Canon patent for 3.6-255mm f/2.8-7 PowerShot lens with built-in extender

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Interesting Canon patent for a 3.6-255mm f/2.8-7 lens for PowerShot cameras. The interesting fact: the lens has a built-in extender. With the extender, this lens becomes a 1000mm f/10 (35mm equivalent).

  • Patent publication number 2016-212210
    • Publication date 2016.12.15
    • Application date 2015.5.7
  • Example 1
    • Zoom ratio 66.07
    • Focal length 3.71 10.16 245.00
    • F number 2.90 4.99 7.07
    • Half angle of view (degree) 40.59 20.88 0.91
    • Lens total length 94.31 86.88 150.26
    • BF 9.45 16.24 9.56
    • Lens construction 11 groups 14 pieces
    • Aspheric surface 3 surfaces 2 pieces
    • UD 2
    • Super UD 1
  • Super telephoto (D)
    • Focal length 359.99
    • F number 10.39
    • Half angle of view (degree) 0.62
    • Lens total length 150.26
    • BF 3.56
    • Lens composition 13 groups 17 sheets
    • Aspheric surface 3 surfaces 2 pieces
    • UD 3
    • Super UD 1

Excerpt from the patent literature (note: machine translated):

[Claim(s)] [Claim 1] They are a main lens system which has a focus lens system which moves on the occasion of focusing, and an optical system which has a converter lens system which expands a focal distance of the whole system,
The aforementioned converter lens system is removable to space formed when the aforementioned focus lens system moves on the occasion of focusing,
When the aforementioned converter lens system has the lens part Gn of negative refracting power, and the lens part Gp of positive refracting power from the object side in order to the image side bordering on the widest air spacing in optical axis direction and a focal distance of fN and the aforementioned lens part Gp is set to fP for a focal distance of the aforementioned lens part Gn,
-9.3<fP/fN<-1.0
An optical system satisfying a becoming conditional expression.
[Claim 2] When [ of the aforementioned converter lens system ] setting a curvature radius of a lens surface on the object side to Rf and setting to Rr a curvature radius which is a lens surface on the image side most most,
2.0<(Rf+Rr)/(Rf-Rr)<100.0
The optical system according to claim 1 satisfying a becoming conditional expression.
[Claim 3] the aforementioned lens part Gn — most — a curvature radius of a lens surface on the image side — a time of setting a curvature radius of a lens surface on the object side to Rpf most of Rnr and the aforementioned lens part Gp,
-600.0<(Rnr+Rpf)/(Rnr-Rpf)<0.0
The optical system according to claim 1 or 2 satisfying a becoming conditional expression.
[Claim 4] An optical system of a description in any 1 item of Claims 1-3 characterized by comprising the following.
A positive lens of meniscus shape in which the aforementioned lens part Gn turned a concave surface to the image side in order from the object side at the object side.
Both lens surfaces comprise a cemented lens which joined a negative lens of concave shape, and, as for the aforementioned lens part Gp, the image side is a positive lens of a convex configuration.

[Claim 5] The aforementioned optical system is Sk about distance of the aforementioned converter lens system when it consists of zoom lenses and equips with the aforementioned converter lens system on an optic axis which it is most on an optic axis from a lens surface on the image side to the image surface. When [ of the aforementioned main lens system when the aforementioned main lens system is not equipped with the aforementioned converter lens system in telephoto end ] setting distance on an optic axis from a lens surface on the object side to the image surface to TD most,
0.005<Sk/TD<0.060
An optical system of a description in any 1 item of Claims 1-4 satisfying a becoming conditional expression.
[Claim 6] When [ of the aforementioned focus lens system / in / the aforementioned optical system consists of zoom lenses, and / telephoto end ] setting thickness on an optic axis of SSk and the aforementioned converter lens system to CTD for distance on an optic axis from a lens surface on the image side to the image surface most,
0.50<SSk/CTD<1.40
An optical system of a description in any 1 item of Claims 1-5 satisfying a becoming conditional expression.
[Claim 7] When setting thickness on an optic axis of M and the aforementioned converter lens system to CTD for movement magnitude of the aforementioned focus lens system when the aforementioned optical system consists of zoom lenses and it equips with the aforementioned converter lens system on an optic axis in telephoto end,
0.50<M/CTD<1.40
An optical system of a description in any 1 item of Claims 1-6 satisfying a becoming conditional expression.
[Claim 8] The aforementioned optical system is TD most about distance on an optic axis from a lens surface on the object side to the image surface, when it consists of zoom lenses and is not equipped with the aforementioned converter lens system on an optic axis in telephoto end. It is TD/TDA=1.0, when it equips with the aforementioned converter lens system on an optic axis and distance on an optic axis from a lens surface on the object side to the image surface is most set to TDA.
An optical system of a description in any 1 item of Claims 1-7 satisfying a becoming conditional expression.
[Claim 9] It is a zoom lens provided with a focus lens system which the aforementioned main lens system has a plurality of lens groups, and an interval of a lens group which is adjacent to on the occasion of zooming changes, and moves on the occasion of focusing,
An optical system of a description in any 1 item of Claims 1-8, wherein space formed when the aforementioned focus lens system moves in telephoto end is equipped with the aforementioned converter lens system.
[Claim 10] To order, the aforementioned main lens system is the 1st lens group of positive refracting power from the object side to the image side. The 2nd lens group of negative refracting power, the 3rd lens group of positive refracting power, the 4th lens group of negative refracting power, It is a zoom lens from which an interval of a lens group which comprises the 5th lens group of positive refracting power, and is adjacent to on the occasion of zooming changes, An optical system of a description in any 1 item of Claims 1-8, wherein space which said 5th lens group is the aforementioned focus lens system, and is formed when said 5th lens group moves in telephoto end is equipped with the aforementioned converter lens system.
[Claim 11] To order, the aforementioned main lens system is the 1st lens group of positive refracting power from the object side to the image side. The 2nd lens group of negative refracting power, the 3rd lens group of positive refracting power, the 4th lens group of negative refracting power, It comprises the 5th lens group of positive refracting power, and the 6th lens group of positive refracting power, It is a zoom lens from which an interval of a lens group which is adjacent to on the occasion of zooming changes, An optical system of a description in any 1 item of Claims 1-8, wherein space which said 5th lens group is the aforementioned focus lens system, and is formed when said 5th lens group moves in telephoto end is equipped with the aforementioned converter lens system.
[Claim 12] An imaging device having a solid state image pickup device which carries out light reception of the image formed by Claim 1 thru/or an optical system and the optical system of a description in any 1 item of Claim 11.

[via Egami]

Canon patent for 6-22mm f/1.4-1.8 lens for Powershot cameras with 1/1.7″ sensor

6-22mm
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Canon patent describing an optical formula for a 6-22 mm f/1.4-1.8 lens for a 1/1.7″ sensor equipped camera. 6-22mm is 28-100mm equivalent on full-frame sensors.

The Canon PowerShot G3 X and Powershot S110 are equipped with a 1/1.7″ sensor (as other Canon Powershots), so I guess this patent is possibly referring to a future Powershot model.

  • Patent publication number 2016 – 191753
    • Release date 2016.11.10
    • Application date 2015.3.31
  • Example 1
    • Zoom ratio 3.43
    • Focal length 6.15 20.03 21.08
    • F number 1.44 1.85 1.85
    • Viewing angle 37.08 13.06 12.43
    • Image height 4.65 4.65 4.65
    • Length Total length 74.93 77.34 76.67
    • BF 3.98 3.98 3.98

And the usual excerpt from the patent literature:

[Claim(s)] [Claim 1] In a zoom lens which performs variable power by having the 1st positive lens group and the 2nd negative lens group, having the 3rd positive lens group and a lens group of succession to the image side, and changing air spacing of each lens group from the object side,
setting air spacing of the aforementioned 1 lens group and said 2nd lens group to telephoto end — a wide angle end — largely
setting air spacing of said 2nd lens group and said 3rd lens group to a wide angle end — telephoto end — largely
Said 1st lens group consists of two lenses, one negative lens and positive lens,
Said 2nd lens group comprises five lenses containing three negative lenses and two positive lenses, and. Said 2nd lens group is 21 lenses more negative than the object side, 22 negative lenses, and 23 positive lenses. A zoom lens comprising a following lens, and said 22 negative lenses and 23 positive lenses comprising a cemented lens which has the plane of composition which turned a convex to the object side, and satisfying the following conditional expressions.
2.5 <f22/f2< 4.0
-7.0 <f23/f2< -3.0
25 <nu22-nu23< 55
f2: A focal distance of the 2nd lens group
f22: A focal distance of the 22nd lens
f23: A focal distance of the 23rd lens
nu 22: An Abbe number of the 22nd lens
nu 23: An Abbe number of the 23rd lens
[Claim 2] The zoom lens according to claim 1, wherein said 2nd negative lens group comprises five lenses, 21 lenses more negative than the object side, 22 negative lenses, 23 positive lenses, 24 negative lenses, and 25 positive lenses, and it satisfies the following conditional expressions.
9 <f1/ fw < 14
-2.5 <f2/fw< -1.0
f1: A focal distance of the 1st lens group
fw: A focal distance of a wide angle end
[Claim 3] The zoom lens according to claim 1 or 2 comprising an object side by the 1st positive lens group of the above, said 2nd negative lens group, the 3rd positive lens group of the above, the 4th negative lens group, and the 5th positive lens group.
[Claim 4] The zoom lens according to claim 1 or 2 which object sides being consisted of by the 1st positive lens group of the above, said 2nd negative lens group, the 3rd positive lens group of the above, the 4th negative lens group, the 5th negative lens group, and the 6th positive lens group.
[Claim 5] The zoom lens according to any one of claims 1 to 4, wherein the 1st positive lens group of the above comprises a cemented lens which joined the 11th lens more negative than the object side and the 12th positive lens.
[Claim 6] The 3rd positive lens group of the above is the 31st positive lens, the 32nd negative lens, and the 33rd positive lens. The zoom lens according to any one of claims 1 to 5 having composition which comprised the 34th negative lens and the 35th positive lens, joined said 32nd lens and the 33rd lens, and joined the 34th lens and the 35th lens, respectively.
[Claim 7] The zoom lens according to claim 3 or 4 constituting said 4th negative lens group from three sheets, the 41st positive lens, the 42nd negative lens, and the 43rd negative lens.
[Claim 8] An imaging device provided with the zoom lens according to any one of claims 1 to 7.

[Egami]

Canon product advisory for PowerShot ELPH 180/IXUS 175

PowerShot ELPH 180

Product advisory for the Canon PowerShot ELPH 180 (IXUS 175 in Europe)

Thank you for using Canon products.

In rare cases, the AF function on some PowerShot ELPH 180 compact digital cameras may not operate properly and focus may not be achieved. Customer support for this phenomenon is described below.

We take great pride in the quality and performance of our products. We offer our sincerest apologies to any customers who may be inconvenienced.

Phenomenon

In rare cases, when shooting still images or movies with the PowerShot ELPH 180 compact digital camera, the AF function on the camera does not operate properly, and focus is not achieved in the captured image or movie, even if the AF frame is displayed.

Affected Products

Only some PowerShot ELPH 180 compact digital cameras are affected by this phenomenon.

The phenomenon may occur in cameras whose  first two digits in its  serial number are “11”, “12” ,“21”,“22”,”23” or”24”.
(Examples of serial numbers for  cameras that may be affected:
“11xxxxxxxxxx” , “12xxxxxxxxx”, “21xxxxxxxxxx”,  “22xxxxxxxxxx”,  “23xxxxxxxxxx”, “24xxxxxxxxxxx”
(‘x’ can be any number)).

PowerShot ELPH 180

If the camera has a black marking on the inside of the battery cover, as shown in the image below, this indicates that your camera has been checked and the issue has been corrected.

PowerShot ELPH 180

Support

If the camera meets the serial number criteria listed above and does not have a black marking on the inside of the battery cover, and if the phenomenon occurs and is confirmed by CUSA we will repair the unit free of charge. If you own one of the affected cameras, please contact our Customer Support Center.

If you have not already done so, please register your PowerShot ELPH 180. By registering, we will be able to notify you via email about future service upgrades.

This information is for residents of the United States and its five territories only. If you do not reside in the USA or its five territories, please contact the Canon Customer Support Center in your region.

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Canon PowerShot SX620 HS compact camera announced

PowerShot SX620 HS

Canon’s PowerShot SX620 HS digital camera, available in black, red and silver, is scheduled to be available in May 2016 for an estimated retail price of $279.99.

Pre-order now: B&H Photo | Adorama | Amazon

Share Memories On The Go With New Compact, Connected PowerShot SX620 HS Digital Camera

Latest Canon PowerShot Digital Camera Provides Impressive Image Quality and Zoom Range in a Compact Size

MELVILLE, N.Y., May 11, 2016 – Canon U.S.A., Inc., a leader in digital imaging solutions, introduced today the new Canon PowerShot SX620 HS digital camera – ideal for individuals looking for a convenient, easy-to-carry compact digital camera capable of producing high-quality photos and videos. This new camera boasts a 20.2 Megapixel* CMOS imaging sensor and a powerful 25X Optical Zoom lens (25-625mm equivalent) in a form factor that will easily fit in a pocket or purse, making it an ideal camera for those passionate about photography to capture gorgeous imagery no matter where they are.

The camera’s built-in wireless capabilities make it convenient to share images and videos on the go, and its powerful 25X optical zoom lens makes it ideal for those wanting to zoom in and out of the action. The Canon PowerShot SX620 HS digital camera is a great companion for those looking to visually document their daily adventures and easily share their experiences as they explore new places and do new things.

As the successor to Canon’s PowerShot SX610 HS digital compact camera, the Canon PowerShot SX620 HS digital camera also features:

  • An Intelligent Image Stabilizer (IS) that helps optimize image stabilization for virtually shake-free images in a variety of shooting conditions
  • Built-in Wi-Fi®** and Near Field Communication (NFC™)*** to allow for easy sharing and transferring of images and videos to a personal computer or other compatible devices such as the Canon Connect Station CS 100
  • 20.2 megapixel* CMOS sensor with DIGIC 4+ Image Processor to help deliver stunning image quality, even in low light
  • The ability to capture spectacular 1080p Full HD video
  • Large 3.0-inch (approximately 922,000 dots) LCD to allow for easy viewing, even from a wide angle
  • Hybrid Auto mode that allows for recording up to four seconds of video before each image that is captured, then automatically combines each clip and still into a quick video recap of the day
  • Smart AUTO mode which intelligently selects the proper settings for the camera based on pre-defined shooting situations to help create the best possible image
  • Creative Shot mode that uses composition, color and lighting from an original image to create unique images with an artistic flair
  • An Auto Zoom feature that, when enabled, makes the camera automatically zoom in on subjects and help keep them in focus

Canon’s PowerShot SX620 HS digital camera, available in black, red and silver, is scheduled to be available in May 2016 for an estimated retail price of $279.991.

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How to disassemble and repair a Canon Powershot G16

iFixit, well known for their teardown and repair instructions for Apple gear (and other stuff too), posted a detailed how to to disassemble (see above or click here) the good old Canon PowerShot G16. And if you need it, they posted repair instructions too.

Canon PowerShot G16: B&H Photo, Amazon USA, Amazon Canada, Canon Canada, Canon USA

Canon Powershot G16 at a glance:

  • 12.1 Megapixel 1/1.7″ CMOS Sensor
  • Canon 5x Optical Zoom Lens (28-140mm)
  • Optical Zoom Viewfinder and 3.0″ LCD
  • Full HD 1080/60p Video
  • DIGIC 6 Image Processing Engine
  • Enhanced Wi-Fi Capabilities
  • Continuous Shooting at 9.3 fps
  • Intelligent IS Image Stabilization
  • ISO 12800 and Canon HS SYSTEM

Powershot g16

Canon patent for 27x zoom Powershot camera (Powershot G3 X replacement?)

powershot

Canon patent for an optical formula that appears to refer to a possible Powershot camera. The patent is about a 9-240mm F2.8-5.6 lens that seems to fit a compact camera, a Canon Powershot. The optical formula resolves to a 27x zoom. 

The Canon PowerShot G3 X has a 25x zoom (24-600mm equivalent). May this patent refer to a replacement? It may be.

  • Patent Publication No. 2016-31419
    • Published 2016.3.7
    • Filing date 2014.7.28
  • Example
    • Zoom ratio 25.58
    • Wide-angle intermediate telephoto
    • Focal length 9.35 31.90 239.12
    • F-number 2.88 4.93 5.76
    • Half angle of view (degrees) 35.66 13.89 1.89
    • The image height 6.71 7.89 7.89
    • Overall length of the lens 94.81 119.61 197.21
    • BF 2.97 19.89 29.86
powershot g3 x
Canon Powershot G3 X
[via Egami]