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Quick answer: Both are body-only full-frame mirrorless cameras. The Sony Alpha a7 III is about $1,498; the Canon EOS R8 Mark II is about $1,899.
This comparison is built from the product listings on Amazon and manufacturer information, not our own testing. Prices were as listed on Amazon.com on October 30, 2026, converted where needed, and change. Confirm details on the product pages.
By the Reviewstook Editorial Team. Last updated: October 31, 2026.
At a Glance
| Feature | Sony a7 III | Canon R8 II |
|---|---|---|
| What the listing says | A Sony Alpha a7 III full-frame mirrorless camera body in black, per the listing (no lens included). | A Canon EOS R8 Mark II mirrorless camera body, per the listing (no lens included). |
| Approximate price (Oct 30, 2026) | About $1,498 | About $1,899 |
| Best for | enthusiasts who want a full-frame body | a newer Canon full-frame body |
| Strengths | full-frame sensor and large E-mount lens range | Canon RF mount ecosystem |
| Weaknesses | body only; price near $1,500 | body only; price near $1,900 |
Key Differences
System
The Sony uses E-mount with a large lens range. The Canon uses RF mount.
Age
The a7 III is older; the R8 Mark II is newer.
Price
The Canon costs about $401 more, and neither includes a lens.
Strengths and Weaknesses in Detail
Sony a7 III
Best for enthusiasts who want a full-frame body. Its main strengths, per the listing, are full-frame sensor and large E-mount lens range. The main weakness we found is body only; price near $1,500.
Canon R8 II
Best for a newer Canon full-frame body. Its main strengths, per the listing, are canon RF mount ecosystem. The main weakness we found is body only; price near $1,900.
Who Should Skip Each
- Skip the Sony a7 III if you want a kit with a lens.
- Skip the Canon R8 II if you want a kit with a lens.
How to Decide Between Them
Count the whole system, not only the body: body-only listings need lenses, cards and batteries. Check the lens mount and the range of lenses you can afford, then compare sensor size, autofocus and video features. A body is easier to change later than a collection of lenses.
Which Should You Choose?
Choose the Sony a7 III if
you want a proven full-frame body with a wide lens range.
Choose the Canon R8 II if
you prefer Canon and want a newer body.
Before You Buy
- Remember that body-only listings need a lens.
- Check the lens mount and lens availability.
- Budget for cards, batteries and a bag.
- Check the warranty and the seller.
Frequently Asked Questions
Which is cheaper, the Sony a7 III or the Canon R8 II?
In the listings we checked, the Sony a7 III was the cheaper one at about $1,498, against about $1,899 for the Canon R8 II. Prices change, so confirm on Amazon.
Do I need lenses?
Yes. Both are body-only listings.
Can I return it if it does not suit me?
Check the return window and the seller on the Amazon page before you buy, and keep the packaging while you test.
Bottom Line
Choose the Sony a7 III if you want a proven full-frame body with a wide lens range. Choose the Canon R8 II if you prefer Canon and want a newer body. Treat this as a way to narrow your choice, then confirm the details that matter to you on the product pages.
