Drop an ARW RAW file from your Sony A7C III (ILCE-7CM3) and get the exact shutter actuation count in seconds — processed entirely in your browser, never uploaded anywhere.
Check Shutter Count →The Sony A7C III (ILCE-7CM3) is the third generation of Sony's compact full-frame mirrorless line, following the A7C (2020) and A7C II (2023). The A7C III retains the signature side-opening flip LCD and slim body profile while upgrading to a 36 MP full-frame BSI CMOS sensor paired with the BIONZ XR2 image processor. Improvements over the A7C II include a higher-resolution sensor, refined AI subject recognition, and faster readout for reduced rolling shutter in video. The A7C III bridges the gap between the travel-oriented A7C II and the resolution-focused A7CR.
| Model | Release | Sensor | Est. Shutter Life | RAW Format |
|---|---|---|---|---|
| Sony A7C III (ILCE-7CM3) | 2026 | 36 MP full-frame BSI CMOS | ~200,000 est. | ARW |
| Sony A7C II (ILCE-7CM2) | 2023 | 33 MP full-frame BSI CMOS | ~200,000 est. | ARW |
| Sony A7CR (ILCE-7CR) | 2023 | 61 MP full-frame BSI CMOS | ~200,000 est. | ARW |
| Sony A7C (ILCE-7C) | 2020 | 24.2 MP full-frame BSI CMOS | ~200,000 est. | ARW |
You can drop multiple ARW files at once to compare actuation counts across a batch.
| Actuation Count | % of Est. Life | Assessment |
|---|---|---|
| 0 – 10,000 | 0 – 5 % | Near new |
| 10,000 – 60,000 | 5 – 30 % | Low use — plenty of life remaining |
| 60,000 – 120,000 | 30 – 60 % | Moderate use — normal for enthusiast use |
| 120,000 – 180,000 | 60 – 90 % | High use — negotiate price accordingly |
| 180,000 + | 90 %+ | Near or past est. life — budget for shutter service |
The A7C III is designed for travel, street, and hybrid photo-video use. Most owners accumulate counts well below 50,000 mechanical actuations per year, especially when using the electronic shutter for burst photography. A body at 80,000 shots may represent 2–3 years of regular use.
Like all Sony ARW bodies, the A7C III stores the shutter count encrypted in MakerNote tag 0x9050. ShutterCount applies the cubic residue decryption algorithm (modulo 249) and reads the 32-bit count from within the decrypted block. All decryption happens locally in your browser — the ARW file is never transmitted anywhere.
No. The A7C III's electronic shutter mode bypasses the mechanical curtain entirely and is not counted. Only mechanical shutter (and EFCS) exposures increment the counter. Because the A7C III supports high-speed silent shooting, photographers who frequently use burst modes will have a lower mechanical count relative to their total frame output.
Shoot an ARW RAW file, then drop it into shuttercount.app. The tool decrypts and reads the count from MakerNote tag 0x9050 in your browser.
Only a Sony authorised service centre can reset the hardware counter after a physical shutter replacement. Always verify from an original ARW file, not a screenshot or metadata editor output.
Both cameras use identical ARW format and Sony MakerNote encryption. The A7CR (61 MP) is aimed at high-resolution work; the A7C III (36 MP) focuses on a balance of speed and resolution. The shutter count reading method is identical for both.