Sigma AF 15mm f/2.8 EX Fisheye

For a non-OEM fisheye, not bad at all! Seems to be as good as both my 16mm Nikkor and my 10.5mm Nikkor in image quality. Note: Because this is a fisheye, there's a little loss of IQ compared to rectalinear wide angles, thus, the IQ is 4.5 stars, but you can't split stars on eBay! I've used Nikon fisheyes, both 8mm and 16mm for about 35 years and bought my first 15 years ago when I found a great deal on my 16mm 2.8. When the Nikon digital SLRs came out, one of the first lenses I got was the 10.5mm full-frame DX fisheye. Both have been great lenses and each has paid for itself, usually on the first project. When I needed to shoot the circular fisheye again, Nikon Pro Services no longer had the 8mm, so I checked the Sigma fisheyes. The 4.5mm, though useable on the DX camera, isn't the best performer, but is ok. The 8mm on FX, though, looked as good as what I used to get with the Nikkor 8mm 2.8 on film, so I was happy as was my client. I decided it was time to update my 16mm to an AF and with other reviews of this lens, I decided to give it a try. Well, I just took a critical look at an HDR image shot with this lens with tons of contrast and specular, out of range highlights. It's a winner! When nothing else is wide enough, you need to go fisheye. When you can't get the right ones from your camera's manufacturer or the price is too much, the Sigma 8mm and 15mm fisheyes for FX/Full-frame digital will do you quite well!Read full review

This one is a good one Not everyone wants a fisheye lens. It's one of those 'special' lenses outside the normal range. If you're shooting lots of landscapes, then this lens gives you more versatility and wider range than those from Canon, Vivitar or Nikon. And it gives you really great results. This lens is designed well, manufactured well and works well. If you pay attention to the way you line up your shot, it's almost as if you've taken a 'normal' picture instead of a wide-angle shot. Put the midline down the middle of your subject and everything stays in proportion. Great for those landscape shots you used to make multiple passes on with your other lenses. If you're trying to capture more of an interior space, then the very edges of the shot will be curved inward. That can be fixed with software, to straighten them out and make the edges parallel. The image is very clear and will blow up well. Color transport through the lens matches extremely well with what you see. In short, I think this one's a winner.Read full review

Sweet Lens Awesome quality lens, optics are great, and the f/2.8 really helps in darker situations. The only problems I find are that on DX or crop sensor cameras the fisheye effect seems to not be as effective and creates more of a vaguely distorted image. But when used with a FX, full frame or 35mm film camera the results are phenomenal. The lens has actually stayed on my 35mm film since I bought it.