How do you clean a DSLR lens
how would you clean a digital slr lens
that has fungus in it?
i love the part you have on taking a banana apart.
Fungus is definitely not a fun thing to deal with on a lens. There are a couple things that need to be settled before you continue. First, is the fungus on the inside or outside of the lens? Fungus on the outside is pretty easy to deal with, while fungus inside the lens might not be so fun. Next, if the fungus is on the inside, is it a zoom or fixed focal length lens? Zoom lenses have a lot of moving parts and will be very difficult to navigate if you have to open it up.
Anywho, here's how you're going to want to tackle fungus. A solution of equal parts hydrogen peroxide and ammonia applied with a soft cotton swab should kill and remove the fungus, but be sure to work in a well-ventilated area and wear a face mask of some sort. After using the solution, use a microfiber cloth dampened with lens cleaning solution (not the peroxide/ammonia) to wipe off the lens. If you have to open the lens things could get a lot more complicated, and you may consider sending it in to a professional cleaning shop like this one.
If you don't mind me asking, what lens is it that you're trying to remove fungus from? An inexpensive prime lens may be worth it to try and fix yourself, but a high-end zoom lens might be better suited for a professional.
I bought a heavily infected Zeiss lens without any coating. I put it under an UV lamp (made for killing algae in a garden pond for a few days. Funghi was gone afterwards - I could not even detect any marks or hints on the infection. I kept that lens aside of other lenses - but even a couple of month later it was clean inside.
Do not know if this technique would work with modern multi-coated lenses. I would expect that maybe not enough UV radiation reaches the inner parts of the lens or that the funghi may leaves marks on the coating.
You need a jeweller's screw driver set as the screws have a special set angle , these screw drivers are close enough to the right ones, or a set can be purchased from an electronics store. You have to take note of the order and most importantly the position of the barrel screw position in relation to the rest of the lens assembly. Once you have removed all the accessable screws ( you may also find you have to prise out the plastic ferrel from the front of the lens to expose the screws). Now you can take apart the lens and unscrew the barrel ( may be left or right hand thread. Once apart use opticians cleaning fluid, available from all eyeglass suppliers. In most cases this will be sufficient to clean fungus, if not you will have to resort to powerful solutions of hydrogen peroxide and ammonia. Which is in my opinion is when you should probably get it professionally cleaned.