This beautiful pattern i've found in a old Canon lens is a phenomenon called balsam separation. Some lens elements are glued together with canada balsam, which is a kind of totally transparent
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What Is Balsam Separation And Can A Lens Be Repaired?
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One way to fix lens separation
Repair: “Shneideritis” & Edge Separation | Richard Haw's Classic Nikon Repair and Review
This beautiful pattern i've found in a old Canon lens is a phenomenon called balsam separation. Some lens elements are glued together with canada balm, which is a kind of totally transparent
What am i looking at here? Is this balsam separation or haze or something else entirely? : r/AnalogCommunity
Is this separation? Or something else?: Adapted Lens Talk Forum: Digital Photography Review
Don't get your lens HOT! Balsam Separation in lenses, not to be confused with Fungus - YouTube
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Asahi Pentax-M 50mm f1.4 Lens Haze with Balsam Separation Suspected, Repairing... - PentaxForums.com
Canon FL 50mm F1.8 II (JT Full Overhaul) 1 - BALSAM SEPARATED - JPY3,000 : Japan-Tool Online Shopping Cart
