July 29, 2014, 11:58:06 AM

Author Topic: Patent: Canon 11-24mm f/4 Lens  (Read 9421 times)

Zv

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #15 on: January 25, 2014, 11:21:11 AM »
It's only a patent. Unlikely this will ever see the light of day. Least we know Canon are exploring the wide end for a change.

11mm? How would that work I wonder while keeping it rectilinear? Intresting.

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #15 on: January 25, 2014, 11:21:11 AM »

J.R.

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #16 on: January 25, 2014, 11:52:30 AM »
sorry if I sound like a noob but what do you mean by a rectilinear lens?
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tianxiaozhang

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #17 on: January 25, 2014, 11:56:50 AM »
sorry if I sound like a noob but what do you mean by a rectilinear lens?

Non fisheye

rs

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #18 on: January 25, 2014, 11:58:27 AM »
It's only a patent. Unlikely this will ever see the light of day. Least we know Canon are exploring the wide end for a change.

11mm? How would that work I wonder while keeping it rectilinear? Intresting.




It's possible. Anything where the diagonal sees less than 180' is possible. Just difficult. A rectilinear lens will need the corners stretching out loads to keep straight lines straight, and being such an extreme wide angle, expect huge stretching from such a lens. Clouds in the sky will take on a whole new lens created shape.

http://www.canon.com/bctv/calculator/calculator1.html will give you an idea about the AoV of such a lens.

The Sigma 12-24 is the nearest match that currently exists.
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J.R.

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #19 on: January 25, 2014, 12:01:07 PM »
sorry if I sound like a noob but what do you mean by a rectilinear lens?

Non fisheye

Thanks ... Sometimes this optical terminology gets incomprehensible for me.
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ewg963

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #20 on: January 25, 2014, 12:08:05 PM »
I wish it was f/2.8...

The price might go near $3000 for that...
I understand that.  ;)
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J.R.

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #21 on: January 25, 2014, 12:12:04 PM »
I wish it was f/2.8...

The price might go near $3000 for that...
I understand that.  ;)

I don't really understand that, but I expect that ... even if it is f/4 ;D
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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #21 on: January 25, 2014, 12:12:04 PM »

ewg963

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #22 on: January 25, 2014, 12:19:08 PM »
I wish it was f/2.8...

The price might go near $3000 for that...
I understand that.  ;)

I don't really understand that, but I expect that ... even if it is f/4 ;D
I know that type of glass won't cheap but I'll settle for the f/4
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ewg963

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #23 on: January 25, 2014, 12:34:16 PM »
I wish it was f/2.8...

Just out of curiousity, why?  I mean, practically, and not just because you want a collection of f/2.8 or faster lenses :)

24mm is too wide for events & people (where you might want the speed) due to the distortion, so odds are 99% of the use of this will be for landscape.  Landscape is f/8+ most of the time...  And the wide side we already have the 16-35mm f/2.8 for events & people - whose focal length is actually long enough to shoot people without unflattering distortion.

It is possible the f/4 design might reduce cost, size, weight, and actually improve image quality at smaller apertures where this would be used 99% of the time.
I've used the Nikon 14-24mm for events and people. I hoping was that Canon make a zoom similiar to that..yeah yeah the 16-35 good glass but the Nikon outshines it. The 16-35 mm I've tried it and "meh". I agree it would be used mostly for landscape. I have a streak of creativity.... I'm buying it regardless anyhow if this glass become reality. ;D
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dilbert

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #24 on: January 25, 2014, 12:38:19 PM »
How about they fix the corner sharpness and general distortion issues at the wide end of the 17-40 and 16-35 first?

dilbert

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #25 on: January 25, 2014, 12:40:06 PM »
If they released this, it would be the ultimate landscape zoom assuming the optics are good...

A perfect fit between the more effect-driven 8-15mm f/4 fisheye and the event-oriented 16-35mm f/2.8...

Hope this one comes out!  Given Canon's current lineup, it makes more sense than a 14-24 f/2.8.

Why does everyone assume a wide angle is perfect for landscape?

FWIW, I've watched professionals use the 16-35 when shooting models...

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #26 on: January 25, 2014, 12:59:56 PM »
It's only a patent. Unlikely this will ever see the light of day. Least we know Canon are exploring the wide end for a change.

11mm? How would that work I wonder while keeping it rectilinear? Intresting.

Sigma did with their 12-24mm mk I. It was a full frame, fully corrected rectilinear lens...with almost zero distortion. It was quite an amazing lens, dogged by poor QC from Sigma.

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #27 on: January 25, 2014, 01:32:35 PM »
Absolutely agree with 16-35 for portraits and people shots. Not every portrait is a headshot.

Did they make it f4 to keep a smaller front element to make use of normal screw in filters perhaps ?
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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #27 on: January 25, 2014, 01:32:35 PM »

rs

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #28 on: January 25, 2014, 01:59:51 PM »
Did they make it f4 to keep a smaller front element to make use of normal screw in filters perhaps ?

Not likely - look at the shape of the front element on the patent:



I don't think there's one lens with such a wide angle of view (or even close) and f2.8
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Rudeofus

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #29 on: January 25, 2014, 02:22:55 PM »
I don't think there's one lens with such a wide angle of view (or even close) and f2.8


Look at this lens here: Nikkor 6mm f/2.8 fisheye lens

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #29 on: January 25, 2014, 02:22:55 PM »