At first I was suspicious of this product because it is an unconventional lens. Rather, it attaches to the front of the 16mm lens that came with my Sony Nex. When attached (via the bayonet mount) there is minimal play which got me thinking about its durability and sharpness. I didn't have to worry. For a fisheye, the resulting images are very sharp edge-to-edge and never came close to falling off or shaking. I've been traveling with this lens for over two years, traveling four continents and taking thousands of shots with ease. A very minor downside is if you want to leave the filter on a 16mm lens you will need to remove the filter before attaching the fisheye attachment. If you take into account the compact size and the price of just over a hundred dollars, the purchase will not be difficult!
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