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How to disassemble a Makinon mc zoom lens

How to disassemble it and clean the internal fungal marks.

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First off, you need special tools to get at the inner elements of a zoom lens - i've been working on lenses for 20 years, and i still don't have every tool needed sometimes :-)

second, makinon lenses are not really worth anything, even if they are in perfect condition - my advice is to buy a better zoom used that is in perfect condition already, since you would have spent that money in tools to try and clean this one, and everyone screws up the first lens they ever try to take apart...

some good lens brand names are sigma, tamron, kiron or any with the same camera name as your camera (canon, nikon, etc)

stick with japan made optics - can't go wrong usually.

good luck...

Posted on Jan 21, 2015

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Posted on Jan 02, 2017

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SOURCE: tokina 35-300mm af zoom lens

Unless you have extensive experience, this is best left to professionals. If you didn't spend much, then you could "learn" on it, but if it is something you really value...don't do it.

Posted on Nov 03, 2007

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I have a Kodak Ektanar 4 to 6 inch zoom lens and when you look through the lens from the front the inner lens looks cloudy. Is this normal, and if not, can the lens be taken apart and cleaned?

I would not expect a lens to be cloudy. Most lenses can be cleaned internally, but it's not a job to try yourself. You really need a full "optical bench" as well as tools for disassembly, cleaning, alignment, etc.

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Sticky zoom ring on a Nikkor 18-55 AF-S Zoom. The zoom gets jerky at the 18-24 mark. I think it needs some lube but I don't know where to put it?

You would have to disassemble the lens barrel to get to the zoom sliders, and lubrication is not likely the problem anyway. The zoom mechanism uses nylon bushings sliding in a groove, and zoom problems are usually due to wearing/cracking of those bushings.

If it's still in warranty, send it in. Otherwise, the cost of repair probably exceeds the value of the lens. Sorry.

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Tamron AF 18-200MM XR Di II LD dust inside; how do I clean?

Dust and other small debris is drawn into the lens due to the vacuum created when zooming in. You can reduce the chances of drawing in dust and debris by slowly zooming in as opposed to rapidly zooming in.

Now that you how it gets in and how to help prevent it from getting in again, comes the bad news. There's really no way to disassemble the lens to clean it up at home. These are precision optics with many small moving parts that really need to be serviced in a dust free environment. You best bet it to contact Tamron (or authorized servicer) to learn how much it will cost to be cleaned by them. This will keep the warranty (if any) intact, too.

Good luck!

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Canon 17-85 IS zoom ring locked at 17mm.

Sometimes, if that lens has heavy use or if it has been traveled with a lot, several of the internal zoom screws may come loose deep inside the lens and cause the zoom to freeze. It requires a complete disassembly of the lens to reach the screws and re-seal them so it does not happen again.
Bob Kilbourn

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When you open my olympus the image is blurred ( malabo) and when you pressed the zoom button the camera turns off

Af steeper motor locked and cant execute internal program.Molehill maybee?Disassembly carefully ,disconnect lens unit from main remove and find the gears of af motor,clean .

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How to remove internal fungi on lens groups

Sorry, but it's impossible to do without major disassembly requiring special tools and skills. Reassembly also requires the lens to be collimated as the lens groups are being refitted..

If you get the work done professionally, it will far exceed the cost of a replacement lens.

In any case, there are various types of fungal attack. Some feed only on the lubricants and lens cements inside the lens and can be removed during disassembly, but unless all parts are irradiated the spores will re-grow very quickly. Other types of fungal attack actually damage the lens multicoatings and some fungi attack the adhesive between optical groupings. These cannot effectively be cleaned off without leaving permanent damage and once again there is the risk of re-infestation. It's for this reason alone that many lens repairers will not accept such lenses for repair and there is also a slight (but unproven) risk of cross infection from one lens to another.

One solution which seems to be effective with some lens fungi (in my experience at least) is to expose them to UV light. This is achieved simply by leaving the lens outside on a few dry days without the lens cap on. Direct sunlight is best avoided, and if the lens is under glass then it will take longer as even regular window panes block much of the UV from the sun.

Preventing lens fungus is the best solution of all: never store lenses away unless thoroughly dry, so if they've been exposed to moisture or have had condensation on them then leave them somewhere dry and well ventilated before storage. Silica gel sachets in the camera bag also help, but don't forget to change them periodically.

Although this is probably not the answer you hoped for it also means that you have absolutely nothing to lose by trying to dismantle your lens anyway if the UV method fails. If you can get to the fungi directly then acetone seems effective at removing it but can attack the structural components of the lens, so go easy with it. I cannot provide you with any useful schematics as they're all copyright material and not legally available for free in the public domain.

Good luck, I hope you manage to use this information to arrive at a decision about what to do with your lens. Please take a moment to rate the free answer I have provided for you and any testimonial which you might wish to add is always welcome!

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I have a Nikon D90 with 18-105mm lens. I lived in Bangladesh. FUNGAL spot apears on my lens. Humidity here in Bangladesh is very high. May be that was the reason of Fungal attach. How can I clean the...

If it's inbetween the lens elements, there's no way you can get at it. It would have to be taken apart by a service facility recommended by the manufacturer.

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Zoom does not work since I dropped my lens

not worth the effort - these are very complicated internal workings and even if you managed to disassemble the glass it would be difficult to know what is damaged without a 1:1 drawing of the internals of that specific piece of glass - plus you do not have a clean room - not trying to comment on your housekeeping but a dedicated clean room with a laminar flow work bench to keep out the FM you would add just by opening up said glass in a normal room - Pay the money if you love the glass - if not they make interesting and fun paperweights...

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There is a tarnish to the eye of the lens Sigma Zoom 20-200mm

From your picture it is impossible to tell if the blemish is on the rear element or internal. The first thing I would do is clean the external lens surfaces then take some pictures. You may find that the blemish has no effect on picture quality. If that is the case, I would do nothing.

If it does affect your photographs, you will need to take it to a camera repair man. What ever you do, do not attempt to disassemble the lens yourself. You will not be able to get it back together and only add to the cost of repair. As far as cost, that is up to the camera repair man you choose. Without looking at the lens, he will not be able to give you an estimate. Check the cost of repair against the replacement value of the lens on E-bay and then make your decision.

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The cobweb marks are either
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2. Fungal growth inside the lens barrel.
As to usability-
It is surprising what one can away with glass damage - scratches and the like
All you can do is to try it and see

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