July 31, 2014, 02:13:51 AM

Author Topic: Patent: Canon 11-24mm f/4 Lens  (Read 9439 times)

fish_shooter

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #30 on: January 25, 2014, 02:31:00 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

I would not be surprised if this f/4 lens went for $3K given the size of the first few lens elements!

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #30 on: January 25, 2014, 02:31:00 PM »

fish_shooter

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #31 on: January 25, 2014, 02:33:08 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.




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.


125 degrees angle of view based on doubling the half angle stated in the patent.

ewg963

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #32 on: January 25, 2014, 02:40:00 PM »
I wish it was f/2.8...

The price might go near $3000 for that...
I understand that.  ;)
+1 Fish nothing surprises me these days.


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

I would not be surprised if this f/4 lens went for $3K given the size of the first few lens elements!
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ewg963

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #33 on: January 25, 2014, 02:41:33 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

I would not be surprised if this f/4 lens went for $3K given the size of the first few lens elements!
=+1 Fish...nothing surprises me these days.
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Etienne

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #34 on: January 25, 2014, 03:15:20 PM »
Full-frame, rectilinear, sharp, contrasty and flare resistant .. . save one for me!

traveller

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #35 on: January 25, 2014, 03:16:44 PM »
I find myself agreeing with Dilbert (God forbid  ;) ) on this one: fix the bread and butter lenses first before moving on to exotica.

hendrik-sg

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #36 on: January 25, 2014, 04:06:24 PM »
compared with the 17mm TS 11mm FF seems possible. if the image from the TS would be compresst to normal FF Image circle, there would result a 11mm 2.8 lens. Considering, that this patant is a zoom 11mm f 4.0 seems believable

comparing the angle of view mentioned in the patent with the calculator linked here, it seems to be a Full Frame lens. Not clear is, why the image high is less than 24mm, wich would be the hight of a FF sensor.

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #36 on: January 25, 2014, 04:06:24 PM »

fotoray

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #37 on: January 25, 2014, 04:09:15 PM »
This lens not identified as L lens.  Does it make sense that it should be an L lens, or can you get high quality optics at this focal length without L design standards?
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rs

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #38 on: January 25, 2014, 04:44:38 PM »
This lens not identified as L lens.  Does it make sense that it should be an L lens, or can you get high quality optics at this focal length without L design standards?

The product name of the proposed lens is never in the patent. However, without wanting to get myself proved wrong again, I'm not aware of any Canon full frame zoom lenses with a constant aperture which aren't L lenses.

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

OK, I walked into that one  ::)
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fish_shooter

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #39 on: January 25, 2014, 05:13:55 PM »
compared with the 17mm TS 11mm FF seems possible. if the image from the TS would be compresst to normal FF Image circle, there would result a 11mm 2.8 lens. Considering, that this patant is a zoom 11mm f 4.0 seems believable

comparing the angle of view mentioned in the patent with the calculator linked here, it seems to be a Full Frame lens. Not clear is, why the image high is less than 24mm, wich would be the hight of a FF sensor.


Image height refers to the distance of the image measured from the optical axis; also used for the X-axis in MTF graphs. http://www.learn.usa.canon.com/resources/articles/2013/reading_MTF_charts.shtml
Maximum image height equals half the diagonal distance of the format; so 2x that equals the diagonal of the format. Recall this is about 43mm.

tianxiaozhang

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #40 on: January 25, 2014, 05:48:38 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...

Because land is bigger than models...........

11mm might be a bit wide for most fashion work..
24~28mm works great..

LetTheRightLensIn

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #41 on: January 25, 2014, 06:47:37 PM »
I wish it was f/2.8...

personally I'd prefer f/4: smaller, lighter, less expensive, perhaps better optically

jrista

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #42 on: January 25, 2014, 07:32:46 PM »
I wish it was f/2.8...

personally I'd prefer f/4: smaller, lighter, less expensive, perhaps better optically

Agreed. Especially for the most likely use case, landscapes on a tripod, you would probably be stopping down anyways. Even for astrophotography, you'll be on a tripod and at high ISO.
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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #42 on: January 25, 2014, 07:32:46 PM »

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #43 on: January 25, 2014, 08:00:57 PM »
F4 sucks, well it does for me personally. Sure I use the 17 TS-E, an f4, a lot, but it is specialised and no real issue as an f4. As a general purpose ultrawide upgrade to the 16-35 f2.8 the focal length is very interesting, but f4 kills it for too many situations. Iso performance does not replace aperture, neither does IS, I want all three.
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jrista

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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #44 on: January 25, 2014, 08:04:41 PM »
F4 sucks, well it does for me personally. Sure I use the 17 TS-E, an f4, a lot, but it is specialised and no real issue as an f4. As a general purpose ultrawide upgrade to the 16-35 f2.8 the focal length is very interesting, but f4 kills it for too many situations. Iso performance does not replace aperture, neither does IS, I want all three.

If you need the wide aperture for boke, certainly. I would still like to see a 14-24 f/2.8 L from Canon at some point in the future. Especially if it can top Nikon's IQ corner to corner.
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Re: Patent: Canon 11-24mm f/4 Lens
« Reply #44 on: January 25, 2014, 08:04:41 PM »