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By admin, on October 19th, 2014
Canon filed a new patent for a new Lens Extender EF2x that employs DOE ( possibly enhanced diffractive optical element ) that minimizes Spherical aberration, astigmatism, other distortion and chromatic aberration caused by magnification of the lens extender.
Lens Patent Details
Explanation and self-interpretation of the patent literature
Patent Publication No. 2014-145870
Published 2014.8.14
Filing date 2013.1.29
Example 1
- Focal length -109.09mm
- Magnification 2.00x
- Lens configuration 4 group nine
- Diffractive surface 1 surface (the first group)
Master lens
- Focal length f = 293.76mm
- Fno. 2.91
- Half angle of ω = 4.21 °
- Image height Y = 21.64mm
- Lens length 275.41mm
- BF 53.79mm
- Lens configuration 11 group 15 sheets
- Protective glass 1
- Rear filter 1
- UD 2
- Fluorite 1
Canon patent of
- The most the joint surface on the object side of the cemented lens I to the diffraction plane
- This arrangement can suppress the flare
via-egami
By admin, on October 12th, 2014
Canon Ultra wide 11-24 f/4L Lens was earlier expected to announced on Photokina but it was delayed due to unexpected reasons, now according to latest rumors Canon is fully prepared to announce the new lens on November.. the expected price of this lens is $3000.
As you already know that Canon another large sensor compact camera is also rumored to announce soon, so it is possible that canon may announce a bunch of new products this November…
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By admin, on July 29th, 2014
Canon 180mm F3.5 Macro DO patent surfaced over the web today, the patent publication was registered at 2013.1.17, take a look at the details below
Explanation and self-interpretation of the patent literature
- Patent Publication No. 2014-137484
- Published Date 2014.7.28
- Filing date 2013.1.17
- Example 1
- Focal length f = 180.00mm
- Shooting magnification ∞ 0.5x 1.0x
- Fno. 3.50-4.50-5.20
- Half angle ω = 6.85 °
- Image height 21.64mm
- The overall length of the lens 202.38mm
- BF 52.18mm
- Effective diameter of the front lens 58.18mm
- 12 sheets 8 groups lens configuration
see more DO lens patent from Canon – Canon Patents 70-300mm, 100-400 mm F4.5-5.6 DO Lens and see all Canon Patents
By admin, on July 13th, 2014
 Image of current Canon EF 100-400mm f/4.5-5.6L IS USM Lens – see at Amazon | B&H
The Canon Upcoming 100-400mm lens specification leaked today, the upcoming lens will feature New Image Stabilization system, improved optics and new lens coating. The lens will cost you approx $2399 USD and weight less compared to its predecessor.
The 100-400mm is rumored to announced with Canon 7D Mark II on September 5, 2014.
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src – cr.com
By admin, on July 7th, 2014
It’s look like Canon already removed the MAP (Minimum advertised price) pricing from Canon 7D, that’s why the 7D body is now available at $300 less than its MSRP see here, earlier we have also published the NDA (Non Disclosure Agreement) on 7D Mk II camera will possibly ends on September 5, 2014… and according to latest rumors surfaced over the web today, Canon will possibly announce Canon 7D Mark II on September 5 and its official announcement will be followed on Photokina show starting from September 15, 2014.
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src – CR.com
By admin, on June 21st, 2014
After Canon Patent News: 500mm f/4 DO, 500mm f/5.6 DO, 600mm f/4 DO, 800mm f/5.6 DO Lenses patent and Canon Patents 70-300mm, 100-400 mm F4.5-5.6 DO Lens Patent now we have Canon EF 400 f/4 DO IS patent information, it has been really a long time since we have seen any real DO lens announcement.
Canon Patent Details Translated by Google
- Patent Publication No. 2014-109700
- Publication date 2014.6.12
- Filing date 2012.12.3
- Example 1
- Focal length f = 392.00-381.59-332.99mm
- Fno.
- Half angle ω = 3.16-3.10-2.81 °
- Image height Y = 21.64mm
- The overall length of the lens 292.02mm
- BF 105.64mm
By admin, on June 19th, 2014
A latest patent surfaced over the web that shows latest patent of EF 100-400 f/4.5-5.6 STM Lens, there is also a patent document of already announced EF-S 55-250 f/4-5.6 IS STM lens, so finally we have a strong hope that Canon Patent EF 100-400 f/4.5-5.6 STM Lens can be announced on Q4 of 2014 or along with Canon 7D Mark II.
Take a look at the patent details below
- Patent Publication No. 2014-102462
- Publication date 2014.6.5
- Filing date 2012.11.22
- Example 1
- Zoom ratio 4.24
- Focal length f = 56.90-133.00-241.28mm
- Fno. 4.12-5.04-5.83
- Half angle ω = 13.50-5.86-3.24 °
- Image height 13.66mm
- 154.33-176.38-191.20mm overall length of the lens
- BF 41.21mm
- Example 5
- Zoom ratio 3.73
- Focal length f = 104.59-199.99-389.99mm
- Fno. 4.58-5.03-5.87
- Half angle ω = 11.69-6.17-3.18 °
- Image height 21.64mm
- 245.09-285.06-308.91mm overall length of the lens
- BF 68.73mm
via-egami
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