× Search
Our website is made possible by displaying online advertisements to our visitors.
Please consider supporting us by disabling your ad blocker.

Deals

News

Canon Patent Application: Some EF-M Zoom lenses
CanonNews
/ Categories: Canon Patents

Canon Patent Application: Some EF-M Zoom lenses

This patent application shows us some new formulas for some high zoom ratio lenses for the EF-M Mount.  Some of these are doubtful for various reasons, the least is that Canon already has an excellent 18-150mm lens for the EF-M mount.  Other embodiments such as the 18-200 or 15-130 are certainly possible for Canon to do for the EF-M mount.  Some of these such as the 15-130mm, in particular, could also be for Powershot, given the smaller image height at 15mm.

This patent specifically has to do with making lighter focus groups, thus faster to focus and preventing "wobble" in the auto focus especially for video.

zoom ratio 7.07 
focal length       18.52  48.97 130.97 
F number            3.61   4.90   5.88
Half angle of view 36.41  15.59   5.95 
image height       13.66  13.66  13.66 
total lens length 103.66 122.12 146.89 
BF                 10.98  25.64  38.43​

zoom ratio 7.08 
focal length       18.51  49.01 130.98 
F number            3.59   4.82   5.88 
Half angle of view 36.43  15.57   5.95 
Image height       13.66  13.66  13.66 
total lens length 104.31 122.72 148.15 
BF                 10.99  24.52  36.57

zoom ratio 7.07 
focal length       18.52  49.19 130.97 
F number            3.40   4.74   5.88 
half angle of view 36.42  15.52   5.95 
image height       13.66  13.66  13.66 
total lens length 103.61 121.85 146.78 
BF                 10.93  25.03  37.77

zoom ratio 10.48
Focal Length       18.51  59.64 193.98 
F Number            3.73   5.46   6.50 
Half Angle of View 36.43  12.90   4.03 
Image Height       13.66  13.66  13.66 
Total Lens Length 119.95 145.65 176.37 
BF                 13.43  31.04  44.18 

Zoom ratio 10.48 
focal length       18.51  59.97 193.99 
F number            3.52   5.14   6.45 
Half angle of view 36.43  12.83   4.03 
Image height       13.66  13.66  13.66 
Total Lens Length 115.66 144.95 181.92 
BF                 11.33  25.27  41.74 

Zoom ratio 7.07 
focal length       18.52  48.85 130.96 
F number            3.65   4.92   5.88 
Half angle of view 36.41  15.62   5.95 
Image height       13.66  13.66  13.66 
Lens length       122.24 146.75 103.58 
BF                 12.62  27.62  40.18 

Zoom ratio 8.45 
focal length       15.51  45.00 130.98 
F number            3.68   5.03   6.50 
Half angle of view 39.97  16.89   5.95 
Image height       13.00  13.66  13.66 
Total Lens Length 103.77 122.35 149.68 
BF                 12.76  23.92  35.17

Japan Patent Application 2018173487

Previous Article Canon EOS R vs Nikon Z7 - Misadventures in Usability
Next Article Canon Patent Application: Canon 360 degree camera
Print
blog comments powered by Disqus

Keep In Touch

FacebookTwitterLinkedIn

Camera Superstore - DigitalRev

Terms Of UsePrivacy Statement© 2018 by CanonNews. This site is not affiliated with Canon Inc. or it's subsidiaries.
Back To Top