Enlarging lenses are pretty simple to take apart. There is usually a front cell and a rear cell that contain two or three lenses each. Just be sure you use a proper spanner to the remove the cells and then disassemble each cell using the spanner as well. The retaining rings have unusually small slots and are usually made of a soft metal so it is super easy to chew up a retaining ring. Once you open up a lens and clean it you will see how simple they are.
The hard part is getting them back together without getting dust/lint/fingerprints etc. inside if you don't use a laminar flow bench. Dust Off does help but somehow there is always a little piece of something left inside! I am somewhat of a perfectionist though and it has to be clean; however, a tiny bit of dust usually does not affect performance. I use a lens suction cup tool to handle the lenses on re-assembly to avoid fingerprints.
Last hint: work over a soft cloth. Think how you're going to feel when one of the lens elements falls off onto the tile floor and chips an edge.
Last edited by Fred Aspen; 12-03-2012 at 10:26 AM. Click to view previous post history.