songcopy65
13.06.2021 18:03:05
Fungus is always bad news. Store your lenses properly, not in the steam room or basement.
See full version: Haze on backside of speedometer lens
Fungus is always bad news. Store your lenses properly, not in the steam room or basement.
Mild fungus can be cleaned by a real service facility. More serious cases, like the one shown here in ordinary light, etched the glass so deeply that Nikon returned the lens as "beyond repair." here
Look into the lens from the side, and the light makes even the smallest imperfections visible. more
This is why you need experience to make sense of what you'll see in a lens. here
I've avoided writing this article for 10 years because I know that once I do, everyone will start sending back lenses, just as people who know nothing about wine drive restaurateurs up the wall sending back perfectly good bottles of wine.
Amateurs worry too much about lens cleanliness. Look at the front of a real pro's lens in regular light, and half the time you'll see so much junk he hasn't cleaned off that you'd be amazed. more
The cornea is normally clear, so corneal haze can greatly impair your vision. Although the haze can occur in any part of the cornea, it is most often found in the thicker, middle layer of the cornea, called the stroma.
When corneal haze appears after surgery or other wounds, it will usually disappear as the eye heals. In more severe cases, a doctor may prescribe eye drops or other medication. The haze that develops following refractive surgery normally resolves after a few days, but sometimes takes up to six months. here
Corneal haze most often appears after trauma, infection, or surgery. It is usually caused by inflammatory cells and other debris that is activated inside the eye. more
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Hello,
the seller of a high quality used lens writes in the description of the condition of the item: there is a tiny bit of fog inside the lens which does not affect the image quality. What does this mean, and in case it is a handicap, can it be repaired (easily) ?
Gratefull for your coments.
Stefan
It may be a number of things. Fungus comes to mind. In my case the only way to really tell is to shine a light right through the lens and you'll see it. My Vivitar 105 2.5 had a bit of haze in it, which I suspect was the blade oils evaporating in a warm environment. I had the lens professionally cleaned b/c I do not have the expertise to open it up.
"Fog" can be many things particularly if the seller is not familiar with lenses. it might be condensation, oil, fungus, separating elements or a coating failing. Some of those are easy, some very hard or impossible to fix.
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