I have experimented with the Beastgrip 1.33x and 1.55x adapters using full frame cameras and wide/normal to short telephoto lenses (35/40/50/75). I have tried with my slow Leica M lenses, which are usually pretty forgiving on coverage. These Anamorphics will cover full frame and are easy enough to attach to the M mount lenses with a 39 to 37 step down ring. the 1.33x is definitely a better fit for the 35 & 40mm lenses, as the 1.55x has a pretty wide FOV. Results are similar to the above samples, with soft edges and major distortion. But definitely plenty of character. Next time I take a stab at it, I'll post some samples.