Main trade-off
Canon EOS R7 body
Body only,612g before the lens. Duplicate recording is mode-dependent and can stop when either card fills.
Head-to-head
Canon EOS R7 vs Sony a6700: R7 makes a second card copy, Sony adds 4K120 in a lighter body
The short answer
R7 makes a second card copy in supported modes, while Sony adds 4K120 in a lighter body. Choose R7 when immediate card duplication or existing Canon crop lenses are central to the purchase. Choose a6700 when its 119g lighter body or 4K120 solves the more frequent job, particularly with E lenses you already own. Both links are body-only. R7’s two slots need the right mode and free space, while a6700’s high-speed video adds crop and media requirements.
Before you choose
The reasoning and the trade-offs
The second card changes the plan for an event with no repeat
If you are the only person recording a family ceremony, R7 can create two card copies in supported modes. a6700 has one slot. R7’s benefit is immediate duplication, provided both cards have space and the selected mode permits it. It is not the same as automatically moving to a second card when the first fills. Canon also warns that movie auto-switch stops the take at a full card and needs recording restarted. For uninterrupted coverage, capacity planning remains essential. Choose R7 when the second copy is a hard requirement, then verify the exact recording mode rather than assuming any two-card setup supplies it.
What this is based on
Canon duplication versus overflow behavior and movie interruption, Sony single slot. Distinguishes redundancy from uninterrupted duration. No claim special RAW-burst modes support duplication.
Main trade-off
Sony a6700 body
Body only with one SD slot. 4K120 narrows the view and has no internal proxy recording.
Canon EOS R7 body
- Choose it for
- You need supported duplicate recording at an important event, or want to retain compatible RF-S or adapted EF-S lenses.
- You accept the 612g body before the lens and prefer to keep the Canon setup rather than rebuild around another mount.
- Main trade-off
- Body only,612g before the lens. Duplicate recording is mode-dependent and can stop when either card fills.
Sony a6700 body
- Choose it for
- A lighter body helps the complete carry setup, or 4K120 is a recurring requirement with its crop and card limits accepted.
- You already own compatible E lenses and can manage the single-card recording and later backup workflow.
- Main trade-off
- Body only with one SD slot. 4K120 narrows the view and has no internal proxy recording.
About this comparison
R7 vs a6700 for family sport, long outings and events you cannot repeat. Compare duplicate recording, complete lens weight and the 4K slow-motion workflow.
Both are higher-end APS-C bodies with stabilization and monitored audio, aimed at people who want one interchangeable-lens camera for stills and video. The meaningful trade is capture redundancy and Canon lens continuity versus Sony’s lighter body and 4K120.
Winner by situation
Start with what you need it to do
A second card copy during a supported event mode is essential
Only R7 has two card slots.
- Canon EOS R7 body
- Better fit
- Sony a6700 body
- Not suitable
Retain compatible Canon crop lenses
R7 keeps that lens system with the appropriate adapter where needed.
- Canon EOS R7 body
- Better fit
- Sony a6700 body
- Caution
Need 120p recording that retains 4K
Sony supports 4K120 with additional crop and media requirements.
- Canon EOS R7 body
- Not suitable
- Sony a6700 body
- Better fit
Minimize body weight before choosing the lens
a6700 is 119g lighter on the same battery/card basis.
- Canon EOS R7 body
- Caution
- Sony a6700 body
- Better fit
What matters in practice
The differences that matter
The second card changes the plan for an event with no repeat
If you are the only person recording a family ceremony, R7 can create two card copies in supported modes. a6700 has one slot. R7’s benefit is immediate duplication, provided both cards have space and the selected mode permits it. It is not the same as automatically moving to a second card when the first fills. Canon also warns that movie auto-switch stops the take at a full card and needs recording restarted. For uninterrupted coverage, capacity planning remains essential. Choose R7 when the second copy is a hard requirement, then verify the exact recording mode rather than assuming any two-card setup supplies it.
How we reached this conclusion
Canon duplication versus overflow behavior and movie interruption, Sony single slot. Distinguishes redundancy from uninterrupted duration. No claim special RAW-burst modes support duplication.
A lighter body only helps if the complete lens setup stays lighter
a6700 is 119g lighter with battery and card included. That is relevant to a long zoo visit or a day carrying both camera and children’s supplies, but it is not a complete-system weight comparison. A useful Canon lens already owned may let you keep R7’s setup simple, while replacing it with a different Sony lens can change the total. Both links are body-only, so compare the lens range and actual accessories for the same outing before deciding. A wrist or handling limitation also deserves a physical grip check. The weight difference alone does not establish comfort or suitability for a disability.
How we reached this conclusion
612−493=119g using manufacturer body-plus-battery/card figures. Lens and accessories excluded equally. No unverified complete-kit or medical comfort claim.
The high-speed clip may need a wider lens and another editing step
For a close sideline or small indoor sports area, a6700’s 4K120 crop can make it harder to keep the whole movement in frame from a fixed position. A suitable wider lens may be needed even if the ordinary-speed view looked fine. Sony also disables internal 120p proxies, so a computer that relies on them may need to generate its own copies after transfer. R7’s 4K60 gives less slowdown at a common playback rate, but that can be enough for the clip you intend to share. Choose Sony when the additional slow motion earns those costs. Neither camera’s maximum frame rate proves better autofocus or distortion-free motion.
How we reached this conclusion
Sony documented narrower 120p view and absent internal proxies, Canon 4K60 inventory. Fixed shooting position and proxy-dependent editing are explicit assumptions. No measured sports accuracy claim.
Choice A
Canon, 5137C002
Canon EOS R7 body
You need supported duplicate recording at an important event, or want to retain compatible RF-S or adapted EF-S lenses.
- Best matched use
- You need supported duplicate recording at an important event, or want to retain compatible RF-S or adapted EF-S lenses.
Checked facts
- Copies during capture: Two SD slots, eligible duplication
- 4K action recording: Up to 59.94p
- Body with battery and card: 612g
- Existing lens path: RF/RF-S, qualified EF/EF-S via adapter
Choice B
Sony, ILCE6700/B
Sony a6700 body
A lighter body helps the complete carry setup, or 4K120 is a recurring requirement with its crop and card limits accepted.
- Best matched use
- A lighter body helps the complete carry setup, or 4K120 is a recurring requirement with its crop and card limits accepted.
Checked facts
- Copies during capture: One SD slot
- 4K action recording: Up to 119.88p with crop
- Body with battery and card: 493g
- Existing lens path: Sony E
Meaningful differences
What changes the fit
| What changes | Canon EOS R7 body | Sony a6700 body | Why it matters |
|---|---|---|---|
| Copies during capture | Two SD slots, eligible duplication | One SD slot | R7 offers an immediate copy path the Sony body does not. |
| 4K action recording | Up to 59.94p | Up to 119.88p with crop | Sony supports more slowdown while retaining 4K. |
| Body with battery and card | 612g | 493g | Sony saves 119g before lens and accessories. |
| Existing lens path | RF/RF-S, qualified EF/EF-S via adapter | Sony E | Retaining a useful lens can matter more than the body difference. |
| Handheld and audio support | Body stabilization, mic and headphones | Body stabilization, mic and headphones | These shared capabilities do not decide the pair by themselves. |
What you give up
Every choice has a cost
If you choose Canon EOS R7 body
- Two cards only make two copies when the chosen mode supports duplication and the camera is configured correctly.
If you choose Sony a6700 body
- The 119g body saving can disappear if the lens or support equipment needed for the same job is heavier.
Recommendation switch
The decision flips if...
Capture duplication or the Canon lens collection is decisive
Choose Canon EOS R7 body. R7 protects that recording or ownership requirement.
4K120 or the lighter Sony body solves the actual outing
Choose Sony a6700 body. a6700 earns the choice with the complete lens and editing plan checked.
What matters in practice
Before you choose
You want to capture the decisive moment, carry the camera all day and still have a usable recording when you get home.
What this comparison cannot tell you
- No measured autofocus, rolling-shutter or image-noise ranking.
- Both cameras still need an off-camera backup after an important event.
What the facts say
What the comparison shows
Useful conclusions from the current mirrorless cameras comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Canon EOS R7 body |
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| Sony a6700 body |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Canon EOS R7 body
You need supported duplicate recording at an important event, or want to retain compatible RF-S or adapted EF-S lenses.
You accept the 612g body before the lens and prefer to keep the Canon setup rather than rebuild around another mount.
See price & reviews on AmazonSony a6700 body
A lighter body helps the complete carry setup, or 4K120 is a recurring requirement with its crop and card limits accepted.
You already own compatible E lenses and can manage the single-card recording and later backup workflow.
See price & reviews on AmazonLinks open in a new tab.