Patent: Canon RF 70-240mm f/4 IS and RF 70-300mm f/4-5.6 IS

Canon Rumors Guy

Canon EOS 40D
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Jul 20, 2010
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www.canonrumors.com
Canon is obviously busy developing new lenses for the RF mount, and we expect a lot of new lenses next year. We also expect some more affordable offerings for the RF mount.
In the latest round of patents, we see optical formulas for both an RF 70-240mm f/4 IS and an RF 70-300 f/4-5.6 IS.
Canon RF 70-240mm f/4 IS USM:

Focal length 72.10mm 131.78mm 242.00mm
F-number 4.10 4.10 4.10
Half angle of view 16.70° 9.32° 5.11°
Image height 21.64mm 21.64mm 21.64mm
Total lens length 147.22mm 176.39mm 210.90mm
BF 12.95mm 25.54mm 36.63mm

Canon RF 70-300mm f/4-5.6 IS USM:

Focal length 72.10mm 144.31mm 289.00mm
F-number 4.60 5.68 5.88
Half angle of view 16.70° 8.53° 4.28°
Image height 21.64mm 21.64mm 21.64mm
Total lens length 136.41mm 169.48mm 201.14mm
BF 12.95mm 28.75mm 42.22mm

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aquagene

EOS R and SL2
Apr 19, 2019
7
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That RF 70-300 has been the one I'm really looking forward to. Using the EF 70-300 Nano USM with adapter right now for wildife photography and it's pretty unwieldy at times. This new design at 137mm (5.4 inches) closed will be amazing.

Interesting to see a 70-240 F4. I'm guessing that's probably just a design patent that might not turn into a lens.
 
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Architect1776

Defining the poetics of space through Architecture
Aug 18, 2017
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I think it was just yesterday I read an uproar railing against Canon for not making a RF 70-300. :ROFLMAO: What will be the crying be about today? ;)

The trolls will find something else in order to make their poor choices be justified in their minds.
 
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Nov 2, 2016
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What makes you think it’s not an L?

I'm just going by the designation given here. If he suspected it might be an L, he would have said so. He usually expresses skepticism at things he thinks are suspicious. He also said “affordable offerings”. It seems as though these two lenses are some of those.

i hope this is an affordable f4. That would be something.
 
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Jul 21, 2010
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I'm just going by the designation given here. If he suspected it might be an L, he would have said so. He usually expresses skepticism at things he thinks are suspicious. He also said “affordable offerings”. It seems as though these two lenses are some of those.

i hope this is an affordable f4. That would be something.
Compared to lenses like the RF 50, 85 and 28-70, a lens priced like the EF 70-200/4L IS would be ‘affordable’
 
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May 11, 2017
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I'm just going by the designation given here. If he suspected it might be an L, he would have said so. He usually expresses skepticism at things he thinks are suspicious. He also said “affordable offerings”. It seems as though these two lenses are some of those.

i hope this is an affordable f4. That would be something.
Would the L designation necessarily be included in a patent application?
 
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