Excerpt: Fisheye novelty lens. Fun to use. But takes practice and an eye for creativity to use well. Lens is small and light. Focus ring a bit tight but not bad as focusing can be estimated and depth of focus takes care of the rest.Best results, use magnified view to focus accurately. Use a smaller aperture and objects from inches away to infinity will be in focus or close enough to not matter greatly. Lens is sharp enough. Ultra wide view creates a new way to see the world.
Excerpt: Very sharp. Reasonably priced. A fun lens. Be careful not to damage the front element. Focusing ring is somewhat stiff, perhaps because Roticon concentrates on video. But focusing is somewhat of a no-brainer. It's a fisheye. DOF is very great.
Excerpt: This is a great lens to have for my glidecam. I also enjoy using this to do timelapse video of my wife and I eating out or for weddings. Don't expect for this lens to blow you away with it's image quality. I own a 5DM3 and L lenses, so I can see a difference. However, like I said, this is a fun piece of gear to use for experiments and glidecam.
Excerpt: Great for those close up shots. Sturdy construction. Only complaint: mount is a bit tight when putting on camera. My other lens fit smoothly and perfectly on my GH2, but this lens is a tiny bit off and thus, requires a bit more oomph than is normal to get the lens to lock into place.
Summary: For some personal background, I have five cameras only one of which is an SLR. I buy and sell cameras all the time perpetually looking for the Holy Grail. Though more a picture taker than a photographer, I was intrigued by the possibilities of a fisheye even though I'd have to abandon my automatic d0-it-all-for-you settings. The Rokinon, Samyang, and Bower versions of this lens are essentially the same, so my priority was price.
Summary: It is definitely a sharp lens. The only thing I have to complain about is how hard the focus ring is. I definitely recommend the lens, especially if you plan on getting the 9-18mm lens just for its wide angle at 9mm. I have rectified pictures taken with the Rokinon 7.5mm, and cropped them to get the same field of view you get with the Olympus lens at 9mm. What I can say is that the result is as good as what you would get with the Olympus at 9mm.
Excerpt: I'm a frequent flyer for work reasons,and this lens is perfect for weight and size! Now i can take beautiful landscape pictures without carry with me all the dlr equipement! Sharp image and really easy to use! For the price i couldn't really complaint about nothing!