Peleng 8mm f3.5 fisheye lens with M42 screw mount.
Only used a few times. In overall very good condition - glass is clean and clear, no scratches and the aperture rings turns nice and smoothly. There is something that sort of looks like cleaning marks or something like that on a very small area near the edge of the front element but this does not affect image quality (you can see these marks in the photos of the lens.)
Comes with front and rear lens caps, lens case and the original box. Originally, this lens came with an M42 to Micro 4/3 lens adapter but I seemed to have misplaced it. However, you can get all sorts of adapters off ebay for various camera mounts like Canon EF, Nikon, Pentax K etc.
And a photo I took with this lens (mounted to a Panasonic G2 Micro 4/3 camera)