Designed for full frame cameras, the Laowa 9mm f/5.6 FF RL is currently the world’s widest rectilinear lens. The remarkable 135° angle of view allows you to capture landscape images with ease and realise formerly impossible shots. The lens includes 2 aspherical elements and 2 extra-low dispersion elements to suppress chromatic aberrations and distortion to the minimum. Despite the one-of-a-kind perspective, the lens itself is super compact (2.4″ / 6cm long) and weigh only 12.3 oz. / 350 g. It also features an extremely close focusing distance of 4.72″ / 12cm (from subject to sensor) for photographers to create mini macro shots with ultra-wide perspective.
https://www.venuslens.net/product/laowa-9mm-f-5-6-ff-rl/
https://laowa.com.hk/product/9mm-f-5-6/?srsltid=AfmBOoohV83m6-OnBr1FrMirjxzQmtGuK1GtO4xstYjw3wQWc5gi2v3-