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Canon EF 600mm f/4 BR DO prototype shown at Canon Expo 2015

Canon EF 600mm F/4 BR DO Prototype Shown At Canon Expo 2015

Canon prototype gear on show at Canon Expo 2015 in NYC. After having posted a picture of the 120MP DSLR prototype, Popular Photography Magazine posted another picture. The EF 600mm BR DO is on display, a “semi-working version”. A patent for such a lens showed up back in July.

The BR stays for Blue Spectrum Refractive Optics, a technology Canon announced in August. BR corrects chromatic aberrations. The technology will be seen first on the Canon EF 35mm f/1.4L II.

The image below shows how the lens will look when finalised.

canon 60mm BR DO

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