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From 29-Jul-2021, after the 80mm f/15 objective lens interior air-spaced surfaces were cleaned of fungus also, as described in my post here: https://www.cloudyni...6#entry11257860. It's interesting to compare this "after" photo (with brighter incident light) seen full-size to this "before" photo (in normal room light) shown earlier in this same album: https://www.cloudyni...7082_349451.jpg

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