New full frame standard: Sony Alpha 7 IV mileage diagnostics

Sony Alpha 7 IV (ILCE-7M4) is Sony's most popular professional camera. A new generation 33-megapixel sensor with a colossal dynamic range, 759 autofocus points with bird and animal recognition, 10 frames per second and full 4K 60p video recording - all this at a price significantly lower than older models. It is this ratio of capabilities and price that made the A7 IV a bestseller, and it is very common on the secondary market.

The wide audience of this camera - from wedding and reportage photographers to freelance videographers - means the most unpredictable history of a particular used copy. One A7 IV shot landscapes once a month, the other worked on hundreds of commercial shoots. Only the system counter will tell you the truth.

Shutter life and the importance of electronic shutter mode

Sony has set a guaranteed mechanical shutter life of 500,000 operations for the Alpha 7 IV. This is an absolute record for full-frame mirrorless cameras in its class - an indicator of the level of a professional reportage flagship. The mechanism is designed to withstand years of intensive commercial use.

The most important nuance of the Sony Alpha 7 IV: the electronic shutter (“Silent release” mode) does not wear out the mechanics at all. Sony professionals actively use it for silent shooting. As a result, the mechanical mileage can be very low even for a very “working” camera. Our service shows exactly the mechanical counter - a real indicator of the physical wear of the curtains.

How Sony records mileage in EXIF ​​ARW files

The BIONZ XR processor keeps accurate hardware records of mechanical and electronic triggers separately. Mileage data is hardware protected from user reset and is built into the file structure with each snapshot.

The counter is stored in a MakerNotes EXIF ​​utility block inside RAW (.ARW) and JPEG files. For diagnostics, use the original ARW file from the memory card - it contains a complete package of Sony branded tags necessary to accurately determine the mileage.