--- a/src/hugin1/hugin/xrc/data/help_en_EN/Fisheye_Projection.html
+++ b/src/hugin1/hugin/xrc/data/help_en_EN/Fisheye_Projection.html
@@ -66,7 +66,7 @@
 </td>
 <td> <img class="tex" alt="R=f\cdot\theta" src="1e3fbb44cf80bc872c3bc50c35a10b98.png" />
 </td>
-<td> e.g. Peleng 8mm f/3.5 Fisheye
+<td> e.g. Peleng 8mm f/3.5 Fisheye <br />This is the ideal fisheye projection panotools uses internally
 </td></tr>
 <tr>
 <td> stereographic
@@ -110,7 +110,8 @@
 <pre><img class="tex" alt="R=f*tan(\theta)\," src="ccf48cf728225d3dcecf1f74e74dafa3.png" />
 </pre>
 <p>More information on fisheyes<a class="external" href="http://wiki.panotools.org/Fisheyes">[*]</a> and their distortions from <a rel="nofollow" class="external text" href="http://www.bobatkins.com/photography/technical/field_of_view.html">Bob Atkins Photography</a>
-</p><p>(Content partly based on a mail by Helmut Dersch which can be found at W.J. Markerink's <a rel="nofollow" class="external text" href="http://www.a1.nl/phomepag/markerink/fishyfaq.htm">page about fisheye analysis</a>)
+</p><p>Panotools fisheye mapping mentioned by Helmut Dersch<a class="external" href="http://wiki.panotools.org/Helmut_Dersch">[*]</a> in <a rel="nofollow" class="external free" href="http://www.panotools.org/mailarchive/msg/6864#msg6864">http://www.panotools.org/mailarchive/msg/6864#msg6864</a>
+</p><p>(Content partly based on a mail by Helmut Dersch which can be found at W.J. Markerink's <strike><a rel="nofollow" class="external text" href="http://www.a1.nl/phomepag/markerink/fishyfaq.htm">page about fisheye analysis</a></strike> Link not valid anymore)
 </p>
 
 
@@ -118,7 +119,7 @@
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-				Retrieved from "http://wiki.panotools.org/index.php?title=Fisheye_Projection&amp;oldid=14718<a class="external" href="http://wiki.panotools.org/index.php?title=Fisheye_Projection&amp;oldid=14718">[*]</a>"				</div>
+				Retrieved from "http://wiki.panotools.org/index.php?title=Fisheye_Projection&amp;oldid=15452<a class="external" href="http://wiki.panotools.org/index.php?title=Fisheye_Projection&amp;oldid=15452">[*]</a>"				</div>
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