Canon patents new 300mm f/4 lens

• 13 years ago
• Categories: Canon
• Tags: Patents

Canon filed a patent in Japan for a new 300mm f/4 lens:

For comparison, here is the current Canon EF300mm F4L IS USM design (1997):

Patent details:

• Patent Publication: 2011-27864
• Release date: 02/10/ 2011
• Filing date: 07/23/2009
• Focal length: 294.00mm
• Aperture: 4.14
• Angle of view: 8.24°
• Image circle: 43.28mm
• Total lens length: 245.03mm
• Back focus: 86.14mm

Via Egami