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Author Topic: Patent: EF 24-70 f/2.8L IS  (Read 19973 times)

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Patent: EF 24-70 f/2.8L IS
« on: September 20, 2013, 11:06:33 PM »

New Patent

We’ve heard before that an EF 24-70 f/2.8L IS was in testing.


A patent has surfaced that has confirmed Canon testing such a lens. The Canon folks out there would be pretty accepting of such a lens.



  • Patent Publication No. 2013-182246

    • Publication date 2013.9.12

    • Filing date 2012.3.5



  • Example 1

    • Zoom ratio 2.75

    • Focal length f = 24.70-36.42-67.88mm

    • Fno. 2.91

    • Half angle ω = 41.22-30.71-17.68 °

    • Image height 21.64mm

    • 164.87-172.85-196.79mm overall length of the lens

    • BF 39.07-44.44-54.56mm

    • 20 pieces of 13-group lens configuration

    • Four four-sided aspherical



  • Example 2

    • Zoom ratio 2.76

    • Focal length f = 24.70-34.88-68.18mm

    • Fno. 2.91

    • Half angle ω = 41.22-31.81-17.61 °

    • Image height 21.64mm

    • 165.79-174.26-199.67mm overall length of the lens

    • BF 38.47-42.81-58.00mm

    • 20 pieces of 15-group lens configuration

    • Three 3 aspherical surface



  • Example 3

    • Zoom ratio 3.22

    • Focal length f = 24.70-39.67-79.43mm

    • Fno. 2.91

    • 41.22-28.61-15.24 ° angle of view

    • Image height 21.64mm

    • 161.98-171.74-200.99mm overall length of the lens

    • BF 38.35-46.17-57.64mm

    • 20 pieces of 13-group lens configuration

    • Four four-sided aspherical



  • Canon patent

    • 5-group zoom of positive and negative positive positive and negative

    • Antivibration (fourth lens group)




Source: [EG]


cr


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Patent: EF 24-70 f/2.8L IS
« on: September 20, 2013, 11:06:33 PM »

wickidwombat

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #1 on: September 20, 2013, 11:11:19 PM »
finally !  ::)

i wonder when it will be released? 2020?

i think sigma will more likely have my money again before canon get this out in the wild
especially if the rumoured f2 lens is on par with their latest offerings
APS-H Fanboy

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #2 on: September 20, 2013, 11:33:20 PM »
i'm much more excited about the Sigma F2.
I'm extremely tired of companies offering very small incremental changes over longggg periods of time. I'm not holding my breath for Canon to release what I want, I'm just moving on.
They easily could have made the 24-70 2.8 II an IS lens to begin with, which we all wanted and expected, especially for the price.  Had they made one, I probably would've bought a 5DIII and that lens(Instead of switching to Nikon who's 24-70 is amazing.)
At this point in time, I'm much more excited about 2.8 zooms and cheap bodies for the EOS M and a FF mirrorless.
I would not pay 2500 dollars for another DSLR lens as I'm very tired of the weight, and I'm not a pro. I'll probably just hold out and hope Sony can make a 24-50mm 2.8 in a size smaller than current 24-70 2.8's for the upcoming full frame mirrorless they're announcing.

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Menace

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #3 on: September 20, 2013, 11:36:47 PM »
Good news for those who do not have a 24-70 2.8 or have the original version but want to upgrade to the latest version but haven't done it yet. OTH, these people may be waiting for a VERY long time for the IS version of this lens.

Personally, I couldn't be happier with my EF24-70 f2.8 II.
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24-70 2.8L II | 70-200 2.8L IS II

cellomaster27

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #4 on: September 20, 2013, 11:37:15 PM »
finally !  ::)

i wonder when it will be released? 2020?

i think sigma will more likely have my money again before canon get this out in the wild
especially if the rumoured f2 lens is on par with their latest offerings

Ah! You beat me to it!
The sigma 24-70 OS and at f/2!! I'll go for that than the 2.8..  It will be cheaper than the canon version... right? ;) Even though the sigma might not be weather sealed or have the red ring, their new lenses are looking so fine and are performing top notch. I have faith in sigma!

And if/when this canon 24-70mm 2.8 IS comes out, how much will they charge... Version II sells for 2299... Without IS. Haha.
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AtSea

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #5 on: September 20, 2013, 11:47:22 PM »
If Tamron can do it - why in the hell can't Canon?

Just sayin!

Marsu42

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #6 on: September 20, 2013, 11:52:46 PM »
If Tamron can do it - why in the hell can't Canon?

Because with the iq of the Canon and IS it would need larger-than-82mm filters and would be much heavier - Canon opted against it back then.

Also a 24-70 rumor popping up usually means there won't be any acutal lens releases for the next months :-p

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #6 on: September 20, 2013, 11:52:46 PM »

Radiating

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #7 on: September 21, 2013, 12:17:00 AM »
i'm much more excited about the Sigma F2.
I'm extremely tired of companies offering very small incremental changes over longggg periods of time. I'm not holding my breath for Canon to release what I want, I'm just moving on.
They easily could have made the 24-70 2.8 II an IS lens to begin with, which we all wanted and expected, especially for the price.  Had they made one, I probably would've bought a 5DIII and that lens(Instead of switching to Nikon who's 24-70 is amazing.)
At this point in time, I'm much more excited about 2.8 zooms and cheap bodies for the EOS M and a FF mirrorless.
I would not pay 2500 dollars for another DSLR lens as I'm very tired of the weight, and I'm not a pro. I'll probably just hold out and hope Sony can make a 24-50mm 2.8 in a size smaller than current 24-70 2.8's for the upcoming full frame mirrorless they're announcing.

Just an FYI based on insider info Canon was testing several variations on the 24-70mm IS. Due to Canon's choice of image quality criteria the prototypes were unreasonably large and heavy. So Canon opted not to release them because they thought they would be too oversized.

Tamron was able to create a 24-70mm 2.8 IS in a small size because they compromised on image quality.

To get around the fact that a fast image stabilized lens would be huge and heavy Canon even considered a 28-70mm f/2.8 IS.

The 28-70mm f2.8 IS would have had a filter size of 86mm. The 24-70mm f/2.8 IS would have had a filter size of 95mm based on Canon's patents.

The lens would have looked something like this:



That's a Nikon 14-24mm with a 95mm filter which matches the dimensions of the Canon patent.



I personally begged Canon to release the prototype.

Also some people suggest that Canon didn't release it because it would have a low profit margin.
« Last Edit: September 21, 2013, 01:32:19 AM by Radiating »

willhuff.net

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #8 on: September 21, 2013, 12:20:39 AM »
I only care about this because it might cause a price drop in the 24-70II, unless they can make the IS version even sharper.

pwp

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #9 on: September 21, 2013, 12:46:20 AM »
The wait for the non-IS version was interminable...this one should keep the rumor-mill going for years.
At least it gives people a chance to negotiate a bank loan for the no doubt high $$ asking price.
IS would always be nice, but I couldn't be happier with my 24-70 f/2.8II.

-pw

Jim Saunders

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #10 on: September 21, 2013, 12:51:00 AM »
What I don't understand about this lens is what it accomplishes; Why spend at very least $3000 on this if it ever comes out? 

Jim
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Old Shooter

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #11 on: September 21, 2013, 01:13:18 AM »
The wait for the non-IS version was interminable...this one should keep the rumor-mill going for years.
At least it gives people a chance to negotiate a bank loan for the no doubt high $$ asking price.
IS would always be nice, but I couldn't be happier with my 24-70 f/2.8II.

-pw

LOL! Exactly! I couldn't agree more!
5DIII, XSi, A2, 10s (x2), 20-35L, 24-70L II, 28-70L, 70-200L, 70-200L IS II, 85L II, 135L, 40 Pancake, 50 Macro, 100 Macro, 135 Soft-Focus, Crappy EF-S Kit Lens, 430EX II, Metz 45 CL-4, Metz 60 CT-4 (x2), White Lightnings, and lots of other junk...

Woody

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #12 on: September 21, 2013, 01:13:32 AM »
We Canon users will always live in fantasy, looking longingly at our dream cameras and lenses through the eyes of our minds...

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #12 on: September 21, 2013, 01:13:32 AM »

Stone

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #13 on: September 21, 2013, 01:25:44 AM »
Considering the price of the 24-70 non-IS, I can imagine Canon asking $3k for this lens if they plan to release it.  Way out of the price range of most serious amateurs and many professionals at that.

Personally, i've had my fill of Canon sticker shock, I'll be picking up the current version, but only after I sell off my 7D and EF-S glass to partially fund the purchase.  Canon should have released this first at the current price point, I'm certain they would still make a nice profit per lens and probably had more sales....
« Last Edit: September 21, 2013, 01:27:15 AM by Stone »
5D III gripped | 7D gripped | 35L | 24-70 2.8L II USM | 70-200 2.8L IS II USM | 85 1.8 |

duydaniel

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #14 on: September 21, 2013, 01:37:41 AM »
what's wrong with 18-55 IS?  ::)

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Re: Patent: EF 24-70 f/2.8L IS
« Reply #14 on: September 21, 2013, 01:37:41 AM »