Are you using a plugin to add the images, or did you build teh table yourself?
If you built it yourself, you have this code
HTML Code:
<table class="photoblog" border="0">
<tbody>
<tr>
<td><a href="http://www.elefantin.nl/gallery/sprookjesbeelden/index.html"><br />
<img class="style_no_border" src="/blogged/blog_sprookjesbeelden/p1.jpg" alt="sprookesbeelden1" width="180" height="135" /></a></td>
<td><a href="http://www.elefantin.nl/gallery/sprookjesbeelden/index.html"><br />
<img class="style_no_border" src="/blogged/blog_sprookjesbeelden/p2.jpg" alt="sprookesbeelden2" width="100" height="135" /></a></td>
<td><a href="http://www.elefantin.nl/gallery/sprookjesbeelden/index.html"><br />
<img class="style_no_border" src="/blogged/blog_sprookjesbeelden/p3.jpg" alt="sprookesbeelden3" width="180" height="135" /></a></td>
<td><a href="http://www.elefantin.nl/gallery/sprookjesbeelden/index.html"><br />
<img class="style_no_border" src="/blogged/blog_sprookjesbeelden/p4.jpg" alt="sprookesbeelden4" width="100" height="135" /></a></td>
<td><a href="http://www.elefantin.nl/gallery/sprookjesbeelden/index.html"><br />
<img class="style_no_border" src="/blogged/blog_sprookjesbeelden/p5.jpg" alt="sprookesbeelden5" width="180" height="135" /></a></td>
</tr>
</tbody>
</table>
just change each of the class="style_no_border" to class="style_no_border size-full". The 'size-full' class is built into the Atahualpa CSS
If a plugin created the table, you could try a CSS Insert
HTML Code:
table.photoblog tr td a img.style_no_border{
max-width:96%;
width:auto 100%;
margin:5px 0 5px 0
}