Sony a7 III → Sony a7 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 a7 IV is the direct successor to your Sony a7 III, released 3 years later. Across the full spec sheet it improves 6 items and steps back on 4. The changes that matter most: resolution rises from 24.2MP to 33MP; 4K goes from 30p to 60p. The Sony a7 IV lists at $2,499 (the Sony a7 III launched at $1,999, 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 a7 IV if…
- ✓You shoot video seriously — it brings smoother 60p 4K vs 30p and no per-clip recording limit (vs a 29-min cap).
- ✓You want maximum detail for landscapes, studio or large prints — 33MP resolves noticeably more than 24.2MP and gives more cropping latitude.
- ✓You vlog or shoot handheld solo — the fully-articulating screen flips to face you and there's a mic input for clean audio.
- ✓You shoot in low light or indoors — AF that focuses down to -4 EV gives it the edge after dark.
Stick with the Sony a7 III if…
- •You're budget-conscious — it launched at $1,999, about $500 less, freeing money for lenses.
- •You need backup-while-you-shoot reliability — dual card slots (the other has one) matter for paid work like weddings and events.
- •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 (17 items)
↑ 6 improved · ↓ 4 stepped back · → changed without a clear better/worse
| Spec | Sony a7 III | Sony a7 IV |
|---|---|---|
| Imaging | ||
| →Image Processor | BIONZ X | BIONZ XR |
| ↑Effective Resolution | 24.2 MP | 33 MP |
| Video Capture | ||
| ↑4K Recording | Up to 30p | Up to 60p |
| →Recording Limit | 29 min | No limit |
| →HDMI Output | Micro (Type D) | Full-size (Type A) |
| Focus | ||
| ↑Phase Detect Points | 693 | 759 |
| ↑Low Light AF | -3 EV | -4 EV |
| Viewfinder | ||
| ↑EVF Resolution | 2.36M dots | 3.69M dots |
| Monitor | ||
| ↑LCD Resolution | 0.92M dots | 1.04M dots |
| →LCD Type | Tilting | Vari-Angle |
| Interface | ||
| →USB | USB-C 3.1 Gen 1 | USB-C 3.2 Gen 2 |
| →Memory Card Slots | 2x SD (1x UHS-II) | 1x CFexpress Type A / SD UHS-II + 1x SD UHS-II |
| General | ||
| ↓Price (MSRP) | $1,999 | $2,499 |
| →Dimensions | 126.9×95.6×73.7 mm | 131.3×96.4×79.8 mm |
| ↓Weight | 650g (1.43 lb) | 658g (1.45 lb) |
| ↓Battery Life (EVF) | 610 shots | 520 shots |
| ↓Battery Life (LCD) | 710 shots | 580 shots |
What stayed the same (32 items)
Everything below is identical on both bodies — if these are what you buy a camera for, the Sony a7 III already has them.
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Sony a7 III (keep or buy used)
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Sony a7 IV
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Frequently asked
Is it worth upgrading from the Sony a7 III to the Sony a7 IV?
The Sony a7 IV is the direct successor to your Sony a7 III, released 3 years later. Across the full spec sheet it improves 6 items and steps back on 4. The changes that matter most: resolution rises from 24.2MP to 33MP; 4K goes from 30p to 60p. The Sony a7 IV lists at $2,499 (the Sony a7 III launched at $1,999, 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 a7 IV over the Sony a7 III?
Across the spec sheet the Sony a7 IV improves 6 items. The most significant: it brings smoother 60p 4K vs 30p and no per-clip recording limit (vs a 29-min cap). 33MP resolves noticeably more than 24.2MP and gives more cropping latitude. the fully-articulating screen flips to face you and there's a mic input for clean audio. AF that focuses down to -4 EV gives it the edge after dark.
What does the Sony a7 III still do just as well as the Sony a7 IV?
32 spec items are identical between the two, including sensor type (BSI CMOS), sensor size (Full-Frame), lens mount (Sony E), iso range (native) (100 – 51200), iso range (extended) (50 – 204800), mechanical shutter (1/8000). If those cover your needs, the older body remains fully capable.
Does the Sony a7 IV give anything up compared to the Sony a7 III?
Yes — 4 items on the spec sheet move the other way: price (msrp) ($1,999 → $2,499), weight (650g (1.43 lb) → 658g (1.45 lb)), battery life (evf) (610 shots → 520 shots), battery life (lcd) (710 shots → 580 shots).