Does an XQD slot automatically support CFexpress Type B?
Use an exact firmware example without extending it to every camera or reader.
The answer
Short answer No. The shape matches, but support depends on the camera’s firmware; Nikon, for example, added it to the D850 by update.
No. CFA documents shared dimensions and connector geometry between XQD and CFexpress Type B, but operation still depends on the exact equipment and firmware. Nikon’s D850 history documents Type B support added in the C 1.11 to 1.20 update; that camera-specific change does not establish support in every XQD camera or card reader.
Shared physical geometry is an identification clue, not an electrical, protocol or firmware verdict.
2Reasoning step
The cited Nikon D850 firmware page includes the historical C 1.11 → 1.20 change adding CFexpress Type B support. This is an exact-model example, not a general upgrade recipe.
3Reasoning step
A camera and a USB reader are different hosts. A card supported by a camera can still require a separately documented reader.
4Reasoning step
This reference does not select an approved card, install firmware, prove boot or recording modes, or verify an actual sample. Follow the manufacturer’s exact-model instructions for any update.
Keep geometry, firmware and the second host separate
Label or example
What is documented
What still needs checking
Evidence
XQD / CFexpress Type B
CFA identifies shared dimensions and connector geometry.
Exact-host support; a physical fit is not a compatibility result.
C122C (private workspace)
Nikon D850
The published C 1.11 → 1.20 history adds CFexpress Type B support.
The exact card, installed firmware and current manufacturer instructions.
C134B (private workspace)
Separate reader
The camera-specific firmware addition applies to the camera.
The reader’s own Type B support; no reader qualification is supplied by this Nikon notice.
C134B (private workspace)
Scroll horizontally on narrow screens. These are bounded references, not tested-card approvals, measured transfer rates or a complete licensed-standard extract.
What to check next
Confirm the full camera or reader model, not merely “XQD slot.”
Read the installed firmware and the model’s supported-card documentation.
Check the selected CFexpress Type B card and required camera recording mode.
Verify the separate reader and computer path before treating the camera’s support as an offload solution.
Question pages do not create compatibility verdicts.
They reorganize facts and uncertainty already represented in the atlas. Exact-device, cable, protocol, power, safety and performance requirements remain separate where the evidence says they are separate.
Page scope: Evidence attached to records and cable profiles referenced by this guide; not a sentence-by-sentence editorial approval.
Assessment 2026-10-22 · earliest scheduled source review 2027-01-01. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.
CompactFlash Association · Standards-organization domain · inspected 2026-10-03 · due 2027-01-01
Within inspection window
Scoped support: CF uses PATA; CFast uses SATA; CFexpress uses PCIe/NVMe; Type B and XQD share a form factor but camera support is conditional.
Not established / limitations: No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.
Locator: CFexpress Form Factors; Type A versus Type B; Legacy Standards
Sony · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01
Within inspection window
Scoped support: MRW-G1: CFexpress Type B and Sony XQD G- and M-series cards; USB 3.1 Gen 2 Type-C computer interface. Other XQD cards are not established by this scope.
Not established / limitations: Documentation-only family and port scope; no physical test, current stock or price check, measured performance, complete card list, or independent approval.
ProGrade Digital · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01
Within inspection window
Scoped support: PG05.5 dual-slot USB 3.2 Gen 2 reader: CFexpress Type B and SDXC UHS-II; XQD explicitly excluded. The publisher instructs users to eject through the operating system before removal.
Not established / limitations: Documentation-only family and port scope; no physical test, current stock or price check, measured performance, complete card list, or independent approval.
Locator: Product description; compatibility and eject notes
ProGrade Digital · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01
Within inspection window
Scoped support: PG05.7: CFexpress Type B and SDXC; XQD is explicitly excluded. The USB4 connection is outside the current generic USB-data handoff model.
Not established / limitations: Documentation-only family and port scope; no physical test, current stock or price check, measured performance, complete card list, or independent approval.
Locator: Product description and compatibility caveat
Scoped support: Exact D850 support addition for CFexpress Type B in C firmware 1.20.
Not established / limitations: No firmware file downloaded or installed; no exact-card list, recording-mode approval, current unit version or universal XQD conversion inferred.
Locator: English page for C firmware 1.31; Changes from C 1.11 to 1.20, and cumulative-update statement. Inspected 2026-10-08.
Sony · Unclassified publisher domain · inspected 2026-10-11 · due 2027-01-09
Within inspection window
Scoped support: Named reader support only, not all XQD readers, all camera slots or all brands.
Not established / limitations: Named example only. No universal compatibility or publication approval. Raw-byte acquisition status is recorded separately.
Locator: Product description and FAQ: supported Sony CFexpress Type B and Sony XQD G/M series cards.
Sony · Manufacturer / product-owner domain · inspected 2026-10-22 · due 2027-01-20
Within inspection window
Scoped support: Named Sony G-series card example QD-G120F: approximate whole-card dimensions and listed interfaces, not contact geometry.
Not established / limitations: Japanese table explicitly labels W/L/T and approximate values. No card contact count,pitch,slot fit,CFexpress interchangeability,reader support or data rate inferred from shared size. Product photo not treated as a labelled exact card model view.
Locator: CurrentQD-G240F/QD-G120F/QD-G64F/QD-G32E table: interface,outerdimensions(WxLxT),capacity; separate discontinued model table.
Trace 13 claims to their source records
C122A · P122
The CompactFlash Association states that Type B and XQD share a form factor and connector, with camera support conditional on implementation.
Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval
CFA describes CFexpress Type B as using two PCIe lanes and retaining the same dimensions and connector as XQD. It separately makes camera support conditional on implementation or a manufacturer update.
Claim scope: Card Types public text: form-factor footnote and A/B FAQ; no dimensions or speed table transcribed.
Nikon records CFexpress Type B support as a change from D850 C firmware 1.11 to 1.20. That is an exact-model firmware example, not proof that every XQD camera or reader can be upgraded.
Claim scope: D850 firmware page, Changes from C 1.11 to 1.20; no firmware installation or sample check.
Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.
