This Entaniya E-Mount Adapter allows you to attach the Entaniya Hal 250° Extreme-Fisheye Lens to E-mount cameras. This adapter is one of three components that make up the complete Hal 250° lens.
The lens is offered in three parts to provide you with the flexibility to simply swap parts instead of purchasing multiple lenses. The other two parts, sold separately, are the Front Group Element (which is the optical factor of the lens) and the Rear Group Element (which determines the focal length and which comes in multiple versions). The three assemble into one complete, extreme-fisheye lens.