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Canon Patent application: Lenses for APS-C compact cameras
This patent application has two lenses for compact cameras that are of APS-C in size. These would have to be compact cameras because the image circle at the wide end is not 13.66mm meaning some image stretching is occuring at the wide end. This happens occassionally in the powershot cameras.
Lens embodiments mentioned are:
focal length 18.21 50.49 85.95
F number 2.91 5.51 7.69
angle of view 31.59 15.14 9.03
image height 11.20 13.66 13.66
lens length 72.62 82.25 93.33
BF 3.86 3.86 3.86
focal length 17.86 49.71 102.44
F number 2.47 5.05 7.32
angle of view 32.10 15.36 7.60
image height 11.20 13.66 13.66
length 62.60 73.89 86.71
BF 3.94 3.94 3.94
Focal distance 15.21 52.83 102.65
F number 1.85 4.20 6.00
Field angle 36.19 14.50 7.58
Image height 11.13 13.66 13.66
length 83.84 101.55 121.52
BF 3.81 3.81 3.81
Japan Patent Application 2018-31935
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