Canon
Canon EF 17-40mm f/4 L USM lens disassembly
Canon EF 17-40mm f/4 L USM lens disassembly
#Canon #1740mm #USM #lens #disassembly
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This video is about the disassembly of the Canon EF 17-40mm f/4 L USM lens. There was dust and fungus inside the lens, so I …
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