Drop an ARW file from your Sony A7R IV (ILCE-7RM4) and get the exact mechanical shutter actuation count in seconds — processed entirely in your browser, never uploaded anywhere.
Check Shutter Count →The Sony A7R IV (ILCE-7RM4), released in 2019, raised the full-frame resolution bar to 61 megapixels — a threshold that allowed medium-format-quality output from a 35mm sensor for the first time. It was Sony's flagship resolution body until the A7R V launched in 2022. The mechanical shutter is rated at 500,000 actuations, Sony's highest tier, appropriate for a body intended for studio, landscape, and commercial photography where every shot counts.
| Model | Release | Sensor | Rated Shutter Life | ARW Offset |
|---|---|---|---|---|
| Sony A7R IV (ILCE-7RM4) | 2019 | 61 MP full-frame BSI | 500,000 | 0x003a |
| Sony A7R V (ILCE-7RM5) | 2022 | 61 MP full-frame BSI (same sensor) | 500,000 | 0x003a |
| Sony A7 IV (ILCE-7M4) | 2021 | 33 MP full-frame BSI | 300,000 | 0x003a |
Use a file shot in mechanical shutter mode. The A7R IV's silent / electronic shutter mode does not increment the mechanical counter. As a high-resolution body, many owners use electronic shutter to avoid any vibration from the mechanical curtain at medium shutter speeds.
| Shutter Count | % of Rated Life | Assessment |
|---|---|---|
| 0 – 20,000 | < 4 % | Lightly used — excellent condition |
| 20,000 – 100,000 | 4 – 20 % | Normal use for age |
| 100,000 – 250,000 | 20 – 50 % | Moderate use — inspect carefully |
| 250,000 – 450,000 | 50 – 90 % | Heavy use — price accordingly |
| 450,000 + | 90 %+ | Near or past rated life |
The A7R IV is typically used in studio, landscape, and commercial settings where shutter counts accumulate more slowly than in sports or event photography. Units with very high counts (above 200,000) are unusual and warrant careful scrutiny.
The Sony A7R IV stores its mechanical shutter count encrypted in ARW MakerNote tag 0x9050. ShutterCount applies Sony's cubic residue decryption algorithm (modulo 249) and reads the count from byte offset 0x003a within the decrypted block. All decryption and parsing is performed locally in your browser — no file data is ever transmitted.
Shoot a mechanical ARW frame and drop it into shuttercount.app. The count is decrypted from tag 0x9050 at offset 0x003a in your browser, instantly and privately.
Sony rates the A7R IV at 500,000 actuations — the same as the A7R V, A7S III, A9 III, and A1.
The A7R V adds significantly better AI subject tracking AF (the difference between reliable and unreliable tracking of moving subjects), a dramatically improved 9.44M-dot EVF, 8-stop IBIS (vs 5.5-stop), and 4K/60p video. For studio and landscape work where the subject is stationary, the A7R IV at a lower used price is excellent value. For wildlife or editorial where tracking matters, the A7R V's AF is transformative.
Yes. Pixel Shift Multi Shooting uses the mechanical shutter to take 4 or 16 consecutive frames per capture. Each frame increments the mechanical counter individually. A photographer who heavily uses pixel shift may have a higher shutter count relative to the number of final composite images.
Only Sony authorised service centres can reset the hardware counter. Always verify from an original ARW file, not a screenshot or JPEG.