CFexpress Type A vs Type B: Which Card Fits Your Camera?

Quick answer

CFexpress Type A and Type B are different physical formats, so the deciding factor is your camera's card slot, not the speed printed on the label. Type A cards are smaller and fit compact bodies such as many Sony mirrorless models, while Type B cards are larger and appear in cameras from Nikon, Canon, and Panasonic. Check your manual or the slot door before buying, because a Type B card will not fit a Type A slot and vice versa.

The size difference that decides everything

Type A and Type B differ first in physical dimensions, and that difference is what limits compatibility. A Type B card is larger and will not seat in a Type A slot, while a Type A card is too small to make proper contact in a Type B slot. Some cameras label the slot with a small logo or the letters A or B, and others list the supported format in the spec sheet. If you are unsure, open the card door and compare the opening to the card you plan to buy, or check the manual's storage section.

This is also why a single card reader usually handles only one type. A Type A reader will not accept a Type B card, and a Type B reader will not accept a Type A card. If you shoot with both formats, plan for two readers or a dual-slot reader that explicitly lists both.

What the two formats are built for

Type B cards generally target higher sustained throughput, which suits high-resolution raw bursts and high-bitrate cinema capture. Type A cards prioritize a smaller footprint, which lets compact camera bodies keep a slim profile while still offering faster performance than older SD cards. The practical result is that Type B is common in larger hybrid and cinema-oriented bodies, while Type A is common in smaller full-frame and APS-C mirrorless cameras.

Do not assume a Type A card is slow just because it is small. The Delkin Devices 80GB Black CF Express Type A Memory Card, for example, is part of a lineup built for high-resolution raw images, continuous burst photography, and cinema-quality 8K, 6K, and 4K video at high frame rates and bitrates. That makes it a reasonable match for a compact camera that uses the Type A slot and needs reliable write speed for video.

How to confirm your camera's slot before you buy

Start with the camera body itself. Many manufacturers print the supported card type on the inside of the card door or next to the slot. If there is no label, search your camera model plus the word 'card slot' and read the official specification page rather than a forum post, since slot types can change between generations of the same camera line.

Next, confirm the reader. A card is only useful if you can offload it. If your computer has a built-in SD slot, you will still need a separate CFexpress reader for either type. Match the reader to the card type, not to the camera brand, because readers are format-specific.

XQD vs CFexpress: what changed

XQD was an earlier card format that shares a similar physical shape with CFexpress Type B, and some cameras that originally shipped with XQD support later gained CFexpress Type B compatibility through a firmware update. That history is why you sometimes see the two mentioned together. The safe approach is to check your specific camera model and firmware version before assuming a CFexpress Type B card will work in an XQD-era slot.

If your camera only supports XQD and has not received a CFexpress update, a CFexpress Type B card may not be recognized. In that case, stay with XQD cards or confirm the firmware requirement with the manufacturer.

Capacity and card count matter more than peak speed

For most shooters, running out of space mid-shoot is a bigger risk than a small speed difference between two cards of the same type. The Delkin Type A lineup is available in capacities ranging from 80GB to 960GB, which means you can choose a smaller card for a lightweight kit or a larger one for a full day of video. Buying two mid-size cards instead of one huge card also gives you a backup if one card fails.

Consider how you work. If you offload after every shoot, a smaller card is fine. If you travel and cannot offload daily, a larger card reduces the chance of stopping to manage storage.

Trade-offs at a glance

• Type A: smaller size, fewer camera options: Type A cards fit compact mirrorless bodies that use that slot, but the format is less widely adopted than Type B, so your choice of cameras and readers is narrower. Choose Type A only if your camera's slot requires it.
• Type B: wider adoption, larger footprint: Type B cards appear in more camera systems and generally target higher sustained throughput, but they will not fit a Type A slot and require a Type B reader. Choose Type B if your camera lists it and you need maximum compatibility across larger bodies.
• Reader mismatch: an easy and expensive mistake: A Type A reader will not accept a Type B card and vice versa, so buying the wrong reader leaves you unable to offload footage even if the card itself is correct. Buy the reader at the same time as the card and confirm the format on both.

Product facts

• Delkin Devices 80GB Black CF Express Type A Memory Card: The Delkin Devices BLACK CFexpress Type A lineup is available in capacities from 80GB to 960GB and is designed for high-resolution raw images, continuous burst photography, and cinema-quality 8K, 6K, and 4K video at high frame rates and bitrates. If your camera uses a Type A slot and you shoot raw bursts or high-bitrate video, this lineup covers both small and large capacity needs within the correct format.
• FUJIFILM instax mini Evo Cinema Hybrid Instant Camera: The FUJIFILM instax mini Evo Cinema Hybrid Instant Camera combines instant photography, short-form video capture, and wireless smartphone printing in a compact vertically styled body inspired by 1960s Super 8 film cameras. This camera is a useful reminder that not every camera uses CFexpress at all. If your camera is an instant or hybrid model like this one, CFexpress cards are not part of the workflow, so check your actual camera type before buying memory.

Which card is right for you?

Choose this if

• Your camera manual or card door specifies CFexpress Type A.
• You shoot with a compact mirrorless body and need a small card that still handles raw bursts and high-bitrate video.
• You want a capacity range from 80GB to 960GB within the Type A format.

Do not choose this if

• Your camera specifies CFexpress Type B or XQD, because a Type A card will not fit or make contact.
• You have not confirmed your camera's slot type, since guessing can result in a card that cannot be used.
• Your camera is an instant or hybrid model that does not use CFexpress cards at all.