7artisans 4mm F2.8 Circular Fisheye Lens, 225° Ultra-Wide Angle of View, Compatible with APS-C Sony E-Mount Cameras a6400 a6300 a6100 a6000 a5100 a5000 a6500 a6600 Nex-3 Nex-3N Nex-3R Nex-5 Nex-7

APS-C Format Lens: The Ultra wide-angle 4mm f/2.8 fisheye lens is designed for APS-C Sony E-mount mirrorless cameras and provides an 6mm equivalent focal length.
Ultra-wide Angle of View: Exceptionally wide 225° angle of view along with a circular fisheye design produces a highly distorted image for creative applications as well as to stitch images together for full 360° panoramas.
Ideal Aperture: Bright f/2.8 maximum aperture is well-suited to working in low and difficult lighting conditions.
Compact Construction: The lightweight and small design make this lens suitable for use on drones as well as being ideal for VR imaging, action sports filming, or virtual tours.
Manual focus design: The lens is a manual focus design that offers a minimum focusing distance of 0.85m. A multi-layer coating enhances colour, reduces glare, prevents ghosting, and ensures a sharp image.