what´s this?
- Thread starter jjanek
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John Shriver
Well-known
Hard to tell from that photo. But a few fungus spots are much less influence than a network of "cleaning marks" (scratches) on the front element.
The lens is new enough to be coated. But it's the soft Leica coating. So it's hit-or-miss as to whether professional cleaning will do more harm (lost coating) than good (removed fungus spots).
The lens is new enough to be coated. But it's the soft Leica coating. So it's hit-or-miss as to whether professional cleaning will do more harm (lost coating) than good (removed fungus spots).
le vrai rdu
Well-known
look like fungus to me 🙁
kinoglass
Established
The shape of the patterns is typical of de-cementing of two elements. There may be also other problems which are not obvious to see from the picture.
De-cementing can be addressed without having to separate the elements, clean and recement. A toaster oven set at its minimum heat for 30 minutes can reset the elements together. Wrap the lens on aluminum foil and keep it standing inside the toaster oven, well lebelled so that when the cement begins to soften the upper lens can set on its own weight over the matching element underneath.
Bring the oven up to heat together with lens and let it cool off in the oven so that there is no thermal chock. Minimum setting will approach 120 to 200 degrees Celcius in most toaster ovens.
I have done it many times with great success. It works best with old small lenses using Canadian balm as cement but failures have also occurred. Do it at your own risk. It is fun.
De-cementing can be addressed without having to separate the elements, clean and recement. A toaster oven set at its minimum heat for 30 minutes can reset the elements together. Wrap the lens on aluminum foil and keep it standing inside the toaster oven, well lebelled so that when the cement begins to soften the upper lens can set on its own weight over the matching element underneath.
Bring the oven up to heat together with lens and let it cool off in the oven so that there is no thermal chock. Minimum setting will approach 120 to 200 degrees Celcius in most toaster ovens.
I have done it many times with great success. It works best with old small lenses using Canadian balm as cement but failures have also occurred. Do it at your own risk. It is fun.
Juan Valdenebro
Truth is beauty
Baking Leica lenses... Mmmmmmmmm...
Not an every day menu!
Not an every day menu!
colyn
ישו משיח
You're playing a dangerous game here. This worked on older uncoated lens but should NEVER be tried with coated lens...
TheHub
Well-known
The spots in the middle just look like dirt. I have some on my Summarit (which just came back from cleaning.) Try shooting a few shots with it - my guess is it won't affect any photos.
