How much does this cost to the nearest dollar?

Sony 16mm Fisheye Converter Lens for Mirrorless Cameras, Black
Product Description To Be Announced From the Manufacturer Fisheye Converter for FE 28 mm F2 Lens Dedicated fisheye conversion lens for the FE 28 mm F2 provides 16 mm focal length with fisheye perspective and a full 180° angle of view (diagonally). The converter has been specifically designed for the FE 28 mm F2, and therefore offers expressive fisheye perspective with excellent image quality from infinity down to the closest focusing distance, without compromising the basic image quality of the lens. The sophisticated design seamlessly matches the lens, and is dust and moisture resistant for maximum reliability. 1 F3.5 maximum aperture when mounted on FE 28mm F2 

Price is $298.00

Price: $298