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Canon EOS R7
Canon · EOS R7 · Free lesson

Common fixes

What fixes the R7's known problems — 4K that won't record, adapted lenses, focus that won't track?

https://camerasdecoded.com/camera-select/canon/eos-r7/common-fixes.html
THE ANSWER
4K refuses or stops: low level format the card and meet the card spec — V60 for 4K 10-bit. An adapted lens that won't fire or stabilize: let the shutter release without a lens, then set its focal length. Focus that won't follow: Subject tracking itself must be On. And breathing has no correction on this body — know it before you hunt for it.
4K: Set-up → Format card → Low level format · V60 card for 4K 10-bit · Adapted lens: Custom Functions → Release shutter w/o lens → ON + IS mode → Focal length · Tracking: AF → Subject tracking → On · Breathing: no correction item on this body
Free lesson — the guided run walks every step.
FIX 1

4K stops — or never starts

MENU→Set-up→Format card

Work the checklist in order. Format: Canon’s manual says to low level format the card before 4K recording. Card speed: 4K at 10-bit (Canon Log or HDR PQ) needs a V60 card by Canon’s requirements; 8-bit asks for UHS Speed Class 3 — a slow card stops recordings or fails them outright. Heat closes the list: a hot camera offers less recording time.

FIX 2

It won’t fire — and it won’t steady

MENU→Custom Functions→Release shutter w/o lens

A manual or adapted lens with no electronic contacts fails twice: the shutter will not fire until Release shutter w/o lens is set to ON (Custom Functions tab), and the in-body stabilizer cannot work until [Focal length] is set to the lens’s length in IS (Image Stabilizer) mode. The manual ties them: with release-without-lens disabled, stabilization is prevented.

FIX 3

No tracking frame, ever

MENU→AF→Subject tracking

Subject to detect is set, Servo is on, and no tracking frame appears: the cause is Subject tracking itself. Set it to On. The manual states it twice — with Subject tracking off, no tracking frame is displayed regardless of the Subject to detect setting, and eyes are not detected either.

FIX 4

The honest answer: it isn’t here

MENU→Shooting→Lens aberration correction

Focus breathing — the frame pulsing at the edges as focus racks — is corrected on bigger Canons by a Focus breathing correction item. This body does not have it: Lens aberration correction here lists Peripheral Illumination, Distortion, Digital Lens Optimizer, Chromatic Aberration and Diffraction only. Manage breathing with lens choice, shorter focus throws, and cuts.

TRY IT NOW

Rehearse the fixes now: low level format the card you shoot 4K on, confirm Subject tracking is On, and find Release shutter w/o lens before an adapted lens surprises you in the field.