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Sigma 8mm F3.5 EX DG Circular Fisheye

Review Date: Jan 4, 2013 Recommend? yes | Price paid: $870.00 | Rating: 8 

Pros: Very wide angle

The Sigma 8mm f/3.5 is a very well constructed lens. accidentally, it drop 2 times out of my camera bag from 50cm on a wooden floor and continues to work great.

Being a circular fisheye, it shows vignetting on a cropped sensor camera and a full circular image on full frame sensors. On cropped sensor it has a horizontal fov of 180 degrees.

Sharpness is great between f/5.6 - f/11. Setting the focus manually at the 1 mtr mark gets everything in focus from ~30cm to infinity. When using the lens on autofocus, the resulting image gets soft at infinity on the focus scale of the lens.

Chromatic aberrations are visible, but are mostly removable during raw processing.

Used by me mostly for creation of 360 x 180 degree panoramic images with Nikon D300 camera.
Have a look at for several image examples and virtual tours created with this lens.