"Tom Phillips" wrote in message
om...
Can anyone describe what this bubble effect looks like,
what to look for if this were to be visible or be a problem?
The lens I'm looking at shows some fine hair-like or other
particles in the elements or along the edges when examining
a wide open aperture. I have always noticed very small
particles (flaking?) between Schneider lens elements but
never noticed an image issue.

Can you hold the lens a little closer here, Tom? I can't see it.

Fine lines are often fungus.