Canon EOS R5 Mark II vs Sony a6400: Which Mirrorless Fits?
By The Camera Exchange | Published: 2026-11-03
Category: Comparisons
Compare the Canon EOS R5 Mark II and Sony a6400 on price, format, and rental flexibility to decide which mirrorless body fits your shooting needs and budget.
Quick answer
Choose the Canon EOS R5 Mark II if you need a full-frame body and can justify the higher cost; choose the Sony a6400 if you want an affordable APS-C camera for video and everyday shooting. Both are available at The Camera Exchange with a price guarantee and rental option.
Price and format trade-off
The Canon EOS R5 Mark II is a full-frame mirrorless camera listed at $2,859.35 (compared to $4,399.00), while the Sony a6400 is an APS-C model at $435.47 (compared to $649.95). That price gap reflects the different sensor sizes and market positions. Full-frame cameras like the R5 Mark II generally offer better low-light performance and shallower depth of field, but they cost more and require compatible full-frame lenses. APS-C cameras like the a6400 are more compact and affordable, with a 1.5x crop factor that extends your effective focal length—useful for reach but a limitation for wide-angle work.
Rental as a risk-free test
Both cameras are available to rent from The Camera Exchange. Renting lets you try the full-frame R5 Mark II or the APS-C a6400 in your own workflow before committing to a purchase. This is especially valuable if you are unsure whether the size and weight of a full-frame system suit your shooting style, or if you want to test the a6400's video capabilities for your specific projects.
Key trade-offs to weigh
- Sensor size and low light: The R5 Mark II's full-frame sensor generally performs better in low light and offers shallower depth of field; the a6400's APS-C sensor is smaller, so you may see more noise in dim conditions. If you often shoot indoors or at dusk, the full-frame advantage may justify the higher cost.
- Lens ecosystem and cost: Full-frame lenses for the R5 Mark II are typically larger, heavier, and more expensive than APS-C lenses for the a6400. Factor in the total system cost, not just the body. Add up your likely lens purchases before deciding; the cheaper body may not mean a cheaper system.
- Video and crop factor: The a6400's APS-C crop factor (about 1.5x) gives extra reach for telephoto video, but it narrows wide-angle shots. The R5 Mark II's full-frame sensor preserves wide angles without a crop. If you shoot wide-angle video, the full-frame R5 Mark II avoids the crop; if you need reach, the a6400 may be more convenient.
- Rental before buying: Both cameras can be rented from The Camera Exchange. Rent the one you are leaning toward for a weekend shoot to confirm it feels right in your hands and fits your workflow. Renting first can prevent a costly mistake, especially with the higher-priced R5 Mark II.
Product facts
- Canon EOS R5 Mark II Mirrorless Camera: Full-frame mirrorless camera priced at $2,859.35 (compared to $4,399.00), with price guarantee and rent now. The full-frame sensor suits low-light and shallow depth-of-field work, but the higher price means you should budget for full-frame lenses.
Canon EOS R5 Mark II Mirrorless Camera - Sony a6400 Mirrorless Camera: APS-C mirrorless camera priced at $435.47 (compared to $649.95), with price guarantee and rent now. The lower price and crop factor make it a budget-friendly option for video and telephoto reach, though wide-angle framing is limited.
Sony a6400 Mirrorless Camera
Who should choose which
Best for
- Photographers who need full-frame low-light performance and shallow depth of field
- Video shooters who want wide-angle framing without a crop factor
- Users who can budget for full-frame lenses and accessories
Not for
- Budget-conscious buyers who want a capable camera under $500
- Travelers who prefer a lighter, more compact APS-C system
- Anyone who mainly needs extra telephoto reach for video
