<p>Three 55 mm camera <a href="//commons.wikimedia.org/w/index.php?title=Filter_(photography)&amp;action=edit&amp;redlink=1" class="new" title="Filter (photography) (page does not exist)">filters</a>. From left to right:<br></p>
<ul><li>"<a href="//commons.wikimedia.org/w/index.php?title=Vivitar&amp;action=edit&amp;redlink=1" class="new" title="Vivitar (page does not exist)">Vivitar</a> 55mm LIGHT GREEN-No. 11 (X1) JAPAN" (green)</li>
<li>"PRO 55Ø Y2 JAPAN" (yellow)</li>
<li>"HOYA 55Ø +2 JAPAN" (clear) screwed onto a "PRO 55Ø R2 JAPAN" (red)<br></li></ul>
<a href="https://en.wikipedia.org/wiki/User:Kallemax" class="extiw" title="en:User:Kallemax">en:User:Kallemax</a>
<a class="external free" href="https://en.wikipedia.org/wiki/Image:55mm_optical_filters.jpg">http://en.wikipedia.org/wiki/Image:55mm_optical_filters.jpg</a>