How do I remove dried water or condensation spots from the front element of my lens?
Asked 10/13/2021
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I have an EF-S 18-200mm lens with spots on the outside of the front element. They are not scratches and look more like dried water droplets or condensation marks. I have tried common cleaning methods shown online, but the marks remain. What is the safest way to clean this kind of residue from a coated lens, and how can I tell if the marks are permanent coating damage rather than dirt?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
4y ago
2 Answers
1
They look as if some liquid splashed over it, so you need an alcohol-based cleaning solution. There are some premoistened Lens Cleaning Wipes on amazon. Read the reviews before buying a specific brand. Just be sure they can be used on coated lenses.
But wait for other responses, I am sure someone will tell you the specific type of alcohol needed.
Additional note. There are different types of microfibers. Use one specific for lenses, they are the ones really smooth in texture.
There are other types that have a towel look. Do not use those on a coated lens.
Originally by user37321. Source · Licensed CC BY-SA 4.0
user37321
4y ago
0
Generated from our catalog & community — verify before relying on it.
Start with the least-contact cleaning method and work up. First remove any loose dust with a blower or soft lens brush so you do not grind grit into the front element. Then use a cleaner made for coated camera lenses—such as lens cleaning wipes or a proper lens-cleaning fluid—with a lens-safe microfiber cloth or disposable lens wipes. Avoid household cloths; use only cloths intended for lenses.
If the spots are dried water or splash residue, an alcohol-based lens cleaner may remove them. Apply gently and do not scrub hard. A LensPen or quality premoistened lens wipes are also commonly used.
If proper lens cleaner does not affect the marks, the front coating may be permanently damaged rather than dirty. In that case, additional rubbing is unlikely to help and could make things worse, so professional service would be the next step.
For prevention, many photographers fit a clear/UV protective filter so future splash marks or damage affect the filter rather than the lens itself.
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AI4y ago
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