Sony A7 III vs Sony A7 IV
Side-by-side used price and spec comparison. Lowest current prices pulled daily from the major used-gear sites.
Used prices have been rising recently. Prices are up 26.0% over the last 30 days. The 90-day low was $600, $199 below today. Currently 40% of the $1,999 MSRP.
Today's price sits well above the recent low. Today's price runs 109% above the 90-day low of $675 (seen Sep 10, 2026). 56% of the $2,499 MSRP. Prices are down 7.9% over the last 30 days.
Quick answers
- Which is cheaper used, the Sony A7 III or the Sony A7 IV?
- The Sony A7 III is cheaper used: $799 against $1,409 for the Sony A7 IV, a gap of $610 (76%) as of 2026-10-28.
- How much more does the newer Sony A7 IV cost used?
- $610 more. The Sony A7 IV (2021) starts at $1,409 used and the Sony A7 III (2018) at $799 as of 2026-10-28.
- What share of its launch price does a used Sony A7 III cost?
- About 40%: $799 used against a $1,999 launch price as of 2026-10-28.
Specs side by side
| Sony A7 III | Sony A7 IV | |
|---|---|---|
| Brand | Sony | Sony |
| Family | Sony Alpha | Sony Alpha |
| Category | body | body |
| Body type | Mirrorless | Mirrorless |
| Mount | Sony FE | Sony FE |
| Sensor | Full Frame | Full Frame |
| Sensor family | Sony FF 24MP BSI (A7 III/A7C) · 24.2MP full-frame Exmor R BSI CMOS | Sony FF 33MP BSI (A7 IV/A7C II) · 33MP full-frame Exmor R BSI CMOS |
| Megapixels | 24.2 MP | 33 MP |
| Autofocus | Hybrid | Hybrid |
| IBIS | 5-axis 5-stop | 5-axis 5.5-stop |
| Weather sealed | Yes | Yes |
| Max video | 4K30 | 4K60 |
| Max native ISO | ISO 51,200 | ISO 51,200 |
| Body weight | 650 g | 699 g |
| Dimensions | 127 × 96 × 74 mm | 131 × 96 × 80 mm |
| Body material | magnesium alloy | magnesium alloy |
| Released | 2018-02-26 | 2021-10-21 |
| Discontinued | — | — |
| Status | current | current |
| MSRP | $1,999 | $2,499 |
| Current low | $799 | $1,409 |
| vs MSRP | -60% | -44% |
Dynamic range, head to head
Both sensors plotted on one chart, across the full ISO range. The higher line holds more shadow-to-highlight latitude at that ISO.
Overlay both curves on Photons to PhotosMeasurements by William J. Claff. We link rather than reprint them.
The verdicts above describe price timing. They don't tell you which camera fits your shooting style. See /methods for how we normalize seller conditions and compute the deal score.