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Thursday, March 10, 2016

Canon Blue Spectrum Refractive Optics Explained

Canon introduced Blue Spectrum Refractive Optics technology with the EF 35mm f/1.4L II lens last year. I expect more EF lens coming this year will have that technology. The one lens I am most interested in is the EF 600mm f/4 DO BR lens, which made its debut at the Canon Expo 2015 Show in New York City.

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