Canon Patent Applications: Canon RF Zoom lenses

[Canon Rumors Guy]

This patent application (Japan 2023-125903) has a lot of esoteric fast zoom lenses in some very nontraditional focal lengths. Many of the embodiments are missing the image height, however since we also have the half angle of view, we can work backward to verify if these lenses are meant for full frame or for APS-C.

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[Snapster]

These 45-135 f/2.8 patents seem light years behind Tamron and Samyang 35-150 f/2-2.8 and twice as big.

Time to license the mount and make money that way, Canon.

 

[Richard CR]

These 45-135 f/2.8 patents seem light years behind Tamron and Samyang 35-150 f/2-2.8 and twice as big.

Time to license the mount and make money that way, Canon.

thanks for bringing that up. I need to revise my last paragraph a bit. the size does lead credence to it being for cinema lenses.

 

[DhlcadR6]

If is a cinema lens...would it be more appropriate to use T number instead??

 

[EOS 4 Life]

thanks for bringing that up. I need to revise my last paragraph a bit. the size does lead credence to it being for cinema lenses.

So does the back focus.
Mirrorless should be a lot shorter.
I am guessing EF/PL.

 

[EOS 4 Life]

If is a cinema lens...would it be more appropriate to use T number instead??

I never see T numbers used in their patents.

 

[Kit.]

If is a cinema lens...would it be more appropriate to use T number instead??

T number is affected by factors that are normally not covered in optical scheme patents.

 

[Richard CR]

So does the back focus.
Mirrorless should be a lot shorter.
I am guessing EF/PL.

it depends on if they want them to be teleconvertor friendly.

 

[Richard CR]

I never see T numbers used in their patents.

I think i have ONCE in the 5 or 6 years I've been reading and writing about canon patent applications. it's a very rare thing for them to specify Tstop on a patent application. It certainly would make things easier to identify.