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Nikon
18-200mm Lateral Chromatic Aberration (LCA) (What is LCA?) LCA is called "purple fringing" by hobbyists. The Nikon 18-200mm is free from visible LCA except at the very ends of the zoom range. You can fix it with PhotoShop CS2's Lens Correction Filter. 18 mm: Moderate. Try a setting of +10 to +14 under "Red/Cyan" in CS2's Lens Correction Filter. Also try +5 for Red/Cyan and -6 for Blue/Yellow or just -12 for Blue/Yellow. See what works for you. 24 mm: Minimal. Leave it alone, or set Blue/Yellow to -5. 35 mm: None. 50 mm: None. 70 mm: None. 105 mm: None. 135 mm: None. 200 mm: Negligible secondary (green/magenta). Leave it alone or try +7 under Blue/Yellow. |