In this video I unbox and test the Brightin Star 12mm f/2.8 fully manual ultra-wide prime on my Canon EOS R6 Mark II. Right away you can tell it’s an all-metal lens with a bit of weight, a labeled cap (love that for quick ID in the bag), a built-in petal hood, clicked aperture from f/2.8 to f/16, and a very short focus throw. I also show the rear element and how the lens balances on the R6 II—size-wise it looks right at home. The big reason I was excited is the “almost zero distortion” look. I’ve wanted that vibe since the Laowa zero distortion lens, but that one’s pricey—this is way more affordable. I walk through real samples and why this lens makes sense for architecture and interiors (Airbnbs, hotels, small rooms) where you want wide coverage without screaming “ultra-wide distortion.” Image quality is surprisingly clean: sharp pretty much to the edges with a little contrast/sharpness drop near the extremes, very low distortion, well-controlled flare, and chromatic aberration that’s hard to spot unless you’re really pushing it wide open into bright light. The rear screw-in filter mount is the sleeper feature—being able to run filters on a 12mm like this is genuinely a game changer for landscapes and water scenes. My main tradeoff: it’s compact, but not lightweight, and you’ll feel it on long walks.