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Thursday, 19 May 2016

See inside Canon's EF 200-400mm lens

See what's deep inside the EF200-400mm F4L IS USM Extender 1.4x. Made up of hundreds of precise mechanical and optical parts, the EF200-400mm F4L IS USM Extender 1.4x is a super telephoto lens that opened up new possibilities for professionals on the front line of sports, nature and news photography. In this YouTube video Canon unveils the precise inner construction of this L lens that has not been visualised before.
https://www.youtube.com/watch?v=xQp_0b2umto


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