Constructed of 12 glass elements in 10 groups with aperture range of f2.8 - f22. It is wide angle lens,suitable for both Astrophotography, Landscape and Architectural Photography. The equivalent focal length is around 18mm. Includes removable lens hood, lens pouch. Minimum focusing distance of only 3.94 inches.
After trying this product, I found it to be completely underwhelming. While it did provide a slightly wider angle than my original lens, the quality of the images was mediocre at best. The lens was difficult to attach and didn`t stay secure on my camera..
I believe this is a cheaper alternative to the Rokinon 14mm. Clear image. I had to crop it so it's not exactly 12mm but it's still pretty wide for my video/streaming use. I tried Roquinone and returned it because I just didn't like the results of what I needed. This is easier to justify, it's very similar and looks great. FYI, I'm a noob when it comes to cameras/lenses so take what I say with a grain of salt.