</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (JHannon @ Sep 11 2002, 01:20 AM)</td></tr><tr><td id='QUOTE'>Robert, I use an old adjustable filter holder made by Kodak. It is spring loaded, designed to take the 3" wratten filters and clamps to the lens. It is old, probably not made anymore but may still be found used in camera stores.. Lee also makes a cheap 3"/4" filter holder for lenses up to 82mm, I think it is $37 at B&H.</td></tr></table><span id='postcolor'>
I use a similar system, if not exactly the same. It's made by calumet and is still available.
After trying several different approaches, this seems to be the best for my needs. It fits all of my lenses with the exception of my 250mm Wide Field Ektar, who's diameter is too large for this spring system. In that case, 4 loops of masking tape behind the lens work just fine.