This diagram of the light path through Canon's newly-patented 400mm catadioptric lens shows how the mirrors help to 'fold' the light path and decrease the size of the lens. A new Canon lens patent out of Japan has been raising eyebrows around the photo community this week. The patent describes a 400mm F5.6 lens, which wouldn't necessarily be newsworthy... except that it's a catadioptric lens (also known as a 'mirror' or 'reflex' lens). Catadioptric lenses went 'out of style' so-to-speak many yea...
This diagram of the light path through Canon's newly-patented 400mm catadioptric lens shows how the mirrors help to 'fold' the light path and decrease the size of the lens. A new Canon lens patent out of Japan has been raising eyebrows around the photo community this week. The patent describes a 400mm F5.6 lens, which wouldn't necessarily be newsworthy... except that it's a catadioptric lens (also known as a 'mirror' or 'reflex' lens). Catadioptric lenses went 'out of style' so-to-speak many yea...
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