Yes, the Canon EOS R3 works with the DJI RS 4 — with conditions (see below).
Canon EOS R3 body weighs approximately 1015g (with battery and memory card, including the integrated vertical grip, per Canon specifications). Paired with a Canon RF 24-105mm f/4 L IS USM lens (approximately 700g) -- a versatile full-frame zoom for professional work -- combined weight is approximately 1715g. This is well within DJI RS 4's stated 3kg (6.6lbs) payload capacity per DJI's own product page.
Conditions for compatibility
Verdict assumes a Canon RF 24-105mm f/4 L IS USM lens (approximately 700g, per Canon lens specifications). EOS R3 body (~1015g, with battery and memory card) + this lens = approximately 1715g total. Heavier telephoto lenses will increase this total -- check your specific lens weight against the gimbal's 3kg payload limit before buying.
“Canon RF 24-105mm F4L IS USM lens weight approx. 700g (per Canon's published lens specifications).”
“Body (including battery and CFexpress card) Based on CIPA guidelines. Approx. 1015 g Approx. 35.80 oz.”
“3kg (6.6lbs) Payload Capacity With Extended Tilt Axis”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)