It's weird and wonderful, as a fish-eye should be. This is a solid lens offering from Sigma. In spite of the enormous depth-of-field that is inherently available in such a lens, auto-focusing is a useful thing.

This Sigma 4.5mm was bought for night star shots, horizon to horizon, and it does that indeed. In other uses, if one can keep one's feet out of the frame, it is wonderful for cityscapes. A walk in the park can be almost magical with this real fisheye.

MyCircular Fisheye Lens arrived at home without damage one day earlier.

Fantastic lens. One of the best fisheyes I've owned and some of my others have been far more expensive.

Fantastic lens. For an idea of what this lens can do, go on any of the picture social websites.

Like the lens, but it took a LONG time to get it.

I picked this one out for my Sony Alpha 77 from all the other options, because this one has autofocus. I take a lot of self portraits and I needed autofocus for that purpose. It is exactly what I expected, works well in low light, sufficiently sharp, and fun to use.

This is the most extreme fish eye lens you can get for a APS-C camera. With a full 180 view, you get a full circular image, like the Sigma 8mm FE on a full frame cmera. Good lens quality. Luminous, fast and an excellent minimal distance of focus.

I've wanted a "comedy" lens for a while and also wanted to continue with VR pano shots without having to shoot 100 plus pics for hours of stitching so I plumped for this little lens. On unpacking, i have to say that for my first Sigma, I was pleasantly surprised.

• +

  Quick Focus, Rugged

• -

  Blurry Focus

Perhaps I got a bad lens, but this lens is far too soft for my purposes. Remember, 180 degrees of vision is squeezed into a circle within the rectangular canvas of your camera's sensor (hence circular fisheye).