Can I remove dust from inside a zoom lens, and how can I reduce more dust getting in?
Asked 12/24/2014
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I’ve noticed several dust specks inside my Tamron 18-270 zoom lens, including one on the inner side of the front element. I understand that internal dust usually has little effect on image quality, but I’d still like to know whether there is a safe way to remove it and whether zooming really pulls dust into the lens. Is this something I can clean myself, or should it be serviced? Also, are there practical ways to reduce future dust buildup inside a zoom lens?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
2 Answers
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Unfortunately dust in our lenses is something photographers have to live with. By using the equipment and zooming in/out and focusing dust will find it's way into even the most weathers sealed and expensive lenses. Fortunately getting dust inside the lens doesn't matter much in regards to image quality (read this article and find out yourself).
Even though you might think that a noticeable spec on the outer element of the lens would show up on the image, it most likely won't (unless you're using a very small aperture and the spec is close to the center). By trying to clean the lens from dust chances are that you'll actually damage the lenses and cause a problem when there where none to begin with.
If you really want to get rid of the dust you should have it serviced. I would strongly object to that however since the "problem" is a non-issue and your lens is a rather cheap zoom lens and it would be a huge waste of money.
Originally by user21986. Source · Licensed CC BY-SA 4.0
user21986
11y ago
0
Generated from our catalog & community — verify before relying on it.
A little internal dust is normal, especially in zoom lenses, which can move air as they zoom and focus. In most cases it has little to no visible effect on image quality, even when the speck looks obvious while inspecting the lens.
The main caution: don’t try to open or clean inside the lens yourself. DIY internal cleaning is far more likely to scratch glass, damage coatings, misalign elements, or introduce more dust than to solve anything. If the dust truly bothers you, the proper fix is professional lens servicing.
As for prevention, you usually can’t stop internal dust completely. Even well-sealed lenses can accumulate some over time with normal use. What you can do is minimize exposure: avoid changing lenses or operating gear in dusty environments when possible, keep the exterior clean, use caps when stored, and store equipment in a reasonably clean, dry place.
So the practical answer is: live with small amounts of internal dust unless you see a real image problem, and use professional service if you want it removed safely.
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