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Canon Patent Application: Canon RF 35-135mm F2.8
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Canon Patent Application: Canon RF 35-135mm F2.8

This is a curious optical patent from Canon featuring some very uncommon focal length zooms.  Reading through the patent application, they simply seem to indicate they wanted to design a high-performance zoom.

A zoom covering 35 to 135mm however would replace a significant number of primes, would some of you like this lens?

Canon RF 35-135mm F2.8

Focus distance     35.39   69.00  132.93
F number            2.85    2.85    2.85
Half angle (°)     31.44   17.41    9.24
Image height       21.64   21.64   21.64
Lens total length 173.35  186.83  203.35
BF                 17.95   27.32   34.01

Canon RF 40-150mm F2.8

focus Distance     40.06   69.00  147.97
F number            2.85    2.85    2.85
Half angle (°)     28.37   17.41    8.32
Image height       21.64   21.64   21.64
Lens total length 173.35  191.43  218.30
BF                 17.98   26.04   38.94

Canon RF 30-110mm F2.8

Focal length       30.99   69.00  109.92
F number            2.85    2.85    2.85
Half angle ( °)    34.92   17.41   11.13
image height       21.64   21.64   21.64
total lens length 173.09  189.92  203.35
BF                 17.95   28.25   33.97

Japan Patent Application 2020-197600

Previous Article New Rumor: Sigma to start creating RF mount lenses in 2021
Next Article Canon Patent Application: 1.0x to 2.0x Zoomable Teleconvertor
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