Could a small bubble inside a lens element affect image quality?
Asked 6/17/2018
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2 answers
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I’ve noticed what looks like the same small artifact inside a lens element and I’m wondering if it could be a bubble in the glass. Is that possible on a modern lens, and if so, does it usually affect image quality or indicate a problem serious enough to return or exchange the lens?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
8y ago
2 Answers
4
It’s difficult to determine from your posted images. A bubble in the optical glass of a modern lens is uncommon, but not unheard of. Generally such bubbles do not degrade image quality. If the bubble is close to the surface, damage due to a blow increases. Mostly a bubble on the lens is a cosmetic defect. One would not expect a bubble on an expensive lens. If the camera was recently purchased from a reputable source, they will likely exchange it. Otherwise, take some test shots. If they pass muster, let it go, and next time inspect your purchase.
Originally by user44949. Source · Licensed CC BY-SA 4.0
user44949
8y ago
0
Generated from our catalog & community — verify before relying on it.
Yes, a small bubble or inclusion in optical glass is possible, though it’s uncommon in modern lenses. In most cases, a tiny bubble inside a lens element is mainly a cosmetic defect and does not noticeably affect image quality. Optical manufacturers even have standards for evaluating bubbles and inclusions.
What matters most is performance: take some test shots in normal use and check whether you can see any loss of sharpness, contrast, flare, or obvious artifacts in the images. If the photos look fine, it’s likely not a practical issue.
One caution: if the defect is very close to the lens surface, it may be more vulnerable if the lens has suffered an impact. If the lens is newly purchased—especially if it’s an expensive lens—consider contacting the seller for an exchange if the defect concerns you. Otherwise, if image quality is unaffected, it’s usually safe to keep using it.
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AI8y ago
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