Canon Patents 42x Zoom Lens!

jogiba · 05-19-2011, 11:32 AM

Publication number Patent 2011-33868 (P2011-33868A)

Release date February 17, 2011 (2011.2.17)

Numerical Example

•F = 4.36-180.0mm focal length
•Fno = 2.54-5.74
•38.63-1.23 Â° angle
•Image height is 3.49-3.88mm
•Total lens length 94.37-134.09
•Back Focus 9.00-6.38
•41.24 zoom ratio
•Two-sided aspheric
Optical system

•Positive lead type zoom lens
•Zooming, the object first and third groups, the group moved toward the second image
•The third lens group for image stabilization
•Expression rear focus lens group to focus on the fifth

Canon Patents 42x Zoom Lens!

Zav · 05-19-2011, 10:07 PM

"Image height is 3.49-3.88mm" It's for a bridge.

jogiba · 05-20-2011, 05:18 AM

I am sure it's for the new SX40 IS upgrade in the fall to the SX30 IS that is the best superzoom for HD video in the 24-840mm (35mm eqiv ) range handheld because of 4.5 stop IS system .

fisheye freak · 06-28-2011, 06:35 AM

Remarkably simple design for such a megazoom. I wonder how good it could be optically ? All they need is to add a second zoom (to mount on to second camera) with a circular fisheye to 28mm equivalent and they have everything virtually sown up. Mind you, technology will make this defunct - it is only a matter of time.
Once the manufacturers cotton on to making curved sensors, spherical abberation and flat field correction will cease to bug designs . It will then be possible to make fast, light , less complicated lenses which will be as sharp(or sharper) wide open . Just imagine- high quality, not too expensive to manufacture lenses in the F/ 0.95 speed up to 200mm focal length ! Then all our current gear will become paperweights, just as the old 35mm gear has become.

jogiba · 06-28-2011, 02:08 PM

Hey fisheye freak do you live near Bondi Beach were I took this photo ?

05-19-2011, 11:32 AM	#1
jogiba Banned Join Date: Sep 2006 Location: Millstone,NJ Posts: 6,491	Canon Patents 42x Zoom Lens! Publication number Patent 2011-33868 (P2011-33868A) Release date February 17, 2011 (2011.2.17) Numerical Example •F = 4.36-180.0mm focal length •Fno = 2.54-5.74 •38.63-1.23 Â° angle •Image height is 3.49-3.88mm •Total lens length 94.37-134.09 •Back Focus 9.00-6.38 •41.24 zoom ratio •Two-sided aspheric Optical system •Positive lead type zoom lens •Zooming, the object first and third groups, the group moved toward the second image •The third lens group for image stabilization •Expression rear focus lens group to focus on the fifth Canon Patents 42x Zoom Lens!

05-20-2011, 05:18 AM	#3
jogiba Banned Join Date: Sep 2006 Location: Millstone,NJ Posts: 6,491 Original Poster	I am sure it's for the new SX40 IS upgrade in the fall to the SX30 IS that is the best superzoom for HD video in the 24-840mm (35mm eqiv ) range handheld because of 4.5 stop IS system . Vimeo Vimeo Vimeo Vimeo Last edited by jogiba; 05-20-2011 at 05:33 AM.

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05-19-2011, 10:07 PM	#2
Zav Pentaxian Join Date: Feb 2009 Photos: Gallery Posts: 1,371	"Image height is 3.49-3.88mm" It's for a bridge.

06-28-2011, 06:35 AM	#4
fisheye freak Senior Member Join Date: Jan 2008 Location: Bondi, Australia Posts: 206	Remarkably simple design for such a megazoom. I wonder how good it could be optically ? All they need is to add a second zoom (to mount on to second camera) with a circular fisheye to 28mm equivalent and they have everything virtually sown up. Mind you, technology will make this defunct - it is only a matter of time. Once the manufacturers cotton on to making curved sensors, spherical abberation and flat field correction will cease to bug designs . It will then be possible to make fast, light , less complicated lenses which will be as sharp(or sharper) wide open . Just imagine- high quality, not too expensive to manufacture lenses in the F/ 0.95 speed up to 200mm focal length ! Then all our current gear will become paperweights, just as the old 35mm gear has become.

06-28-2011, 02:08 PM	#5
jogiba Banned Join Date: Sep 2006 Location: Millstone,NJ Posts: 6,491 Original Poster	Hey fisheye freak do you live near Bondi Beach were I took this photo ?