Is the e mount for sony full frame or half frame?

The e mount for sony supports both full frame and half frame cameras, depending on the lens type and camera model. The FE mount lens is designed specifically for full frame cameras, while the E mount lens is typically used for APS-C format cameras. ‌‌‌‌
Format compatibility of e mount for sony
Full frame and APS-C format coexist.
FE series lenses: E-mount lenses with the prefix "FE" are designed specifically for full frame sensors, such as the FE 16-35mm F2.8 GM II. ‌‌
E-series lenses: E-mount lenses without the prefix "FE" (such as SEL16F28) are designed in APS-C format with a smaller imaging circle. ‌‌
Cross frame compatibility.
Full frame cameras (such as ZV-E1) are compatible with both types of lenses, but when using APS-C lenses, they will automatically crop to half frame mode. ‌‌‌‌
Although APS-C cameras (such as Alpha 6700) can be equipped with full frame lenses, they cannot fully utilize the advantages of full frame image fields. ‌‌
Key Differences
Features FE mount (full frame) E mount (APS-C)
Lens prefix FE (e.g. FE 24-70mm F2.8) E (e.g. E 50mm F1.8)
Applicable models include A7/A9 series, ZV-E1, A6000 series, A6100, etc
The imaging circle covers the full frame and only covers the APS-C frame
Universal compatibility with APS-C body, full frame body requires cropping mode
Practical application suggestions
Full frame users: prioritize FE mount lenses to ensure image quality and viewing angle. ‌‌
APS-C users: E-mount lenses are lighter and more economical, and FE lenses can obtain longer focal lengths through focal length conversion. ‌‌