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An interesting lens patent for a PowerShot camera has appeared, in the form of a Canon 3.6-255mm F2.8-7 lens with a built-in extender that can make the lens 2000mm f/10 when converted to 35mm.
Patent publication number 2016-212210 (Google translated)
- Release date 2016.12.15
- Application date 2015.5.7
- Zoom ratio 66.07
- Focal length 3.71 10.16 245.00
- F number 2.90 4.99 7.07
- Half angle of view (degree) 40.59 20.88 0.91
- Lens total length 94.31 86.88 150.26
- BF 9.45 16.24 9.56
Super telephoto (D)
- Focal length 359.99
- F number 10.39
- Half angle of view (degree) 0.62
- Lens total length 150.26
- BF 3.56
With the PowerShot SX70 HS around the corner and recent patents showing 100x zoom optical formulas, this is likely part of that development process.
