Ikasee Landscape by Jason Doss
Pentax K-1 mII and Pentax-K 17mm f4.0 Fisheye with built-in orange filter at f16, 1/125s, and ISO 400, in-camera jpg
...and this one.
Rose Hip with Raynox by Jason Doss
Pentax K-1 mII Limited Silver and Pentax-M 150mm f3.5 with Raynox 150 at f11, 1/90s, and ISO 800, focused at infinity
I like the rendering of the 31mm limited very much.
All the limited lenses of Pentax excel at rendering. Pentax was one of the early makers that put rendering before sharpness.