Buy the Sigma 1018mm f/2.8 at https://SDP.io/S1018

Tony Northrup reviews the Sigma 1018 f/2.8 superwide angle lens for APSC mirrorless cameras such as the Canon R100, R50, R10, and R7. It also fits APSC Sony cameras such as the Sony a6700, a6300, a6400, and a6000. It fits all Fuji Xmount cameras and Leica L cameras.

Tony tests the sharpness, contrast, handling, design, autofocus, and starburst. He specifically compares it to the Canon 1018mm f/4.56.3 lens. The Sigma is superior in basically every way: it gathers more than twice the light and it's sharper. However, the Sigma lacks image stabilization.