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.
Symptoms
- 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 |
Typical turnaround is 5 working days from arrival at our lab. Return shipping anywhere in the EU is a flat €20.
Ship your lens from anywhere in 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.
