Panorama Tools to defish 8mm fisheye, help!

I am trying to figure out how to defish my images in Panorama tools. I

use an 8mm Sigma cirkular fisheye on a Canon 20D. I don't have much

experience using PT, and I have fiddled for hours with the "adjust"

filter. I can't seem to find the right way to stretch the image so

that only the corners need to be cropped out. I can only get a

cylinder like a "semi-fisheye", or a rectilinear with only a very

small part in the middle usable. Is there anyone out there with

experience of 8mm fisheyes who can help?

Really, it's easier to "stitch" a single image using PTGui with Pano Tools to do this conversion, but for the plugins, try this:<br><br>

 

1. Extend/crop the image canvas to a square that just includes the image circle. <br>

 

2. Use Remap (or PTRemap) to convert from Fisheye Horizontal to PSphere 180x180 degrees.<br>

 

3. Use Adjust (or PTAdjust) to convert from PSphere to whatever you need, e.g. 90 degree rectilinear:<br><br>

 

Select Insert, and Use Options<br>

 

Click Set <br>

Under Images, set HFOV=180, Format Psphere.<br>

Under Panorama, Set HFOV=90, Format rectilinear <br>

Under Stitching, set Load buffer, and "or paste", Colour correction none. Uncheck Save to buffer. Click OK OK. <br><br>

 

I suggest you use the latest 16-bit versions of the plugins from <a href="http://www.epaperpress.com">epaperpress.com</a> and the up-to-date pano12.dll from <a href="http://photocreations.ca/panotools/index.html">Jim Watter's page </a>.<br><br>

 

John

Thank you! That helped a lot.

why have a fisheye if you don't want the effect?!

Claude, I love the fisheye, but also want to use it as an ultrawide where the fisheye-effect is less pronounced. In the future I also hope to learn how to stitch panoramas with images from it.

Camilla, I have a tutorial for stitching images from the Sigma 8mm fisheye that you might like to make a note of:

 

http://homepage.ntlworld.com/j.houghton/360tute.htm