CanonNews / Thursday, November 15, 2018 / Categories: Canon Patents Canon Patent Application: High Zoom Ratio lenses for EF and RF This patent application contains embodiments for high zoom ratio lenses. Most of them are for EF mount, with large registration distances that are associated with the EF mount. However, there is two RF mount lens embodiments that slips in with 22.42 and 21.75mm back focus. Focal distance 35.04 152.85 350.37 F number 3.50 4.97 5.60 Field angle 30.36 8.05 3.53 Image height 20.53 21.61 21.61 length of the lens 321.17 321.17 321.17 BF 40.10 40.10 40.10 Focal distance 35.04 152.85 350.37 F number 3.50 4.97 5.60 Field angle 30.36 8.05 3.53 Image height 20.53 21.61 21.61 length of the lens 321.17 321.17 321.17 BF 40.10 40.10 40.10 Focal distance 35.13 160.38 386.45 F number 4.50 5.27 5.60 Field angle 30.30 7.67 3.20 Image height 20.53 21.61 21.61 length of the lens 362.82 362.82 362.82 BF 54.68 54.68 54.68 Focal distance 29.22 203.97 350.06 F number 2.80 4.36 4.50 Field angle 32.15 6.05 3.53 Image height 18.36 21.61 21.61 length of the lens 406.68 406.68 406.68 BF 22.42 22.42 22.42 Focal distance 25.20 125.05 294.41 F number 3.50 4.97 5.60 Field angle 36.72 9.80 4.20 Image height 18.80 21.61 21.61 length of the lens 374.08 374.08 374.08 BF 21.75 21.75 21.75 Japan Patent Application 2018-180203 Previous Article Deal of the Day: B&H Lighting deals - up to $1025 off Next Article Canon Patent Application: Irradiated Resin optical element Print 5172 Please enable JavaScript to view the comments powered by Disqus.blog comments powered by Disqus