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Canon Patent Application: Soft focus lenses
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Canon Patent Application: Soft focus lenses

This patent application is for a couple of soft focus lenses.  Again, with most patent applications, these will never see the light of day, but it's interesting to see what Canon is investigating.

The first embodiment is for a 16-50 F2.4 Canon EF-S lens

focal length       15.00 3 0.00  60.00 
F number            2.37   2.37   2.37 

Half angle of view 43.23  25.17  13.22 
Image height       14.10  14.10  14.10 
Lens total length 382.76 382.76 382.76 
BF                 45.29  45.29  45.29 

Another embodiment for a 35-100 2.8 Canon EF-S lens

focal length       35.00  60.01 100.01 
F number            2.80   2.80   2.80 
Half angle of view 23.95  14.53   8.84 
Image height       15.55  15.55  15.55 
Lens total length 269.06 269.06 269.06 
BF                 56.84  56.84  56.84

Japan Patent Application 2018-180132

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How to view Japan Patent applications.

Unfortunately, there's no direct way of linking to the patent application (sad!) however, this is the easiest process to view a japan patent or application.

  1. Go to the Japan Patent Office search page.
  2. If it's a patent application (they are usually in the format of Year-Number ie: 2017-011300) then type the patent application number into the second field down from the top where it says publication of patent application. 
  3. Click on search.
  4. Then click on the patent application number link, and there's the patent application!

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