Canon patents for 14mm f/2.8, 300mm f/4, 28-300mm f/3.5-5.6 and 28-135mm f/4-5.6 lenses

Two new Canon patents from Japan: 2012-159720 is for a 14mm f/2.8 lens with anti-reflective coating.

The next patent 2012-159726 is for a 300mm f/4 lens.

Patent 2012-163746 is for a 28-300mm f/3.5-5.6 and 28-135mm f/4-5.6 lenses.

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