Canon EF 100-400 f/4-5.6L IS Patent
We've previously shown a 100-400 in a patent, and it appears a second patent for nearly the same optical formula has come about.
- Focal length f = 102.20 – 390.01mm
- Fno. 4.10 – 5.90
- Half angle of 11.95 – 3.18 °
- Image height 21.64mm
- Lens Length 228.18 – 288.12mm
- Back Focus 51.23 – 69.84mm
- 3.82x zoom ratio
- Lens Construction 14 group of 19 images
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