools & Guides
- SmallRig Power & Battery Accessories: A Buying Guide — NP-F adapter plates and power bank adapters for longer runtime between charges.