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Canon patent for EF 50 f/1.4 USM
- Patent Publication No. 2011-70032
- Published 2011.4.7
- Filled 2009.9.25
Specifications
- Focal Distance: 51.70
- Fno: 1.30
- Half angle of view: 22.79
- Image Height: 21.64
- Lens Length (mm): 98
- Back Focus (mm): 37.5
- Aspherical: 2
The current 50 f/1.4 , while a bargain, is definitely due for a replacement.
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