Nikon working on full-frame mirrorless camera, patents suggest (and where is Canon’s?)

mirrorless

Patent for 50mm f/0.9 lens

While the Canon community is eagerly waiting to know more (or at least something really reliable) about the long rumored (and much wished) Canon full-frame mirrorless camera (all rumors), we learn that Nikon is also working on such a camera.

Two Nikon patents for 50mm f/0.9 and 35mm f/1.2 lenses specifically designed to be featured on a full-frame mirrorless camera have been spotted. It is a hint that Nikon has such a camera on a blueprint at least.

We found similar patents filed by Canon in the past (1 | 2), and even a patent for an EF/EF-S adapter for a full-frame mirrorless camera. I just wish we would know something more. The latest rumor regarding Canon’s full-frame mirrorless camera is here, I sum it up:

  • Different sources and sites were reporting that early prototypes exist, at least to be tested inside Canon’s labs. This intel came in 2016 and early 2017.
  • Canon is possibly working on a full-frame mirrorless camera with EF mount. There have been rumors saying that Canon is delaying this camera because of issues in implementing the EF mount. There is a lot of talk about this. If Canon manages to engineer a full-frame mirrorless camera with EF mount, thus allowing us to use our beloved EF lenses on a smaller and hopefully performing body, it will be a winner. Imagine what you could do with a MILC that goes along with your EF lenses. There is serious a chance we may see this.
  • The latest bit of info I got suggests Canon will announce a full-frame mirrorless camera with a sensor having a resolution of 36-38MP.
  • A possible announcement date is around Photokina 2018, which happens in September.
  • And for all those 4K fans out there: we have been told that, yes!, most likely it will feature 4K video.

Do you think we will see a Canon full-frame mirrorless camera in 2018?

View Results

Loading ... Loading ...

Does this Canon patent for a 15-43mm f/2-4 lens for APS-C sensors refer to the Powershot G1 X Mark III?


Very interesting patent for 15-43mm f/2-4 lens for APS-C sensors that may point to the upcoming Canon Powershot G1 X Mark III camera, rumored to have an APS-C sensor.

  • Zoom ratio: 2.74
  • Focal length: 15.65 29.18 42.90
  • F No.: 2.06 2.99 4.00
  • Half angle: 41.12 25.09 17.66
  • Image height: 13.66 13.66 13.66
  • Back focus: 8.52 8.01 7.20

Patent literature is hard to grasp. Any help is welcome.

In a zoom lens from which an interval of a lens group which comprises the 1st lens group of negative refracting power, the 2nd lens group of positive refracting power, the 3rd lens group of positive refracting power, the 4th lens group of negative refracting power, and the 5th lens group of positive refracting power, and is adjacent to on the occasion of zooming arranged in order from the object side to the image side changes, between said 2nd lens group and the 3rd lens group, have an aperture diaphragm and said 4th lens group moves on the occasion of focusing — said 4th lens group — most — a curvature radius of a lens surface on the object side — a time of setting a curvature radius of a lens surface on the image side to R4b most of R4a and said 4th lens group, 0.2<(R4b+R4a)/(R4b-R4a)<3.0 A zoom lens satisfying a becoming conditional expression.


[via Hi Lows Note]

Canon patent to reduce flare in Diffractive Optics

Canon patent
Interesting Canon patent to reduce flare in difrractive optical elements. Let’s start with the abstract:

Basically, this means that an aluminium coating is applied to diffractive lens elements, in order to reduce light scattering. The aluminium layer is applied with an angle (you see it in the pictures), and is then partially oxidised so that the aluminium coating becomes transparent. According to the patents claim, flare is massively reduced (up to eight times).

Some more “patentish language”:

Canon patent
Canon patent

Yet another Canon patent for a curved sensor design

curved sensor

Another Canon patent for a curved sensor design. The fourth if I am not wrong, previously: 1 | 2 | 3

  • Patent publication number 2016-213571
    • Release date 2016.12.15
    • Application date 2015.4.30
  • Canon patent
    • Curved state based on the measurement result of the bending state to control the
    • Measurement method is pressure sensor, laser light

For those who dare: after the break you can read a machine translated excerpt from the patent literature.

[via Egami]
Click here to read the rest of the article

Canon patent for 12-60mm f/2-4 lens for 1.5″ sensors (PowerShot G1 X Mark III?)

Canon Patent For 12-60mm F/2-4 Lens For 1.5″ Sensors (PowerShot G1 X Mark III?)

Canon patent for an optical formula for a 12-60mm f/2-4 lens for 1.5″ sensors. This resolves to 24-105mm on 35mm equivalent. The PowerShot G1 X Mark II has an 1.5″ sensor, and a similar lens. Does this patent refer to the Powershot G1 X Mark III?

  • Patent publication number 2016-212248
    • Release date 2016.12.15
    • Application date 2015.5.8
  • Example
    • Zoom ratio 4.72
    • Focal length 12.84 20.16 60.62
    • F number 2.06 3.50 4.02
    • Half angle of view (degree) 41.74 28.80 10.33
    • Image height 9.22 10.23 11.25
    • Lens total length 83.06 84.07 101.55
    • BF 8.02 12.32 13.44
powershot g1 x mark ii

Is this patent referring the next iteration of the PowerShot G1 X series?

Excerpt for the patent literature (machine translated):

[Claim(s)] [Claim 1] In order, it comprises an object side to the image side from a rear group which has the 1st lens group of positive refracting power, the 2nd lens group of negative refracting power, the 3rd lens group of positive refracting power, and one or more lens groups,
It is a zoom lens from which an interval of said 1st lens group and said 2nd lens group spreads on the occasion of zooming from a wide angle end to telephoto end, and an interval of a lens group in which an interval of said 2nd lens group and said 3rd lens group is adjacent to on the occasion of narrowing and zooming changes,
Said 1st lens group has a positive lens and a negative lens,
When an Abbe number of material of a positive lens contained in said 1st lens group is set to nu1p and relative partial dispersion is set to thetagF1p, it is said 1st lens group,
nu1p<60.0
1.571×10 -5xnu1p2-3.437×10 -3xnu1p+6.976×10 -1<thetagF1p
It has the positive lens G1p with which it is satisfied of a becoming conditional expression,
When an Abbe number of material of a negative lens contained in said 1st lens group is set to nu1n and relative partial dispersion is set to thetagF1n, it is said 1st lens group,
nu1n<27.0
thetagF1n<-2.750×10 -3xnu1n+6.820×10 -1
It has the negative lens G1n with which it is satisfied of a becoming conditional expression,
When setting a focal distance of the whole system [ in / for a focal distance of the aforementioned positive lens G1p / f1p and a wide angle end ] to fw,
2.6<f1p/fw<30.0
A zoom lens satisfying a becoming conditional expression.
[Claim 2] When setting an aforementioned negative lens [ G1n ] focal distance to f1n,
-50.0<f1n/fw<-6.0
The zoom lens according to claim 1 satisfying a becoming conditional expression.
[Claim 3] When setting a focal distance of d1n and said 1st lens group to f1 for aforementioned negative lens [ G1n ] center thickness,
0.005<d1n/f1<0.050
The zoom lens according to claim 1 or 2 satisfying a becoming conditional expression.
[Claim 4] When setting a focal distance of d1p and said 1st lens group to f1 for center thickness of the aforementioned positive lens G1p,
0.030<d1p/f1<0.200
A zoom lens of a description in any 1 item of Claims 1-3 satisfying a becoming conditional expression.
[Claim 5] When the aforementioned positive lens G1p is arranged at the aforementioned negative lens [ G1n ] image side and a focal distance of d1a and said 1st lens group is set to f1 for distance on an optic axis from a lens surface on the image side which is the aforementioned negative lens G1n to a lens surface on the object side of the aforementioned positive lens G1p,
0.002<d1a/f1<0.070
A zoom lens of a description in any 1 item of Claims 1-4 satisfying a becoming conditional expression.
[Claim 6] In a zoom lens of a description in any 1 item of Claims 1-5,
-0.002<(thetagF1n-thetagF1p)/(nu1 n-nu 1p) <0.002
A zoom lens satisfying a becoming conditional expression.
[Claim 7] When setting a refractive index of aforementioned negative lens [ G1n ] material to N1n,
1.77<N1n
A zoom lens of a description in any 1 item of Claims 1-6 satisfying a becoming conditional expression.
[Claim 8] When setting a focal distance of said 1st lens group to f1,
3.0<f1/fw<50.0
A zoom lens of a description in any 1 item of Claims 1-7 satisfying a becoming conditional expression.
[Claim 9] When setting a focal distance of said 2nd lens group to f2,
-5.0<f2/fw<-0.5
A zoom lens of a description in any 1 item of Claims 1-8 satisfying a becoming conditional expression.
[Claim 10] When setting a focal distance of said 3rd lens group to f3,
1.3<f3/fw<8.0
A zoom lens of a description in any 1 item of Claims 1-9 satisfying a becoming conditional expression.
[Claim 11] When setting movement magnitude of said 1st lens group for zooming from a wide angle end to telephoto end to M1,
-20.0<M1/fw<-0.7
A zoom lens of a description in any 1 item of Claims 1-10 satisfying a becoming conditional expression.
[Claim 12] When setting movement magnitude of said 3rd lens group for zooming from a wide angle end to telephoto end to M3,
-6.0<M3/fw<-0.1
A zoom lens of a description in any 1 item of Claims 1-11 satisfying a becoming conditional expression.
[Claim 13] A zoom lens of a description in any 1 item of Claims 1-12, wherein the aforementioned rear group comprises an object side in order to the image side from the 4th lens group of negative refracting power, and the 5th lens group of positive refracting power.
[Claim 14] A zoom lens of a description in any 1 item of Claims 1-12, wherein the aforementioned rear group comprises the 4th lens group of positive refracting power.
[Claim 15] A zoom lens of a description in any 1 item of Claims 1-12, wherein the aforementioned rear group comprises an object side in order to the image side from the 4th lens group of positive refracting power, the 5th lens group of negative refracting power, and the 6th lens group of positive refracting power.
[Claim 16] A zoom lens of a description in any 1 item of Claims 1-12, wherein the aforementioned rear group comprises an object side in order to the image side from the 4th lens group of positive refracting power, and the 5th lens group of negative refracting power.
[Claim 17] An imaging device comprising:
A zoom lens of a description in any 1 item of Claims 1-16.
An optoelectric transducer which carries out light reception of the image formed by the zoom lens.

[via Egami]