Canon Patent: 16mm f/2.8 & 20mm f/2.8 With Image Stabilization

Canon Patent

A new Canon patent to start a new week. Once more for lenses for the RF mount.

Canon patent 2022125455 (Japan, published 8/29/2022) discusses optical formulas for two prime lenses, a 16mm f/2.8 and a 20mm f/2.8, both with image stabilisation. From the patent literature (machine translated):

[Title of Invention] Optical system, lens device having the same, and imaging device

The present invention provides an optical system having a wide angle of view, a small size and light weight, and high optical performance in the non-stabilizing state while suppressing peripheral image quality deterioration during image blur correction, and a lens device and an imaging device having the same.

Description of the Related Art

Conventionally, as means for correcting image blurring, there are known a lens-shift type anti-vibration mechanism that shifts a part of an optical system and a sensor-shift type anti-vibration mechanism that shifts an imaging device. In a central projection optical system, the amount of movement of the image point in response to changes in the angle of incidence of light rays entering the optical system is not uniform on the imaging surface. However, image blur remains around the imaging surface.

The imaging apparatus of Patent Document 1 can correct image blur at a specific image point position, but cannot uniformly correct image blur at all angles of view.

In an equidistant projection optical system, the image quality around the imaging surface is less likely to deteriorate during image blur correction. Therefore, in order to suppress image quality deterioration around the imaging surface, it is necessary to generate a large amount of distortion in the negative direction in the central projection method, and reduce the absolute value of the amount of distortion in the equidistant projection method.

An optical system with a large absolute value of the amount of distortion aberration in the central projection method produces a greatly distorted image, so it is often used in combination with an imaging apparatus equipped with electronic distortion correction. In this case, if the distortion aberration in the central projection method is excessively generated, the image quality around the imaging surface is degraded due to the extension of the electronic distortion correction.

Example 1

  • Focal length: 24.22
  • F-value: 1.85
  • Image height: 19.38
  • Overall length: 85.24
  • Back focus: 12.06

Example 2

  • Focal length: 19.48
  • F value: 2.88:
  • Image height: 18.60
  • Overall length: 73.01
  • Back focus: 12.19

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

[via asobinet]

Are These The Canon EOS R100 Specifications (almost same as already rumored)?

Canon Eos R5 Mark Ii Canon EOS R6 Mark Ii Rf Mount Eos R6 Mark Ii Rf 300mm Rf 35mm Canon Eos R100 Rf 24mm F/1.8 Rf-s Canon Eos R7 Eos R100 Canon High Resolution Eos R R10 Eos C5 Canon Eos R1 Eos R5c Canon Rf 16mm Rf 35mm F/1.2L EF Lenses Tilt-shift Lenses Rumor

Some new bits about the Canon EOS R100, an upcoming entry level Canon mirrorless camera we reported about back in June, 2022.

The now surfaced, alleged Canon EOS R100 specifications are slightly different from the specifications we posted June, 2022. Here are both specification lists (left the newly rumored and right the one we posted in June:

Newly rumored EOS R100 specsEOS R100 specifications posted in June
– 24.2mp APS-C Sensor
– DIGIC X
– 12fps (Mechanical)
– 4K30p
– Dual Pixel AF II
– 1.04 4million dot  Vari-Angle Touchscreen
– No EVF
– 24.2 million pixel APS-C CMOS sensor
– 4k 30p 8bit
– No HDR PQ mode like the EOS R10
– 14fps continuous shooting speed
– 3.0-inch 1.04 million dot vari-angle monitor
– Scheduled to be released Q1 or Q2 2023

We can’t see much new intel in the new list, besides the obvious. That a very entry level mirrorless camera might have no EVF doesn’t come as a surprise. As you can see the suggested resolution hasn’t changed. Nothing to write home about.

Stay tuned, or even better go out ans snap pics ;-)

Source: Canon Rumors

Do You Think Canon Made A Huge Mistake?

Viltrox Eos R7 Eos R10 Canon Cameras Europe Canon Eos R1 Eos R Rf 14-35mm Olympic Games Ef-mount Rudy Winston

Did Canon make a huge mistake when they told Viltrox not to market auto-focus lenses for the RF mount?

The reason for Canon’s reaction are patent infringements, i.e. violation of Canon’s intellectual property. So, was this a dumb move, besides being an overzealous move? Me thinks third party RF mount lenses would benefit the EOS R system as a whole. But who am I to judge?

Christopher Frost posted a video-essay where he analyses and discusses Canon’s decision. The video lasts 7 minutes and is definitely worth your time.

Share your thoughts in the comment section.

Canon EOS R7 Review (lot of camera for reasonable money, D. Abbott)

Canon Eos R7 Review

Here is a Canon EOS R7 review. The Canon EOS R7 is Canon’s first APS-C mirrorless camera with RF mount and users and reviewers seem to love it.

At a glance:

  • 32.5MP APS-C CMOS Sensor
  • Dual Pixel CMOS AF II
  • 4K60 10-Bit Video, HDR-PQ & C-Log 3
  • 30 fps E. Shutter, 15 fps Mech. Shutter
  • 2.36m-Dot OLED EVF
  • 1.6m-Dot Vari-Angle Touchscreen LCD
  • Sensor-Shift 5-Axis Image Stabilization
  • Dual UHS-II Memory Card Slots
  • Multi-Function Shoe, Wi-Fi and Bluetooth
  • RF-S 18-150mm f/3.5-6.3 IS STM Lens

Dustin Abbott posted his comprehensive Canon EOS R7 review. From his conclusion:

[…] the Canon EOS R7 is a lot of camera for a reasonable amount of money.  It has a lot going for it, from the blistering burst rate in either mechanical (3FPS faster than the EOS R3) or electronic shutter mode to the excellent, high resolution 32.5MP sensor.  This is a tool that makes it easy to capture images in a wide variety of situations.

The focus system is largely borrowed from the EOS R3, which means that it is among Canon’s best, and the great focus and blistering frame rate is held back only by buffers that fill a little too quickly.

Canon does ergonomics extremely well, and the EOS R7 feels great in the hand and is intuitive to operate.

At a price point of $1499 USD, this is the spiritual successor of the very popular 7D series.  It is reborn in mirrorless form and is all the better for it.  The EOS R7 does things the 7D could only dream of, and despite a decade of inflation since the last 7D model, the price remains the same.  Canon has jumped into the RF APS-C space very ably, but now they need to fully commit with a wide range of RF-S lenses that will make the system – and not just the camera – competitive.

Read the whole review at Dustin Abbott’s website…

As usual, Dustin Abbott’s reviews come with test charts, sample pics, dynamic range tests, and much more. D. Abbott also provides a video-review that someone might prefer to the written review. It’s here for your viewing pleasure.

More Canon EOS R7 information, reviews and more is listed here.

Canon EOS R7:

America: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA
Europe & UK: Amazon DE, Amazon UK, Amazon IT, Wex Photo Video, Canon DE, Canon UK

This Canon EOS 5D Mark II Has More Than 2.2 Million Shutter Actuations

Eos 5d Mark Ii

Call it a venerable camera, call it the legendary Canon EOS 5D Mark II (released in 2008), call it whatever you want but do not forget that this camera has almost 2.3 million shutter actuations. Not bad, eh?

User FoxTailWhipz posted a video on YouTube where he presents this truly venerable piece of gear. He says:

Make sure to watch until the end for some crazy statistics! Have you ever seen a camera with this high of a shutter count??

Enjoy the video.

Anyone here with a Canon camera that has more shutter actuations? Let me know and I might post about it.

[via DPReview]