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Can you recommand me a software for doing this job? I shoot using Sigma 8mm lens and I would like to be able to obtain a normal image out of that. The camera is canon 550D.

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4 Answers 4

Try Panorama Tools - free and very effective: http://panotools.sourceforge.net/

Useful thread here: http://photo.net/digital-darkroom-forum/00CBe8

There is a friendly interface to it called PTGUI.

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For defish the photos you can also use Hugin (it's free). Have a look to this and/or this link.

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Use a Lens Profile

If you're post-processing with Adobe software or software that understands Adobe's lens profiles, the easiest way to correct for the Sigma 8mm circular fisheye is to simply use a lens profile. According to the Sigma website, both Sigma's 4.5 and 8mm circular fisheye lenses have profiles in Adobe's databases. Simply enable lens profile correction in Adobe Camera RAW (ACR) or Lightroom's Develop module, and the image will be defished.

Use Panorama Tools via PTLens

The Panorama Tools open source suite of command line tools includes the capability of lens correction--basically building a profile on the fly. However, since not everyone is a command-line jockey, there are also a number of Panorama Tools GUI front-ends to consider that can do the same thing, such as Hugin or PTGui. But there is one PT frontend that is dedicated solely to the task of lens correction, which is PTLens. This may be easier to use and suss than going into the overkill of using Hugin or PTGui off-label, as both those apps are centered around panorama stitching.

Fisheye Hemi

Another popular tool for defishing is the commercial Fisheye-Hemi Photoshop plug-in. It's using a proprietary remapping that is not simple rectilinear defishing, which gives results some find more pleasing.

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Ken Rockwell wrote a review of DxO Optics that illustrates converting fisheye to rectilinear photos. The most impressive examples are the kitchen ones about 3/4 of the way down the page. I've used DxO and it's pretty good at this as long as you have a body/lens combination DxO has profiled.

Not a cheap solution, but certainly worth considering if you need the ultra-wide angle, but don't care for the distortion.

There are many other less comprehensive posts and of course DxO's own site. Google "DxO +architecture +fisheye".

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