Hi, I recently purchased a used Sinaron SE 300mm/5.6 in Copal #3. After a closer look under a lamp, it become obvious that there is enough dust between lens elements in the frontal half of the lens (have no idea how they got there, it must be that one of the previous owners disassembled the lens for a somewhat reason).
Should I try to disassemble and clean it, or better send to a service? What are the risks to DIY? As I live in Switzerland, should I try contact Sinar (although the lens was manufactured by Rodenstock, of course), or anybody can suggest a better service?
Thanks a lot for your answers,
Dmitri.
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