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Author Topic: Patent: Canon EF 300-600 f/5.6 w/1.4x TC  (Read 15267 times)

Canon Rumors

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Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« on: December 06, 2013, 08:50:14 AM »
Super telephoto patent
A new Canon patent showing other lens formulas using a built-in 1.4x teleconverter. Two of the primary lenses are an EF 300-600 f/5.6L IS 1.4x and a 600 f/4L IS with a built in TC.

The same patent also shows the EF 200-400 f/4L IS 1.4x TC. Perhaps Canon sees value in this setup for longer lenses? Here’s hoping so.

Example 2

  • Focal length f = 585.10mm
  • Fno. 4.12
  • Half angle ω = 2.12 °
  • Image height Y = 21.64mm
  • The overall length of the lens 467.32mm
  • BF 83.15mm
  • Teleconference insertion
  • Focal length f = 819.00mm
  • Fno. 5.77
  • Half angle ω = 1.51 °

Example 3

  • Zoom ratio 1.90
  • Focal length f = 307.50 – 585.00mm
  • Fno. 5.88
  • Half angle ω = 4.02 – 2.12 °
  • Image height Y = 21.64mm
  • The overall length of the lens 405.00mm
  • BF 75.70mm
  • Teleconference insertion
  • Focal length f = 427.00 – 812.33mm
  • Fno. 8.17
  • Half angle ω = 2.90 – 1.53 °

Source: [EG]

cr

« Last Edit: December 06, 2013, 09:26:30 AM by Canon Rumors »
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Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« on: December 06, 2013, 08:50:14 AM »

neuroanatomist

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #1 on: December 06, 2013, 08:53:43 AM »
I'd love a 600/4 with a built-in 1.4x TC. Not sure we'll see one soon, though.
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Don Haines

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #2 on: December 06, 2013, 08:59:30 AM »
And I'm sure it will be for slightly less cost than the Tamron 150-600 lens.... :)
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mackguyver

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #3 on: December 06, 2013, 09:07:56 AM »
I know patents are often done purely for protective purposes and never see the light of day, but I would love to see these designs come true!  My wallet is crying just from the mention of this patent, however  ;) :'(
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docsmith

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #4 on: December 06, 2013, 09:14:22 AM »
I really fault Canon for not being very creative or innovative   ;D ;D ;D

A 300-600 f5.6 with a 1.4TC that is optically on par with the big whites? That is a dream lens.  I probably can't afford it. 

optikus

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #5 on: December 06, 2013, 09:23:33 AM »
Hi,

I'd often thought about the further use of the 200-400's system due to it's overwhelmingly reactions in the pro's market. And what is shown here is a consequent reaction. If F5,6 is the end of what is possible may be a question, perhaps F4.5 would hit more precise what is demanded - but it is a right step on Canon's way to stay the No. 1 in the market.

Joerg
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unfocused

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #6 on: December 06, 2013, 09:54:56 AM »
I would be nice if this were in an "affordable" range, but I'm not holding my breath.

At the same time I'm wondering about the f5.6 maximum aperture with a 1.4 TC. Which means this would only autofocus on the 5DIII and 1DX with the extender, correct? Could this be an indication that the 7DII will autofocus at f8? That would certainly be one way to add value to the next generation.
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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #6 on: December 06, 2013, 09:54:56 AM »

Sabaki

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #7 on: December 06, 2013, 09:55:29 AM »
Anybody else getting the idea that 2014 is gonna be a Canon year in a big way?
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Northstar

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #8 on: December 06, 2013, 10:14:32 AM »
this would be nice…but i'm sensing a $15,000 price tag
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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #9 on: December 06, 2013, 10:22:00 AM »
I would be nice if this were in an "affordable" range, but I'm not holding my breath...

No worries - price will be a very affordable $30,000 US.  Plus it will come with dual tripod mounts to accomodate the two tripods necessary to hold it up!  :o

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #10 on: December 06, 2013, 10:40:13 AM »
The FD version was 150-600/5.6.  So should this be.  300/420 at the WIDE end isn't wide enough.  Sigma and Tamron both have super tele's with wider zoom ranges than 2x.

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #11 on: December 06, 2013, 10:58:24 AM »
I would be nice if this were in an "affordable" range, but I'm not holding my breath...

No worries - price will be a very affordable $30,000 US.  Plus it will come with dual tripod mounts to accomodate the two tripods necessary to hold it up!  :o

Yes...I should have engaged brain before keyboard. Looks like my best hope will be the Tamron.
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tron

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #12 on: December 06, 2013, 11:03:22 AM »
And I'm sure it will be for slightly less cost than the Tamron 150-600 lens.... :)
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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #12 on: December 06, 2013, 11:03:22 AM »

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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #13 on: December 06, 2013, 11:13:13 AM »
I would be nice if this were in an "affordable" range, but I'm not holding my breath.

At the same time I'm wondering about the f5.6 maximum aperture with a 1.4 TC. Which means this would only autofocus on the 5DIII and 1DX with the extender, correct? Could this be an indication that the 7DII will autofocus at f8? That would certainly be one way to add value to the next generation.

I don't see Canon releasing anything with an 'f/8' maximum aperture.
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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #14 on: December 06, 2013, 11:13:34 AM »
I'd have to sell a kidney.  And maybe a lung.   :P
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Re: Patent: Canon EF 300-600 f/5.6 w/1.4x TC
« Reply #14 on: December 06, 2013, 11:13:34 AM »