An economical solution to get entry the real wide angle photography. Well built massive metal lens and pretty light weight not heavy at all. At least 3-5 times less money than the better lenses. I suggest to buy and use for traveling or in bad weather condition if you don't want take a risk with expensive lenses.
My definition of this is 20mm and below, without going "fisheye". This, of course, brings us to the 19mm Vivitar 3.8. There aren't too many lenses out there to choose from that give you this wide a focal length that aren't fisheye lenses to choose from. Of those, most are expensive. Too expensive, in fact, for what might be considered a "novelty lens" that isn't always going to be in your camera bag al the time. Not willing to spend a small fortune for a lens that I knew going in that I'm not going to use very often but none-the-less want the focal length, the Vivitar was a natural - perhaps only, choice. I woud rate this lens optically as "good". Not great, but certainly acceptaby sharp with good color rendition. The barrel distortion was less than I expected for a lens in this price range. It has all metal construction and solidly built.
The Vivitar 19mm is a great lens,but compared with my Nikon 20 mm F4,theres a some way to go..but not enormous!This Vivitar is amazing for the price and i use it sometimes even for prowork getting great results,i use mainly for travelling,and can recomand this product very much,whether you are skilled or not. I rate it Highly but bevare of flare with it.!.. buy a good filter and lens hood,which is almost as expensive as this lens,and youll get good results.
This is one of the few inexpensive, ultra wide primes out there. You simply cannot find a better value. Linear distortion is suprisingly low. If you can find a lens shade wide enough (small filter diameter) it's a decent lens. You'll need to spend at least five times more to get a significant jump in image quality.