Search
× Search

News

Canon Patent Application: Canon RF 14-35mm F4L mentioned
CanonNews
/ 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.

Canon Patent Application: Canon RF 14-35mm F4L mentioned

Another patent appliation from Canon has surfaced. This is a slightly different patent though, as it really doesn't define the lenses from a patent perspective, but is actually discussing a underwater housing for these lenses.  The lenses are described as examples to the actual patent.  But what I find curious is the lenses themselves, one of them have been clearly rumored to be coming in 2021.  That is of course, the Canon RF 14-35mm F4.  The lens is certainly mentioned in the patent in great detail, as much as you would expect from an actual optical patent.

Canon RF 14-35mm F4L

Focal length           14.8  21.58   32.85
F number                4.1    4.1    4.58
Half angle of view    55.62  45.07   33.37
Image height          21.64  21.64   21.64
Lens total length    244.83 244.83  244.88
BF                    16.76  16.76   16.76

Canon RF 17-40mm F4L

focal length          17.33  23.76   38.46
F-number                4.1    4.1     4.1
half angle (degrees)  51.31  42.32   29.36
Image height          21.64  21.64   21.64
total lens length    140.59  135.9  140.61
BF                    26.31  26.31   26.31

This embodiment is also curious, as it's a 24mm F2.8 prime.  It's pretty large though 79mm after you deduct the back focus distance.

Canon RF 24mm F2.8

Focal length         23.94
F number              2.83
Half angle (degree)   42.1
Image height         21.64
Lens total length    99.77
BF                   17.95

Another embodiment, however these lenses are large, I can't see them being made.

Canon RF 20mm F2.8

Focus distance        19.33 
Fnanbe                 2.92
Half angle (degrees)  48.22
Image height          21.64
total length         182.37
BF                    17.97

Japan Patent Application 2020-190696

Previous Article Black Friday Deal: GVM LED Lighting kits
Next Article Deal of the Deal: Lensbaby for Canon EF
Print
blog comments powered by Disqus

Keep In Touch

FacebookTwitterLinkedIn

Our 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© 2024 by CanonNews. This site is not affiliated with Canon Inc. or it's subsidiaries.
Back To Top