We've tested this exact camera against a real NEF sample file and independently verified the shutter count against exiftool — this one is confirmed working.

Shutter count for the Nikon D300S is read from MakerNote tag 0x00A7 (ShutterCount) in the camera's NEF file metadata — entirely in your browser, the file is never uploaded anywhere.

Check your D300S shutter count →

Canon, Nikon, Sony and Fujifilm publish a rated shutter durability for most bodies — for the D300S, that figure is approximately 150,000 actuations. This is a statistical durability rating from the manufacturer, not a hard limit — many shutters keep working well past it, and some fail earlier.