Patent: Very small large aperture zoom lens optical formulas

mdcmdcmdc

EOS R7, M5, 100 (film), Sony α6400
CR Pro
Sep 4, 2020
213
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Your math is wrong. The diameter of the FF image circle is ~43.2mm, and the image height for a FF image circle is ~21.6mm (not coincidentally, the image height at the longer focal lengths of the lenses in these patents is 21.64mm).
My math was right, it’s my typing that was wrong! 21.6 mm, agreed.
 
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t.linn

EOS R5
Jan 12, 2011
194
71
Oregon - USA
www.tlinn.com
So why is this important to the average consumer? Not as if someone is going to manufacture or 3D a lens. Besides it is one of hundreds if not thousands of Canon patents.
If you dislike rumors, perhaps you should not visit rumor sites. This stuff doesn't have to be important. It is okay if it is simply interesting.
 
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neuroanatomist

I post too Much on Here!!
CR Pro
Jul 21, 2010
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If you dislike rumors, perhaps you should not visit rumor sites. This stuff doesn't have to be important. It is okay if it is simply interesting.
He would rather visit CanonRuMErs, the site where only rumors you personally care about are posted.
 
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yungfat

EOS 90D
Feb 16, 2013
136
58
There’s always a trade off when bringing camera for vacation, weather sealed and large aperture lens I si going to be heavy and huge, really hope canon can come out something light with large aperture and weather sealed lens.
 

entoman

wildlife photography
May 8, 2015
1,217
1,484
UK

Canon’s goal in this patent​

To provide a zoom lens having a short total length and a small size but having high optical performance, and an image pickup apparatus having the same.
Mystified and amused by the terminology... :unsure:

How can the "image pickup apparatus" (presumably the camera sensor) have the "same" (i.e. a short total length, small size and high optical performance?

Something has been lost in the translation here - if they are not referring to the sensor, what exactly do they mean by "image pickup apparatus"?
 

neuroanatomist

I post too Much on Here!!
CR Pro
Jul 21, 2010
27,562
7,351

Canon’s goal in this patent​


Mystified and amused by the terminology... :unsure:

How can the "image pickup apparatus" (presumably the camera sensor) have the "same" (i.e. a short total length, small size and high optical performance?

Something has been lost in the translation here - if they are not referring to the sensor, what exactly do they mean by "image pickup apparatus"?
Image pickup apparatus = camera.