Taking apart a camera lens to clean it

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I am so happy with how clean I was able to get it! Makes me less worried that the fungus will continue to spread. Cleaning fungus from the Sigma 150mm f2.8 macro lens.

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#sigma #photography #vintagelens

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The hardest part is wiping the lens clean

slavicprincess

I’ve got an 85mm lens that needs this on the rear of the front element. It was a good deal, but I’m not wild about it so will probably clean and sell. BTW, that whitening on your black rubber focus ring can also be cleaned, either with a clean dry brush (toothbrush, etc.), wiping with a very slightly dampened microfiber cloth (mild soap and water, hydrogen peroxide, or isopropyl all seem to work). I once tried to haggle a guy down because I said the whitening made the lens look old, he just cleaned it up before selling it and got his asking price :)

Lets-Take-Pictures

Two comments:
1. Cannot buy clear ammonia in Australia because they are scared it will be misused. You can only buy cloudy ammonia which means it has some soap mixed into it.
2. I like the use of hydrogen peroxide, quite clever to eat away at the biomass. I wouldn't have thought a weak acid and strong base would stay stable enough, but it looks like the two sit in a nice little sweet spot with their pKa so, cuddos.

I have 4 lenses that I bought 2nd hand and they all have this fungus in them. Thankyou for uploading.

HaydenHatTrick

Shouldn’t you also clean the plastic part that touches the lense?

hanslim

I'd be reluctant to do that with today's modern lenses due to the complex coatings on them. That mixture of NH3 and H2O2 could damage the coatings then you'd ruin an expensive lens.

dps

I have an efm 15 to 45 experiencing the same issue..have to get mines clean... awesome vid dude

TheUrbandilema

This point, I'm about to make is one of most important. Before removing any lens element from a lens take into consideration, 1 it must be replaced exactly as it was, meaning a mark or piece of sticky tape on the lens outside surface to re align its orientation when re assembled. So let's say for example you place a sticker on the front element at the top in relation to being mounted on the camera.Then when re assembling, make sure the sticker is at the top when returned .If not done this way .Your perfectly clean element is now decentering your lens .as accurate as you may think these units are made they are culminated and balanced to project a perfectly cantered left to right up and down projected image before passing qc.Its easy to warm the tape from the outer element after assembly and clean with reccomended fluid such as lighter fluid, which I reccomend .50 years tinkering makes life a great classroom, but never a courtroom .Good video .we're all still learning .

brotherdom

Sunlight also surprisingly works wonders

TreacherousFennec

you should also mention that using Sun light rays directly on the lens also helps but that's a very slow process.

MoroccanTelephoto

Just did this 50/50 mix with all 10 optical surfaces of a heavily infested SMC Takumar 1:1.8/55, but did it in a cheap ultrasonic jewelry cleaner. Seemed to work great. Fungus is gone, but it had been there long enough to leave micro-irregularities in the surfaces. But the lens is much better now than it was. The hardest part was wondering why that one part wasn't fitting right (to only remember, oh yeah, that's NOT how it goes).

brysonjacobs

I have a nikon 70-200 2.8 with mold on every element. Bought it cheap that way. Was going to clean it but MY GOD does it make a really awesome bokeh effect.... so I just leave it like that 🤣

Odinthesleepy

Store them with silica gel water absorbers.

Ipsissimus

I buy and rebuild a ton of vintage lenses...some of them with extremely severe fungus growth in them.
I've found that just 5 min in higher concentration hydrogen peroxide works great.
Don't need the ammonia.
Final clean with Zeiss lens cleaner.
If you have fully sealed lenses or even if you take an older non_sealed lens (depending on the design) and add o-rings to seal it, you can reassemble it in a nitrogen purge box and avoid any optical changes in more extreme temperatures and fungus won't grow in it ever again unless the seals fail.

ManualFocusJunkie

What started to me as a fun side project (adapting a Mamiya Sekor 38mm f/2.8 from a Mamiya 135 ee on a Sony E mount camera) made end up here, looking on how to clean fungus on a lens and also the internal segments because they appear to have stains of something as well (it's a 47 year old lens from a camera that belonged to my grandmother, it surprised me that it was not worse than it actually is)

Cez-ario

This is like my film photography youtube channel because not only do they both feature camera lenses, but my channel is also growing fungus from the stagnation in viewership

nicklopro