Lensbaby recently announced a new Petzval-inspired Twist 28mm f/3.5 full-frame manual-focus pancake lens with a classic swirling character:
The Twist 28 draws on 19th-century Petzval optical design, which produces a sharp center of focus with a swirling blur effect in the outer portions of the frame. At 28mm, this optical characteristic applies across a wider field of view than prior Twist lenses, which photographers have used to create layered, motion-influenced images in tighter focal lengths.