<H1>Canon Patents For New EOS-M Lenses</H1>

The Japanese Photography blog, Egami discovered a new patent filed by Canon that may be for new pancake lenses on the EOS-M system : 18-40mm f/3.5-5.6, 18-55mm f/4-8, 10-20mm f/4-5.6, and 9-18mm f/4-5.6.

Patent Publication No. 2014-6275

• Publication date 2014.1.16
• Filing date 2012.6.21

Example 1

• Zoom ratio 2.28
• Focal length f = 18.10-29.78-41.20mm
• Fno. 3.60-4.70-5.88
• Half angle ? = 36.92-24.55-18.27 °
• Image height Y = 13.60mm
• 54.22-49.85-51.81mm lens length
• BF 0.50mm

Example 7

• Zoom ratio 3.00
• Focal length f = 18.10-37.01-54.30mm
• Fno. 4.20-6.20-8.20
• Half angle ? = 36.92-20.17-14.06 °
• Image height Y = 13.60mm
• 64.74-56.63-62.13mm lens length
• BF 0.50mm

Example 8

• Zoom ratio 1.91
• Focal length f = 10.30-15.00-19.70mm
• Fno. 3.90-4.83-5.76
• Half angle ? = 52.98-42.31-34.74 °
• Image height Y = 13.66mm
• 58.84-53.45-52.25mm lens length
• BF 0.50mm

Example 10

• Zoom ratio 1.91
• Focal length f = 9.27-13.49-17.71mm
• Fno. 4.12-4.93-5.76
• Half angle ? = 55.84-45.36-37.65 °
• Image height Y = 13.66mm
• 60.98-55.27-53.91mm lens length
• BF 0.50mm

Canon patents

• The possible vibration damping by the second lens group
• Feeding whole, front focus, focusing, rear focusing, etc.

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