Canon Patent: Canon RF 28-70mm f/2.8 IS STM (the released lens?)

Canon Patent

Here is a new Canon patent, and it appear it is referring to the recently released RF 28-70mm f/2.8 IS STM lens.

Canon patent 2024140521 (Japan, published 10/10/2024) discusses optical formulas for a 28-70mm f/2.8 IS STM lens for the RF mount.

From the patent literature:

  • The present invention provides a zoom lens that has high optical performance, a high zoom ratio, and is compact.
  • Description of the Related Art
    In recent years, imaging optical systems used in imaging devices have been required to have high optical performance, a high zoom ratio, and a small size.
  • The zoom lens of Patent Document 1 has a lens group arranged in the order of positive, negative, positive, positive, negative, positive, from the object side to the image side. However, since the refractive power of the second lens group is strong, the chromatic aberration of magnification at the wide-angle end tends to become large, and the fluctuation of the curvature of field occurring during zooming tends to become large .
  • SUMMARY OF THE PRESENT EMBODIMENTS: An object of the present invention is to provide a zoom lens which has high optical performance, a high zoom ratio and is compact.

Example 1

  • Focal length: 28.80-67.90
  • F-number: 2.88-2.92
  • Half angle of view: 34.93-17.67
  • Image height: 21.64
  • Total length: 132.38-158.83
  • Back Focus: 15.39-34.87

More Canon patents are listed here.

[via asobinet]

Canon EOS R5 Mark II Disassembly And Teardown

Canon EOS R5 Mark II

Here is something cool for the tech nerds out there: A full teardown and disassembly of the Canon EOS R5 Mark II by Kolari Vision.

Canon EOS R5 Mark II at a glance:

  • 45MP Full-Frame Stacked BSI CMOS Sensor
  • DIGIC Accelerator Processing
  • Dual Pixel Intelligent AF, Eye Control
  • 8K 60 Raw/4K 60 SRAW/4K 120 10-Bit Video
  • Up to 30 fps, Pre-Continuous Shoot Mode
  • 5.76m-Dot EVF with OVF Sim. View Assist
  • 3.2″ Vari-Angle Touchscreen LCD
  • In-Camera Upscaling to 179MP
  • CFexpress & SD UHS-II Memory Card Slots
  • Wi-Fi 6E / Wi-Fi 6 Support

And here is the full teardown in 3 minutes:

Canon EOS R5 Mark II reviews are listed here.

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HOT deal: Datacolor SpyderX Pro Colorimeter – $99 (reg. $149)

SpyderX Pro

Superb deal by B&H Photo on the Datacolor SpyderX Pro Colorimeter.

At a glance:

  • Precise Screen Color and White Balance
  • Lens-Based Color Engine Technology
  • Single-Click Wizard Calibration
  • Display Mapping and Analysis Tools
  • 12 Predefined Calibration Targets
  • Color Profile and Settings Switching
  • Ambient Light Monitoring
  • Multiple Monitor Support
  • Before-and-After Evaluation
  • For Mac and Windows Operating Systems

Get the Datacolor SpyderX Pro Colorimeter on sale at $99. Compare at $149. Please note: this is not their latest model, that would be the Spyder X2, but this one works as well and is a bargain.

More selected deals:

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Canon Patent: Lens Design Based On EF 135mm f/2

Canon patent

A new Canon patent application for a lens that seems based on the optical design of the EF 135mm f/2.

Canon patent application 2024133316 (Japan, published 10/1/2024) discusses optical formulas for a 135mm f/2 lens.

From the patent literature:

  • Patent Document 1 discloses an optical system in which various aberrations such as chromatic aberration are effectively corrected by appropriately arranging a positive lens made of a material with a small Abbe number (high dispersion material).
  • According to the present invention, it is possible to provide an optical system and an imaging device which are small in size and in which various aberrations such as chromatic aberration are well corrected.

Example 1

  • Focal length: 130.77
  • F-number: 2.06
  • Half angle of view: 9.39
  • Image height: 21.64
  • Overall length: 132.51
  • Back focal length: 25.26

Example 2

  • Focal length: 130.46
  • F-number: 2.06
  • Half angle of view: 9.42
  • Image height: 21.64
  • Overall length: 146.16
  • Back focal length: 17.93

More Canon patents are listed here.

[via asobinet]

Canon Firmware Updates: EOS R3, R5, R5 Mark II, R6, R6 Mark II, R7, R8, R10, R50, R100

canon eos r3 review canon cameras eos r1

Canon released a huge set of firmware updates. Download links and description below.

  • EOS R3 Firmware Update, Version 1.8.0
    • Adds [Protect Images] and [Rating] during FTP Transfer.
    • Adds the ability to select [Wired] as a connection option when [Airplane mode] is set to [On].
    • The following issues have been fixed.
    • Fixes an issue, in which when Wi-Fi is disconnected, Err 70 occurs.
    • Fixes an issue, in which when shooting subjects that are smaller in the frame, the card access indicator blinks and operations can no longer be performed.
    • Fixes an issue, in which while operating both the touch function on the LCD monitor and a customized button, and then performing shooting, operations can no longer be performed.
    • Fixes an issue, in which when performing shooting in high-speed continuous shooting + mode with the [Highlight Tone Priority] option set to [ON], focus may not be achieved when certain ISO speed settings are used.
  • EOS R5 Mark II Firmware Update, Version 1.0.1
    • Fixes an issue in which movies captured in RAW/SRAW format may not play back properly on applications due to the attached lens and camera not communicating.
    • Improves the stability of the touch operation control when the [Touch control] is set to [Sensitive].
    • Fixes an issue in which the camera’s LCD display may become abnormal after the camera resumes operations from the [Viewfinder off] state.
    • Fixes an issue in which the camera may stop working properly when the shutter button is operated while the BUSY message is being displayed on the screen.
    • Fixes an issue in which Err70 may be displayed when the display mode is switched between the LCD screen and viewfinder while the BUSY message is being displayed on the screen.
    • Fixes an issue, in which the camera’s LCD display becomes abnormal after using EOS Utility to capture and import movies.
    • Fixes an issue, in which movies captured using EOS Utility may not be played back on the camera.
    • Optimizes the auto white balance for specific environments when the Custom Picture function is set to [On].
  • EOS R5 Firmware Update, Version 2.1.0
    • Enables functions to be used without limitation in conjunction with the new Battery Pack LP-E6P.
    • This makes it possible to shoot at the same continuous shooting speed as when using LP-E6NH.
    • In-camera charging of LP-E6P is also supported.
    • Adds [Protect Images] and [Rating] during FTP Transfer.
    • The following issues have been fixed.
    • Fixes an issue, in which when Wi-Fi is disconnected, Err 70 occurs.
    • Fixes an issue, in which when shooting subjects that are smaller in the frame, the card access indicator blinks and operations can no longer be performed.
    • Fixes an issue, in which when performing shooting in high-speed continuous shooting + mode with the [Highlight Tone Priority] option set to [ON], focus may not be achieved when certain ISO speed settings are used.
  • EOS R6 Mark II Firmware Update, Version 1.5.0
    • Enables functions to be used without limitation in conjunction with the new Battery Pack LP-E6P.
    • This makes it possible to shoot at the same continuous shooting speed as when using LP-E6NH.
    • In-camera charging of LP-E6P is also supported.
    • Adds [Protect Images] and [Rating] during FTP Transfer.
    • Adds support for the “Peripheral Coordinated Control”. Peripheral Coordinated Control is now always performed when a compatible lens is attached (there is no need to set it on the menu screen). * Peripheral Coordinated Control is a function that reduces changes in distortion around the periphery of the image caused by camera shake, which tends to occur with wide-angle lenses.
    • The following issues have been fixed.
    • Fixes an issue, in which when performing continuous shooting using the electronic shutter with both the [High-Frequency Anti-Flicker Shooting] and [OVF sim. view assist] options set to [On], Err 70 may occur.
    • Fixes an issue, in which when Wi-Fi is disconnected, Err 70 occurs.
    • Fixes an issue, in which when performing shooting in high-speed continuous shooting + mode with the [Highlight Tone Priority] option set to [ON], focus may not be achieved when certain ISO speed settings are used.
  • EOS R6 Firmware Update, Version 1.9.0
    • Enables functions to be used without limitation in conjunction with the new Battery Pack LP-E6P. This makes it possible to shoot at the same continuous shooting speed as when using LP-E6NH.
    • In-camera charging of LP-E6P is also supported.
    • The following issues have been fixed.
    • Fixes an issue, in which when performing shooting in high-speed continuous shooting + mode with the [Highlight Tone Priority] option set to [ON], focus may not be achieved when certain ISO speed settings are used.
    • Fixes an issue, in which when shooting subjects that are smaller in the frame, the card access indicator blinks andoperations can no longer be performed.
  • EOS R7 Firmware Update, Version 1.6.0
    • Enables functions to be used without limitation in conjunction with the new Battery Pack LP-E6P.
    • This makes it possible to shoot at the same continuous shooting speed as when using LP-E6NH.
    • In-camera charging of LP-E6P is also supported.
    • Adds the ability to select [WPA2] and [WPA3] as a secured protocol.
    • Adds support for the Software Development Assistance Kit (EDSDK/CCAPI).
    • The following issues have been fixed.
    • Fixes an issue, in which when SPEEDLITE EL-5, EL-10 is attached, the “Accessory unavailable status” message may be displayed when restarting after the camera has gone into Auto Power Off. (Only occurs with firmware Ver.1.5.0)
    • Fixes an issue, in which when performing shooting in high-speed continuous shooting + mode with the [Highlight Tone Priority] option set to [ON], focus may not be achieved when certain ISO speed settings are used.
  • EOS R8 Firmware Update, Version 1.4.0
    • Adds the ability to select [WPA2] and [WPA3] as a secured protocol.
    • Adds support for the Software Development Assistance Kit (EDSDK/CCAPI).
    • The following issues have been fixed.
    • Fixes an issue, in which when performing continuous shooting using the electronic shutter with both the [High-Frequency Anti-Flicker Shooting] and [OVF sim. view assist] options set to [On], Err 70 may occur.
  • EOS R10 Firmware Update, Version 1.6.0
    • Adds the ability to select [WPA2] and [WPA3] as a secured protocol.
    • Adds support for the Software Development Assistance Kit (EDSDK/CCAPI).
    • The following issues have been fixed.
    • Fixes an issue, in which when SPEEDLITE EL-5, EL-10 is attached, the “Accessory unavailable status” message may be displayed when restarting after the camera has gone into Auto Power Off. (Only occurs with firmware Ver.1.5.0)
    • Fixes an issue, in which when performing shooting in high-speed continuous shooting + mode with the [Highlight Tone Priority] option set to [ON], focus may not be achieved when certain ISO speed settings are used.
  • EOS R50 Firmware Update, Version 1.3.0
    • Adds the ability to select [WPA2] and [WPA3] as a secured protocol.
    • Adds support for the Software Development Assistance Kit (EDSDK/CCAPI).
    • The following issues have been fixed.
    • Fixes an issue, in which when performing shooting in high-speed continuous shooting + mode with the [Highlight Tone Priority] option set to [ON], focus may not be achieved when certain ISO speed settings are used.