× Search
Another super-telephoto diffractive optic patent
/ Categories: Canon Patents
This post may contain affiliate links(s). An affiliate link means I may earn advertising/referral fees if you make a purchase through my link, without any additional cost to you. It helps to keep this site afloat. Thank you in advance for your support. If you like what we do here, maybe buy me a coffee.

Another super-telephoto diffractive optic patent

This patent deals with joining an aspherical element with a DO element group.

In this patent is listed embodiments for a 300 2.8 IS DO and another 400 4.0 IS DO.

Canon continues to work on improving the diffractive optical super telephotos, and maybe just maybe we'll see a 300mm DO similar to what Nikon has come out with.

Read more US Patent Application 20170168269


Previous Article Canon 135mm 2.0L IS USM (and others!) Patent Application
Next Article A bunch of Mirrorless lenses in this patent application
blog comments powered by Disqus

Keep In Touch


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!

Our Preferred Sponsors

Want to buy me a coffee?

Free Shipping to the USA and Canada*

Use CANONNEWS for $10 off AuroraHDR

Use CANONNEWS for $10 off Luminar

*Conditions may apply


Terms Of UsePrivacy Statement© 2022 by CanonNews. This site is not affiliated with Canon Inc. or it's subsidiaries.
Back To Top