I've had a Linhof multifocal optical viewfinder for 20 or so years. I've never used it on camera but have come to use it more for previewing a scene to determine which focal length lens I might decide to use. The problem is that the rotating ring for determining the lens focal length has become extremely stiff to turn, especially as I turn it clockwise towards the wider 90mm setting. Not sure what the reason is, possibly old dried lubricant. I'd like to know if I can somehow lubricate this, partially disassemble it though I'm not keen to try that. So I thought I would reach out for thoughts and advice.
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