http://photorumors.com/2015/06/23/venus-optics-announces-the-laowa-15mm-f4-the-worlds-widest-11-macro-lens/From the manufacturer's PR release:
The first 1:1 Macro lens with a 110° angle of view. It offers an impactful and unprecedented macro photography experience.
Anhui China, Jun 12, 2015 – Venus Optics, the Chinese camera lenses manufacturer who had launched the world’s first 2:1 Macro Lens in last September, has just released the world’s widest Macro lens for full frame cameras, Laowa 15mm f/4 Wide-Angled 1:1 Macro Lens.
The new Laowa 15mm f/4 1:1 Macro lens is the first lens in the market which possesses a ultra wide angle of view and 1:1 Macro ability. This allows photographers from around the world to start experiencing the rather undeveloped field of ‘Wide Angle Macro Photography’ without using an extension tube. Macro Lenses currently in the market tends to have a mid to long focal length and it limits users to take very close-up shots on the insect or flowers, without showing much of the background details like its habitat or environment.
and:
110 degrees of view angle
1:1 macro ability with infinity focus
+/- 6mm Shift ability
12 elements in 9 groups with 3 pieces of High Refractive elements and 1 piece of Extra-low dispersion lens
Multi-layer low-reflective coatings to avoid unnecessary flare
Carefully control on the sharpness both in the center and the edge.
Limited barrel distortion
14 pieces of aperture blades form a close-to-circular aperture
Flat Front element surface for filter installation.
The enclosure of the lens is made of metal to strengthen its durability.
Canon EF, Nikon F, Sony Alpha A, Sony FE & Pentax K mounts are available.
Full Frame Sensor Supported
Price: $479
http://www.venuslens.net/