Upgrade guide · updated 5 November 2026
Should I upgrade from the Sony Alpha A7R III to the Sony Alpha A7R IV?
Verdict
Upgrading is hard to justify for most people. Both use the Sony E / FE mount, so your lenses fit directly.
What you gain
- 61MP instead of 42MP
What you give up
- Nothing significant on paper
What it costs
| Alpha A7R IV new | No longer sold new |
| Alpha A7R IV used (MPB, typical) | £1,130 |
| Your Alpha A7R III trade-in (rough estimate) | ≈ £490 |
| Net cost buying used | ≈ £640 |
Trade-in estimates assume about two-thirds of the typical MPB resale price; real offers vary with condition and shutter count.
Specs side by side
Sony Alpha A7R III specs · Sony Alpha A7R IV specs · full comparison · best lenses for the Alpha A7R IV
Other upgrade paths
Frequently asked questions
Should I upgrade from the Sony Alpha A7R III to the Sony Alpha A7R IV?
The upgrade is hard to justify for most people. You gain 61MP instead of 42MP.
How much does it cost to upgrade from the Alpha A7R III to the Alpha A7R IV?
The Alpha A7R IV costs No longer sold new new and about £1,130 used at MPB. Trading in a used Alpha A7R III might bring roughly £490, so the net cost is around £640 buying used (a rough estimate: get quotes from MPB, Wex and Park Cameras).
Will my Alpha A7R III lenses work on the Alpha A7R IV?
Both use the Sony E / FE mount, so your lenses fit directly.