Nikon 28-70mm f/2.8 Lens Fungus Cleaning Service
Fungus inside a Nikon AF-S 28-70mm f/2.8 ED. We disassemble the lens completely, clean every affected optical group and finish with a UV chamber treatment so the fungus cannot return.
Symptom checklist
- Spider-web or thread-like patterns inside the lens
- Hazy patches on internal elements that won't wipe off
- Low contrast and veiling flare in photos
- Fungus visible when shining a light through the lens
Nikon 28-70 fungus cleaning is one of the most common requests we get for this professional zoom: the AF-S 28-70mm f/2.8 ED is old enough now that examples stored in humid conditions develop fungus on the internal elements. The problem is fully repairable at a fixed price — we disassemble the lens completely, clean every affected group and treat the lens in a UV chamber so the fungus does not come back.
The symptoms
- Thread-like or spider-web patterns visible on internal glass surfaces, easiest to spot by shining a light through the lens.
- Hazy patches that no external cleaning can reach.
- In photos: reduced contrast, veiling flare and a soft, low-bite rendering — most noticeable shooting against the light.
What causes it
Lens fungus is a living organism. Its spores are present everywhere; they germinate when a lens is stored with humidity, darkness and still air — a camera bag in a cellar is the classic incubator. Once started, the growth spreads across internal surfaces where no cloth can reach. This is not a design flaw of the 28-70mm f/2.8: any lens of this age stored in the wrong conditions can develop it. The critical point is that the visible growth is only part of the problem — invisible spores remain even after the surfaces look clean.
Can you fix it yourself?
You can prevent it — store lenses in a dry, ventilated, occasionally sunlit place — but you cannot cure it. The affected surfaces are internal, so reaching them means fully disassembling a complex professional zoom, and even a perfect wipe-down leaves the spores alive. Without a proper spore treatment, the fungus routinely returns within months. Our advice: do not open the lens; have it cleaned properly once, and store it better afterwards.
How we repair it
A customer contacted us to have his fungus-affected Nikon 28-70mm cleaned. Our technicians disassembled the lens completely, and every optical group touched by fungus was cleaned with a cloth soaked in isopropyl alcohol until all trace of the growth was eliminated.
The final step is the one that makes the repair last: the lens went through our UV chamber, which destroys all remaining spores — including the invisible ones. This ultraviolet treatment is essential: lenses with front or internal fungus that skip it can see the problem reappear within a few months, whereas the UV chamber rules that out completely. After reassembly and our standard functional check, the lens went back to its owner in like-new condition. You can find our full range of Nikon services on our Nikon repairs page.
Price and turnaround
| Service | Price |
|---|---|
| Full disassembly, fungus cleaning + UV chamber treatment | €350 (fixed) |
| Internal cleaning | Included |
| Final test & general check | Included |
The turnaround shown above is typical for this repair; your exact timing is confirmed in the free written quote and can vary with parts availability. Return shipping is a flat €20 by UPS to most EU destinations. Return shipping most of the EU is a flat €20.
Ship your lens from most of the EU — diagnosis is free and every repair is covered by a 6-month warranty. See how it works.
Frequently asked questions
What does fungus look like inside a Nikon 28-70?
Fine thread-like or spider-web growth on internal glass surfaces, often with a hazy halo. Shine a torch through the lens and it stands out clearly from ordinary dust.
Can lens fungus come back after cleaning?
It can — if only the visible growth is removed, invisible spores survive and the fungus can reappear within a few months. That is why our Nikon 28-70 fungus cleaning always ends with a UV chamber treatment that eliminates the spores completely.
How much does it cost to clean fungus from a Nikon 28-70mm f/2.8?
The complete service — full disassembly, cleaning of all affected optical groups, UV chamber treatment and final check — is €350, fixed.
Is it worth cleaning fungus from an AF-S 28-70mm f/2.8?
Yes. The "Beast" is a professional-grade zoom that still performs superbly, and fungus caught in time cleans off completely. Left untreated, it spreads and can eventually mark the coatings.
Is this your fault? Ask about this repair
Tell us what is happening and we will reply with a first assessment and explain the next step. The binding quote is issued after inspection. Diagnosis is free and you are not committing to anything — no shipping details needed yet.
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