Your DSLR-A330 writes its shutter count into every ARW file, and the browser tool on this site reads it: drop an unedited ARW in and the count comes back alongside the model, exposure data and capture dates, processed entirely on your machine. The value sits in an unencrypted 19,154-byte MakerNote block, at the offset ExifTool documents. Checked against ExifTool on two real A330 files, both read 1,526 in this tool and 1,526 in ExifTool. Where the value lives, how to cross-check it, and what the number means on a 2009 entry-level body are below.
Check Shutter Count →Sony announced the Alpha DSLR-A330 on 18 May 2009 alongside the A230 and the A380, and all three shipped that June. The A330 was the middle of that trio: it kept the A230's 10.2 MP CCD sensor but added the two things the cheapest body did without — Quick AF Live View and a vertically tilting screen — at $649 with the 18–55 mm kit lens, between the A230's $549 and the 14.2 MP A380's $849. It is the direct successor to the A300 and inherits that camera's live-view architecture: rather than reading the main sensor, a secondary mirror diverts light to a dedicated phase-detect AF sensor, which is why live view on these bodies focuses at normal DSLR speed.
Like every A-mount body, it carries Super SteadyShot INSIDE sensor-shift stabilisation, so stabilisation works with any A-mount lens including Minolta AF glass from 1985 onward. There is no movie mode — video did not reach the A-mount line until the SLT-A33 and A55 in 2010 — and no electronic shutter, which makes the actuation question unusually clean on this camera.
| Specification | Sony Alpha 330 (DSLR-A330) |
|---|---|
| Announced / shipping | 18 May 2009 · from June 2009 · $649 with 18–55 mm kit lens |
| Sensor | 10.2 MP effective APS-C CCD (3872 × 2592) |
| Mount | Sony A-mount |
| Stabilisation | Super SteadyShot INSIDE — in-body, works with every A-mount lens |
| Viewfinder | Optical pentamirror |
| Live view | Quick AF Live View — secondary mirror to a dedicated phase-detect AF sensor |
| LCD | 2.7-inch, 230k dots, vertically tilting |
| Autofocus | 9 points |
| Sensitivity | ISO 100–3200 |
| Shutter | Focal-plane, 30 s – 1/4000 s |
| Burst | Approx. 2.5 fps through the viewfinder · approx. 2 fps in live view |
| Video | None |
| Storage | SD / SDHC and Memory Stick PRO Duo |
| RAW format | ARW — carries the shutter count, see below |
| Shutter durability | No figure published by Sony — commonly estimated at ~100,000 (est.) |
| Browser tool support | Model, EXIF and actuation count · matched ExifTool on two real A330 files |
Sony has moved the hiding place several times across the A-mount and E-mount generations, and the A330 sits in the oldest of the three schemes below.
Every A330 ARW carries a Sony MakerNote tag 0x0020 that is 19,154 bytes long on the A200, A230, A290, A300, A330, A350, A380 and A390 (and 19,148 bytes on the A700, A850 and A900). ExifTool names that block FocusInfo, and inside it, at offset 0x0846, sits a 32-bit little-endian value it reports as ShutterCount. Only the low 24 bits are the counter — ExifTool masks the value with 0x00FFFFFF — so a tool that reads all four bytes as one number can print something absurd. ExifTool marks the field valid for the DSLR-A230, A290, A330, A380, A390, A850 and A900.
The block is not encrypted. It is simply not a plain MakerNote entry either: the counter is a byte offset inside a large binary blob, which has to be located and indexed rather than looked up by tag number. That is exactly what the browser tool now does — until 27 October 2026 it treated 0x0846 as a MakerNote tag number rather than an offset inside the 0x0020 blob, which is why older versions of this page told you to use ExifTool instead.
0x0020; when that block is 19,154 or 19,148 bytes long and the model is one of ExifTool’s seven (DSLR-A230, A290, A330, A380, A390, A850, A900), it takes the 32-bit value at offset 0x0846 and masks it to 24 bits, the same way ExifTool does. The result is labelled Sony MakerNote 0x0020 FocusInfo[0x0846]. In a check run on 27 October 2026 against ExifTool 13.59 on the repository’s full-size release files, both DSLR-A330 ARWs read 1,526 in this tool and 1,526 in ExifTool.
| Sony generation | Where the count lives | Browser tool |
|---|---|---|
| DSLR-A230 / A290 / A330 / A380 / A390 / A850 / A900 | MakerNote 0x0020 (FocusInfo, 19,154 or 19,148 bytes) → offset 0x0846 | ✓ Read in the browser — matched ExifTool on two files per model |
| DSLR-A200 / A300 / A350 / A700 | Same FocusInfo block, but ExifTool says the field is “only valid for some DSLR models” and these are not among them | ✗ Not read — on the A350 files ExifTool returned nothing either |
| DSLR-A450 / A500 / A550 / A560 / A580 | MakerNote 0x0020 (MoreInfo, 20,480 bytes) → sub-block 0x0201 | See each model’s own page |
| Later SLT, NEX, ILCE and ILCA bodies | Encrypted MakerNote 0x9050, model-specific offset | ✓ Read in the browser |
Sony MakerNote 0x0020 FocusInfo[0x0846]. Nothing is uploaded and no account is needed.If you want to cross-check the number, ExifTool — the free, open-source metadata reader whose Sony module documents the 0x0846 offset — reads the same field. It runs locally, reads the file and changes nothing. Install ExifTool (Windows, macOS or Linux) and run it against the same file:
The reply is a single line:
The two numbers should agree. If neither tool returns a count, add -a -G1 to the ExifTool command to see every group it found — on an A330 file the MakerNotes:FocusInfo group should be present. An empty result almost always means the file has been through an editor, or is a JPEG that was re-compressed. An untouched out-of-camera JPEG usually carries the same MakerNote block, but the ARW is the reliable choice.
Sony published no shutter durability figure for the A330, and none for the A230, A290, A380 or A390 either. The ~100,000 number attached to these bodies across the web — including in some pages on this site — is an estimate based on what entry-level DSLRs of that period were generally understood to manage, not a specification you can hold Sony to. Read the table below as a rough yardstick against an estimate, not as a countdown against a warranty.
| Actuation count | Share of the ~100,000 estimate | Assessment |
|---|---|---|
| 0 – 10,000 | 0 – 10 % | Very low use — typical of a hobbyist body |
| 10,000 – 40,000 | 10 – 40 % | Low to moderate use |
| 40,000 – 75,000 | 40 – 75 % | Moderate to heavy for this class |
| 75,000 + | 75 %+ | Heavy — price it as a body that may need the shutter unit |
On a camera this old the count is rarely the deciding factor. An A330 is now seventeen years old, most examples were bought as first DSLRs and shot a few thousand frames a year, and the parts that actually fail tend not to be the shutter: the rubber grip coating goes sticky, the tilting screen hinge loosens, dust settles on the CCD, and NP-FH50 batteries of this vintage hold very little charge — while the sensor itself was never strong above ISO 800 and has not improved with age. A high count on a cheap body is worth less concern than a sticky mirror or a hinge with play in it.
One genuinely useful check: because the A330 has no video and no electronic shutter, its counter is close to the true actuation figure. That makes it a better proxy for wear than the same number on a modern mirrorless body, where most frames may never have touched the blades.
Dropping an A330 ARW into the tool is worth doing when you are checking a listing, because everything it reports is verifiable fact about the camera that made that file:
0x0846, the same field ExifTool reports.Everything runs in your browser; no file is uploaded. ExifTool is there as a second opinion if you want one, not as a requirement.
Later Sony generations store the count in the encrypted 0x9050 block, which the tool also decodes; the bodies below were confirmed against full release samples rather than inferred.
The A230, A290, A380, A390 and A900 use the same FocusInfo field and matched ExifTool exactly on two files each in the 27 October 2026 run. The A300 and A350 are outside ExifTool’s list for this field, so the tool does not read them; on the A350 files ExifTool returned nothing either.
Yes. The tool reads the counter from offset 0x0846 of the unencrypted MakerNote 0x0020 block and shows it with the model, exposure data and dates. Checked against ExifTool 13.59 on 27 October 2026, both real A330 ARWs read 1,526 in this tool and 1,526 in ExifTool. ExifTool stays available as an optional second opinion.
No. Sony added a Shutter Count entry to the setup menu on the later SLT bodies; the 2009 A-mount DSLRs have no owner-facing readout. The metadata in the file is the accessible source. An authorised service centre can read the body's internal counter directly, where you can still find one that services cameras this old.
No. The counter comes from the camera body, not from the card, so formatting cannot touch it. What formatting and the File Number setting can restart is the DCF file numbering — worth knowing, because file numbers are often mistaken for actuation counts. A body writing DSC00042.ARW may have fired many thousands of frames.
Nothing published. Sony did not quote a shutter durability figure for its entry-level A-mount DSLRs, so the ~100,000 number in circulation is an estimate drawn from the class norm of the period rather than a Sony specification. Any page giving you an exact rated figure for an A330 is quoting an estimate as though it were a fact.
The DSLR-A230, A290, A380, A390, A850 and A900 use the same field, and the tool reads it on all of them; each matched ExifTool exactly on two files in the 27 October 2026 run. The A200, A300, A350 and A700 carry the same block, but ExifTool says the field is only valid for some DSLR models, so the tool does not report a count for them; on the A350 files ExifTool returned nothing either. The A450, A500, A550, A560 and A580 use a differently structured block at the same tag, and later Sony generations moved to the encrypted 0x9050 block.
No. Quick AF Live View diverts light with a secondary mirror to a separate AF sensor rather than lifting the main mirror and opening the shutter, so running live view does not cycle the blades. Only recorded exposures do.
Usually something else. At this age the failure points that turn up are sticky grip rubber, a loose tilt-screen hinge, dust on the CCD, an aged NP-FH50 battery and the occasional sticky mirror. A count in the tens of thousands on a body of this class is unremarkable; a mirror that hesitates is not.
Announcement date, the A230 / A330 / A380 line-up and launch pricing: DPReview, “Sony launches Alpha 230, Alpha 330 and Alpha 380”. Specifications, live-view behaviour, burst rates, tilting screen, AF points, ISO and shutter-speed range, storage: Cameralabs review and the Imaging Resource review. Location, size and validity conditions of the shutter-count field — MakerNote tag 0x0020, the 19,154-byte FocusInfo block, offset 0x0846, the 0x00FFFFFF mask and the list of models it applies to: ExifTool’s Sony module, Sony.pm, and the published Sony tag names. Browser-tool result on the A330 and its siblings: the release-corpus validation run of 27 October 2026 (ExifTool 13.59, full-size release files), method label Sony MakerNote 0x0020 FocusInfo[0x0846]. No manufacturer shutter-durability figure exists for the DSLR-A330; the ~100,000 figure is identified here as an estimate for exactly that reason.