AstrHori 6mm f/2.8 Fisheye Review: 220° of Creative Insanity for Under $300

I am a confessed glass hound. Lenses in my kit range from a vintage 1981 Nikkor 28mm f/2.8 AIS to funky and fantastic, off brand lenses, like the Helios 44-2 58 mm f/2 Russian lens. To wit, this new one in my bag, the AstrHori 6mm f/2.8 fisheye…