Sigma Patent: 70-200mm f/4 DG DN OS Lens For FF Mirrorless Cameras

Sigma Patent

A Sigma patent application for a 70-200mm lens for full frame mirrorless cameras. Let’s hope for the EOS R system too.

Sigma patent application 2020-86133A discusses the optical formula for a 70-200mm DG DN OS lens , “OS” being Sigma’s denomination for in lens image stabilization.

  • Zoom ratio: 2.68
  • Focal length: 72.50 118.13 193.95 mm
  • F number: 4.00 3.99 4.00
  • Angle of view: 33.22 20.36 12.38
  • Image height: 21.63 21.63 21.63 mm
  • Lens length: 200.60 200.60 200.60 mm

Canon patent applications are listed here.

Canon Patent Application: IBIS and Lens IS Working Together

Canon Patent

Here is another Canon patent application dealing with how to make IBIS (In Body Image Stabilisation) and lens IS work together smoothly.

Canon patent application 2019-215426 (Japan) discusses the possibility of a change in the composition that occurs when IBIS and lens IS are working together. If both are working only while shooting, the resulting composition might be slightly shifted compared to what was seen in the viewfinder.

Although the camera in the image on top resembles more a DSLR than a MILC, we think this patent application too will find its way in a future EOS R camera body. We expect two new EOS R cameras in Q1 and Q2 2020, will this technology be already on board?

We have no doubts that Canon will feature IBIS on future cameras, given the remarkable collection of patent applications dealing with it and the fact that a Canon exec told the world about. And it’s very likely that the first Canon camera to feature it will be mirrorless.

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Source: Canon News

Canon Patent For Various RF Mount Zoom Lenses

Canon Patent

Canon patent application US20190369372 discusses optical formulas for various zoom lenses for the Canon EOS R system.

Among the discussed optics in this Canon patent application is a 28-280mm f/2.8 lens. All lenses seem to be designed for the EOS R full frame mirrorless system.

A zoom lens includes, in order from an object side, a positive first unit, a negative second unit, a positive intermediate group consisting of one or two units and including a third unit located on a most object side, a negative unit, and a rear group consisting of one or two units including a positive unit located on a most object side. Conditional expressions are satisfied with respect to amounts of movement of the second and third units from a wide angle end to a telephoto end, a distance at the wide angle end from a most object side surface vertex in the first unit to a most object side surface vertex in the third unit, an Abbe number of a most object side lens in the first unit, a focal length of the second unit, and focal lengths at the wide angle end and at the telephoto end.

[…]

A zoom lens of the disclosure includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, an intermediate lens group having a positive refractive power and including one or two lens units inclusive of a third lens unit located on an object side, a lens unit having a negative refractive power, and a rear lens group including one or two lens units inclusive of a lens unit which is located on the object side and has a positive refractive power, which are arranged in order from the object side to an image side. Here, an interval between every two adjacent lens units is configured to be variable for zooming. In the meantime, a total length of the zoom lens is reduced by keeping the first lens unit unmoved relative to an image plane while varying the intervals between the lens units during the zooming. The first lens unit includes three or more lenses and mainly corrects a spherical aberration and an axial chromatic aberration on a telephoto side. The second lens unit includes three or more lenses and mainly suppresses variations in curvature of field and in chromatic aberration of magnification during the zooming. In order to achieve correction of aberrations and reduction in size at the same time, it is preferable to form each of the first lens unit and the second lens unit by use of three or four lenses. 

canon patent

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Source: Canon News

Wireless Charging Might Come To Canon Cameras In The Future

Canon

Canon patent application US10375639 discusses technology to wireless charge a battery. Looking at the patent’s images, it seems that the patent clearly refers to wireless charging a camera’s battery.

Patent abstract:

A power transmission apparatus includes a communication unit that executes communication with an electronic apparatus, a power transmission unit that wirelessly supplies power to the electronic apparatus, and a control unit that controls communication and power supply to be executed alternately, wherein the control unit adjusts communication power of the communication unit and transmission power of the power transmission unit and/or a length of a communication period and a length of a power transmission period, so that an average magnetic field intensity does not exceed a first magnetic field intensity in a predetermined region throughout the communication period of communication executed by the communication unit and the power transmission period of power transmission executed by the power transmission unit.

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Canon Patent For A Lens Cap That Might Be Pretty Difficult To Lose

Canon Patent

Canon patent application 2019-113645 describes a design for a lens cap that might once for all solve the issue with lost lens caps.

The lens cap described in the Canon patent opens (and closes) without being removed form the lens. There is more: the lens cap is a lens cap when closed and becomes a lens hood when opened. Pretty smart.

The present invention works as a lens hood function at the time of shooting and as a lens protection function at the time of non-shooting, thus eliminating the need for lens cap attachment / removal and barrier opening / closing operations.

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Source: Canon News

Canon Researching How To Make IBIS and Lens IS Work Together Smoothly, Patent Suggests

Ibis Canon Rumors Canon Full Frame Mirrorless Canon PowerShot G7 X Canon Eos 90d Coronavirus

Canon patent application 2019-087397 (Japan) discusses how to make IBIS (In Body Image Stabilisation) work with lens-based image stabilisation. Not an easy task, I guess.

This is not the first IBIS-related patent filed by Canon. It’s now safe to assume that Canon will indeed implement IBIS in a future mirrorless camera (both EOS M and EOS R?).

Given the quantity of Canon lenses with IS it was to expect that Canon is interested to make IBIS wok with image-stabilised lenses.

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these: