Start with an untouched file
Copy a recent image directly from the camera card. Editing software, messaging services and image optimizers may remove manufacturer-specific MakerNotes while leaving ordinary exposure metadata. A missing counter is therefore not a zero counter.
Preserve the tag name
Different camera families expose different layouts. This direct reader handles Nikon type-3 MakerNotes and reports the actual recognized tag. For other brands, run ExifTool locally and import its numeric JSON output rather than guessing from the filename.
Keep the original file and exported evidence together. A TIFF fixture can demonstrate parsing but cannot authenticate a camera or prove when its shutter was serviced.
Run a controlled metadata check
Choose the original-file workflow and select an untouched Nikon JPEG, TIFF or NEF. A supported result contains camera make/model plus a row such as Nikon:0x00a7, ShutterCount,526. That row means the parser read the recognized field’s numeric value. It does not prove that 526 is the complete mechanical history of the device. The Nikon D70 test fixture used in development provides this known value.
Export the CSV or JSON evidence before inspecting another camera. Keep the filename, exact tag and interpretation together; a screenshot showing only a large number omits the information needed to understand it. Avoid publishing serial numbers or location metadata from a broader external export unless you intend to share them.
Respond correctly to an unknown result
An unknown result can mean absent MakerNotes, a supported manufacturer with another layout, or a genuinely unavailable field. Try an untouched recent file before drawing conclusions. The tool directly implements only Nikon type-3 layouts with specific documented tags. It does not derive a shutter count from the filename, image sequence number, capture date or number of photos in a folder.