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Topic: where are the 8mm experts??????
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Jake Mayes
Expert Film Handler
Posts: 119
From: Bath, UK
Registered: Sep 2012
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posted February 27, 2013 07:18 AM
Sounds like lens fungus to me as well. I am not very experienced with cleaning lenses, i am more into the chemical processes of said films and that sort of stuff, electronics, shooting and darkroom work, but if the lens can be disassembled easily (provided you have no way of returning the projector, or i would just return it without fiddling with it),
you could attempt to clean the inside and outside elements with a weak solvent and lens cleaning cloth, pure iso alcohol might be an idea, or i have had good results with surgical spirit (90% ethanol, 10% methanol or similar but you might remove special coatings that are present on many lenses if used neat, but if there is fungus you need to A. remove the fungus and B. Kill all spores that may be present, that a simple wipe will not do, so it has a chance of at least making the lens usable. I would dilute the surgical spirit with distilled water 50/50 if you are worried about coatings, that is a method i have found works very well, vodka would also work I am sure... I have never hurt a lens in this way. do not use acetone, that will cause damage to many plastics and coatings, i have tested acetone on junker lenses, unless it was just the way I applied it!
If a lens gets wet or damp, dry heat is a good way of drying (at least in my experience, my 35mm SLR lenses all get subjected to moisture extremes because of what I like to shoot sometimes. Do not leave them in a warm humid environment when wet, that is heaven to fungus. Leaving it in the sun can be a good idea if you catch it early as stated above, but that sounds too far gone! Or if you can get a replacement lens on the cheap, you could try that option as well.
'Lens cleaning fluid' from london camera exchange left horrible blotches on one of my 35mm prime lenses once!
I would personally return the projector though, lets hope it was not 'sold as seen' if it was stated as fully tested/inspected and working, you have grounds to return it due to lens fungus, sold as seen you wouldn't have much legs to stand on...
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