Pentax 3.2mm f/5.6 Fisheye Lens (03) for Pentax Q System, Black at KEH Camera
Pentax Q Mount Fisheye Lens - Croydon Ringwood CameraHouse
Fish Eye Lens 8mm F3.8 For C Mount Camera + C To Micro M4/3 / Nex / N1 / Pentax Q /fuji / M M2 Adapter Ring For Dslr Camera - Camera Lenses - AliExpress
Pentax 04 Wide Toy Lens "Toy camera" wide-angle lens for Pentax Q-Series cameras at Crutchfield
Ricoh launches Pentax Q-mount ultra-wide-angle zoom: Digital Photography Review