Tag Archives: EF 180mm f/3.5L

Canon Patent For 180mm f/3.5 DO Macro Lens


Egami spotted a new patent filed by Canon. The patent describes diffractive optical (DO) lens of the 180mm f/3.5 macro lens. Canon lenses which feature the diffractive optical (DO) are smaller and lighter compared to the same focal length lenses but the price becomes generally higher when the lenses have optical formual for DO. Canon currently sells EFContinue Reading