Does cleaning solutions deteriorate lens/filter coatings?

Started Mar 9, 2013 | Questions thread
OpticsEngineer Veteran Member • Posts: 6,387
one time you should clean

All the comments before about dust, etc generally not mattering are correct.

But I did have a situation on my Canon SX260 that I was getting a bright disc dead center in the pictures if the sun was anywhere within 90 degrees of the direction I was pointing the camera. It was particulary disturbing when I was taking pictures of my black dog. It had me confused for a while because I am so used to thinking that we rarely see problems with dirty lenses. But in this case, a cleaning was needed and it cleared up the problem. So that is something to remember.

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