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Cleaning refractor lenses
Picked up an old refractor yesterday, but it has promise. Lenses are great, BUT...
Between the 2 objectives, there is a foggy layer with lint - so someone has cleaned it.
I tried water and a little Sunlight dishsoap,but not much better. Seems like a fine machine oil or something over the lens. Was thinking trying isopropyl alcohol swabs/swipes?
How do they get an immaculate interface between lenses in the factory?
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