New Patent: Canon EF 50mm f/1.4 Lens
Canon has filed another new patent: Canon EF 50mm f/1.4 Lens. There have several new 50mm f/1.4 patents in the past few years. It seems that this new 50mm f/1.4 Lens has internal focus and an odd negative front element.
See the patent details below:
Patent Publication No. 2015-138121
- Published 2015.7.30
- Filing date 2014.1.22
Example 1
- Focal length 49.10
- F number 1.45
- Half angle (in degrees) 23.78
- Image height 21.64
- Overall length of the lens 100.16
- BF 38.10
Canon patents
- Positive ShiboTadashi
- Inner focus (part of the first group)
via: Egami
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