How the Sony A7 IV and Nikon Z6 III compare on rated shutter life, sensor and value — and how to read the exact actuation count of either from a RAW file, free and in your browser.
Check Your Shutter Count →| Spec | A7 IV | Z6 III |
|---|---|---|
| Full name | Sony A7 IV | Nikon Z6 III |
| Released | 2021 | 2024 |
| Sensor | 33 MP full-frame | 24.5 MP full-frame |
| Category | full-frame mirrorless | full-frame mirrorless |
| RAW format | ARW | NEF |
| Shutter type | Mechanical + electronic | Mechanical + electronic |
| Rated shutter life | 150,000 | 400,000 |
The Z6 III is rated for 400,000 actuations versus 150,000 for the A7 IV — roughly 167% more rated shutter life. In practice that means a used Z6 III at a given actuation count has consumed a smaller share of its rated life than a A7 IV at the same count.
Rated figures are manufacturer estimates, not hard limits. Many bodies shoot well past their rating, while a small number fail earlier — the rating is best read as a durability class, not a countdown. When buying used, what matters is the actual actuation count relative to that rating, which you can read for free below.
The Z6 III is the newer design (2024 vs 2021), which usually means longer firmware support, a more current autofocus system and a stronger residual value — but also a higher used price.
On resolution the A7 IV leads at 33 MP full-frame against the Z6 III’s 24.5 MP full-frame — worth having if you crop hard or print large, while the Z6 III keeps file sizes and low-light noise in check.
If you are buying used and plan to shoot heavily, the higher 400,000-actuation rating on the Z6 III gives you more headroom before a shutter service becomes a consideration.
Remember you are also choosing a system: Sony (ARW files) and Nikon (NEF files) have different lens line-ups, so weigh the glass you already own or plan to buy.
The A7 IV writes ARW files and the Z6 III writes NEF files — ShutterCount handles both formats natively.
See the full model guides for each body: Sony A7 IV shutter count and Nikon Z6 III shutter count.
The Nikon Z6 III is rated for 400,000 actuations, higher than the Sony A7 IV’s 150,000. Individual shutters can last well beyond — or occasionally fall short of — the official rating.
Take a photo, then drop the resulting ARW (A7 IV) or NEF (Z6 III) RAW file into shuttercount.app. The count is read from the file’s MakerNote entirely in your browser — no upload, no account.
The Z6 III is newer (2024), which tends to mean better resale value and longer support; the A7 IV is often the better bargain used. Always verify the actual shutter count from an original RAW file before buying.
No. Only the manufacturer’s service centre can reset the hardware counter, and only after a physical shutter replacement. EXIF editors can rewrite surrounding metadata but cannot alter the in-camera counter, which is why you should always read it from an untouched ARW/NEF RAW file.
Compare shutter life and value across other popular bodies: