Review on 7artisans Ultra-Thin Prime Lens 18mm F6.3 for Sony E-Mount Mirrorless Cameras - APS-C Lens Compatible with Sony A7, A7II, A7III (A7M3), A7R, A7RIII, A7S, A7SIII, A6000, A6300 by Trevor Blazis

Excellent value for money. Use this on a full size Sony camera. Of course these are vignettes, but they can be cropped in camera or even better in post. While not exactly sharp, it sharpens fairly well in post-post, offering a wide range of focus from a few meters to infinity. Very fun to play with and, with a little care, can also be used for meticulous professional work.