Jbennett68
Well-known
How difficult is it to remove the elements on this lens for cleaning? I think I have the appropriate tools but experience not so much.
90mm collapsible elmar haze.
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Duofold RF
Well-known
The optical unit is secured by a set screw on the side. Unscrewing the set screw allows the optical unit to be removed from the focus unit.
The rear element can be unscrewed from the back, and the front black metal ring can be unscrewed using a rubber tool (such as a lens wrench or rubber grip).
The optical unit is relatively easy to clean, but the focus unit is not—it features a very complex design.
The rear element can be unscrewed from the back, and the front black metal ring can be unscrewed using a rubber tool (such as a lens wrench or rubber grip).
The optical unit is relatively easy to clean, but the focus unit is not—it features a very complex design.
Jbennett68
Well-known
Does the front element just screw out ccw with a spanner?
Duofold RF
Well-known
There should be two small hoes on the ring. This is a Tessar type lens, if the haze is the cemented unit, it will be difficult to clean. Good luck.
Valkir1987
Well-known
Just a tip. When the haze sits on the coating. One cause is oil that migrates from the helical grease, another is mould. If the oil sits there for a long time, it becomes resin like. An Isobutane cleaner for solder flux can do the trick if normal lens cleaning liquids fail. Make sure you use an extractor to avoid breathing any fumes. I had succes cleaning haze out of Meyer Oreston 100mm lenses. Be careful though, because lens elements can be cemented with canada balsam resin.
