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New patent application for 18-200 zoom for APS-C cameras
The 18-200mm is becoming long in the tooth for the EF-S lens lineup. Most of the other lenses have been STM'ed and improved by now, sans this one.
This patent is for improved optical performance on large zoom ratio lenses and has the following characteristics embodied;
Zoom ratio 10.38
Wide angle Middle Looking far
Focal distance 18.60 49.08 193.00
F number 3.59 4.89 5.88
Field angle 36.29 15.55 4.05
Image height 13.66 13.66 13.66
length of the lens 145.04 172.07 200.21
BF 38.23 59.69 74.12
Japan Patent Application 2017-219655
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