Will it have a V-filter? The LSST..... full story: http://www.cbc.ca/technology/story/2008/01/04/tech-telescope.html rick -- * * * * * * * * * * * * * Richard Huziak Manufacturing Engineering SED Systems Saskatoon, SK, Canada tel. (306) 933-1676 <huziak at SEDSystems.ca> * * * * * * * * * * * * *