Our website is made possible by displaying online advertisements to our visitors.
Please consider supporting us by disabling your ad blocker.
Canon Patent Application: Yet another super-telephoto patent | Canon News
Search
× Search

News

Canon Patent Application: Yet another super-telephoto patent
CanonNews
/ Categories: Canon Patents

Canon Patent Application: Yet another super-telephoto patent

I've actually skipped a few super telephoto patent applications just because they were starting to get tiresome and repetitive.  This one seems to be quite detailed and goes into the lens body engineering as well as the optical design.

So I thought it was kind of neat unlike most that we've run across lately.

This actual patent deals mostly with the case and handling thermal expansion under high temperatures.

[0001] The present disclosure relates to a lens holding mechanism of a lens apparatus and an image pickup apparatus including the lens apparatus. 

[0002] Lens apparatuses including an interchangeable lens used in a digital still camera are used under various environments. For example, in a case in which the lens apparatus is used in a high-temperature environment, temperatures of the lenses included in the lens apparatus may increase, and the optical characteristics of the lenses may be changed. 

FOCAL LENGTH 392.56
F-number 2.90
HALF FIELD ANGLE 3.15
IMAGE HEIGHT 21.64
TOTAL LENS LENGTH 371.98 
BF 61.34

FOCAL LENGTH 488.82
F-number 4.10
HALF FIELD ANGLE 2.53
IMAGE HEIGHT 21.64
TOTAL LENS LENGTH 411.90 
BF 71.62 

FOCAL LENGTH 778.70
F-number 5.83
HALF FIELD ANGLE 1.59
IMAGE HEIGHT 21.64
TOTAL LENS LENGTH 486.03 
BF 71.54

US Patent Application 20190129135

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.
Previous Article Deal: MEFOTO BackPacker Air Travel Tripod
Next Article Canon changed their hotshoe on the SL3 - a problem?
Print
blog comments powered by Disqus

Theme picker

Keep In Touch

FacebookTwitterLinkedIn

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© 2019 by CanonNews. This site is not affiliated with Canon Inc. or it's subsidiaries.
Back To Top