Sony a7R III → Sony a7R IV
Is the upgrade worth it? Every change on the spec sheet, and an honest read on who should bother.
The bottom line
The Sony a7R IV is the direct successor to your Sony a7R III, released 2 years later. Across the full spec sheet it improves 5 items and steps back on 4. The changes that matter most: resolution rises from 42.4MP to 61MP. The Sony a7R IV lists at $3,499 (the Sony a7R III launched at $3,199, and older bodies typically sell for well under launch price on the used market). The generation gap here is modest — upgrade only if a specific change below solves a real problem in your shooting.
Upgrade to the Sony a7R IV if…
- ✓You want maximum detail for landscapes, studio or large prints — 61MP resolves noticeably more than 42.4MP and gives more cropping latitude.
- ✓You shoot in low light or indoors — AF that focuses down to -3 EV gives it the edge after dark.
Stick with the Sony a7R III if…
- •None of the headline changes map to what you actually shoot — the camera you own doesn't get worse when a successor launches.
What changed (11 items)
↑ 5 improved · ↓ 4 stepped back · → changed without a clear better/worse
| Spec | Sony a7R III | Sony a7R IV |
|---|---|---|
| Imaging | ||
| ↑Effective Resolution | 42.4 MP | 61 MP |
| Focus | ||
| ↑Phase Detect Points | 399 | 567 |
| ↑Low Light AF | -2 EV | -3 EV |
| Viewfinder | ||
| ↑EVF Resolution | 3.69M dots | 5.76M dots |
| Monitor | ||
| ↑LCD Size | 3" | 3.2" |
| Interface | ||
| →Memory Card Slots | 2x SD (1x UHS-II) | 2x SD UHS-II |
| General | ||
| ↓Price (MSRP) | $3,199 | $3,499 |
| →Dimensions | 126.9×95.6×73.7 mm | 128.9×96.4×77.5 mm |
| ↓Weight | 657g (1.45 lb) | 665g (1.47 lb) |
| ↓Battery Life (EVF) | 650 shots | 530 shots |
| ↓Battery Life (LCD) | 800 shots | 670 shots |
What stayed the same (37 items)
Everything below is identical on both bodies — if these are what you buy a camera for, the Sony a7R III already has them.
Ready to buy?
Sony a7R III (keep or buy used)
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Sony a7R IV
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Frequently asked
Is it worth upgrading from the Sony a7R III to the Sony a7R IV?
The Sony a7R IV is the direct successor to your Sony a7R III, released 2 years later. Across the full spec sheet it improves 5 items and steps back on 4. The changes that matter most: resolution rises from 42.4MP to 61MP. The Sony a7R IV lists at $3,499 (the Sony a7R III launched at $3,199, and older bodies typically sell for well under launch price on the used market). The generation gap here is modest — upgrade only if a specific change below solves a real problem in your shooting.
What are the biggest improvements of the Sony a7R IV over the Sony a7R III?
Across the spec sheet the Sony a7R IV improves 5 items. The most significant: 61MP resolves noticeably more than 42.4MP and gives more cropping latitude. AF that focuses down to -3 EV gives it the edge after dark.
What does the Sony a7R III still do just as well as the Sony a7R IV?
37 spec items are identical between the two, including sensor type (BSI CMOS), sensor size (Full-Frame), image processor (BIONZ X), lens mount (Sony E), iso range (native) (100 – 32000), iso range (extended) (50 – 102400). If those cover your needs, the older body remains fully capable.
Does the Sony a7R IV give anything up compared to the Sony a7R III?
Yes — 4 items on the spec sheet move the other way: price (msrp) ($3,199 → $3,499), weight (657g (1.45 lb) → 665g (1.47 lb)), battery life (evf) (650 shots → 530 shots), battery life (lcd) (800 shots → 670 shots).