Existing evidence:C134A · C134B · C138A · C138B/ source records S096 · S437 · S106 · S107. See each source record for its inspection date and scope; graphic interpretation remains pending independent technical and publication review.
The useful distinction
Understand the requirement.
A shared form factor does not establish firmware or reader support; record the actual supported media formats for both devices. [C134A]
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. [C134B]
Bounded facts, visible unknowns
Specifications and limits
XQD versus CFexpress Type B: check support, not just fit facts and limitations
Documented identification
The CompactFlash Association states that Type B and XQD share a form factor; some cameras may add Type B support through implementation updates. [C134A]
Important distinction
The CompactFlash Association states that Type B and XQD share a form factor; some cameras may add Type B support through implementation updates. [C134A]
Documented distinction
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. [C134B]
Verified device list
Not included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.
Record the exact device model and the label beside the port. Obtain its manual and the accessory documentation. Keep unknown properties unknown instead of filling them from a visually similar item.
Before you connect
What to check
Record the camera model and installed firmware.
Find an explicit supported-media statement for that exact model.
Check the card reader independently of the camera.
This field note does not approve a connection, publish a pinout or provide a measured template. Use the linked source scope and the checklist as a documentation starting point.
AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.
C134ASource checked · pending review
The CompactFlash Association states that Type B and XQD share a form factor; some cameras may add Type B support through implementation updates.
Locator: CFexpress Form Factors; Type A versus Type B; Legacy Standards Access: public page. No copied tables, logos, numeric throughput promises, exhaustive market status or licensed normative specification. Text-only scope.
Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval. Next review due 2027-01-01.
C134BSource checked · pending review
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.
Locator: English page for C firmware 1.31; Changes from C 1.11 to 1.20, and cumulative-update statement. Inspected 2026-10-08. Access: public page. No firmware file downloaded or installed; no exact-card list, recording-mode approval, current unit version or universal XQD conversion inferred.
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
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.
Trace 2 claims to their source records
C134A · P134
The CompactFlash Association states that Type B and XQD share a form factor; some cameras may add Type B support through implementation updates.
Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval
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.
