Canon Patent For 300mm F2.8 IS, 400mm F2.8 IS, and 500mm F4 IS Found

By Louis Ferreira | Published: August 6, 2025


Patents were found for the Canon 300mm f/2.8 IS, Canon 400mm f/2.8 IS, and Canon 500mm f/4 IS lenses.

overview

  • [Publication number] P2025114982
  • [Release date] 2025-08-06
  • [Title of Invention] Optical system and imaging device having the same
  • [Application date] 2024-01-25
  • [Applicant]
    [Identification number] 000001007
    [Name] Canon Inc.
  • To provide an optical system that has high optical performance, a long focal length, and is small and lightweight.
  • BACKGROUND ART
    [0002]
    As an optical system with a long focal length, a so-called telephoto type optical system is known, in which a lens group with positive refractive power is arranged on the object side and a lens group with negative refractive power is arranged on the image side. Telephoto type optical systems are used, for example, in single-focus super telephoto lenses.
  • [0003]
    Generally, when the F-number is constant, the longer the focal length of a lens, the larger the effective diameter of the lens’s light beam. Therefore, particularly in optical systems with long focal lengths, there is a demand for lenses that have a small F-number, are compact and lightweight, and have various aberrations well corrected.
  • In the optical system of Patent Document 1, the diameter of each lens arranged in the first lens group is large because the air gap formed within the first lens group is narrow. Therefore, it cannot be said that the optical system has sufficiently achieved weight reduction .
  • SUMMARY OF THE INVENTION
    It is therefore an object of the present invention to provide an optical system that has high optical performance, a long focal length, and is small and lightweight.
  • [0092]
    Here, the intermediate group M is composed of the second lens group L2 and the third lens group L3, and the second lens group L3 and the third lens group L3 move by different amounts during focusing. By moving two lens groups during focusing, a configuration is achieved that makes it easy to suppress fluctuations in various aberrations that occur during focusing. Furthermore, by constructing the second lens group L2 and the third lens group L3 each using a negative single lens, the weight of the lens groups that move during focusing can be reduced.


Example 1

  • Focal length: 387.98
  • F-number: 2.91
  • Half angle of view: 3.19
  • Image height: 21.64
  • Total length: 372.01
  • Back focus: 38.28


Example 2

  • Focal length: 543.19
  • F-number: 4.12
  • Half angle of view: 2.28
  • Image height: 21.64
  • Total length: 372.05
  • Back focus: 38.30


Example 5

  • Focal length: 289.77
  • F-number: 2.91
  • Half angle of view: 4.27
  • Image height: 21.64
  • Total length: 240.23
  • Back focal length: 37.97

via asobinet

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PowerShot G7X Mark III and PowerShot SX740HS Orders Resume

By Louis Ferreira | Published: August 1, 2025


PowerShot G7X Mark III: B&H Photo / Amazon
PowerShot SX740HS: B&H Photo / Amazon

Orders for the PowerShot G7X Mark III and PowerShot SX740HS were suspended in March, Canon has once again started accepting orders for these cameras.

Notice regarding the resumption of product orders

Release date: August 1, 2025

Thank you for your continued patronage of Canon products.

We will resume accepting orders for the following products, for which we have previously suspended orders, from our retailers and the Canon Online Shop from August 1, 2025. We sincerely apologize to our customers and business partners for any inconvenience or trouble caused during the suspension period. We will continue to strive to further improve our services, and we appreciate your continued patronage.

Note

Product name Order resumption date
PowerShot G7 X Mark III August 1, 2025
PowerShot SX740 HS August 1, 2025

You can scroll

We began accepting orders for the PowerShot G7 X Mark III and PowerShot SX740 HS today, but since we resumed accepting orders, we have received a large number of orders. As a result, it may take longer than usual for your product to be delivered. We apologize for any inconvenience this may cause, and thank you for your understanding.

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via Canon

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Canon Q2 Financial Results – Impact of Tariffs: “We will make up for this by reducing costs and raising prices”

By Louis Ferreira | Published: July 29, 2025


Canon released its Q2 financial results. The Q&A section includes several questions regarding the US-imposed tariffs, and Canon’s position is “we will make up for this by reducing costs and raising prices“:

Here are the details for the Canon Imagina Business Unit:

  • Imaging Business Unit Performance:
    • Second quarter sales increased by 6.5% year-on-year to ¥260.7 billion.
    • Second quarter income before income taxes decreased by 3.9% year-on-year to ¥40.1 billion due to yen appreciation.
    • First half sales totaled ¥472.8 billion, up 12.5% year-on-year.
    • First half income before income taxes reached ¥72.4 billion, up 27.8% year-on-year.
  • Camera Sales:
    • Strong sales of mirrorless cameras, particularly the (launched in the second half of the previous year).
    • New video-centric models, and (launched in Q2), were well-received by both video and still image users for design, operability, and ease of shooting.
    • highly valued by video creators; popular for high-quality shooting among social media and still image users, leading to higher-than-expected orders.
  • Market Outlook and Strategy:
    • Global camera market expected to remain stable at ~6.6 million units, despite anticipated U.S. demand decline due to tariff-related price increases.
    • Sales growth in Q2 driven by and EOS/PowerShot V series.
    • Plan to increase full-year camera sales by 6% to 3 million units, focusing on strong Asian markets.
    • Leverage EOS R5 Mark II’s success to boost RF lens sales.
    • Expand sales and increase production of existing compact camera models to address back orders.
    • Aim for overall camera sales growth of 5.4%.

via: Canon, Photorumors

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First Look AstrHori 6mm f/2.8 Fisheye Full Frame

By Louis Ferreira | Published: July 28, 2025

AstrHori showed a new fisheye Full Frame lens, the AstrHori 6mm f/2.8, at a trade show that I spotted on weibo. The lens doesn’t seem to be electronically connected to the camera, so even though this lens is being shown for E-mount, it is probably coming for other mounts. AstrHori already has an AstrHori 6.5mm F2.0 for APS-C cameras that is very sharp and for every mount, so the claims on weibo that the AstrHori 6mm f/2.8 is super sharp are likely accurate.

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via SonyAddict, weibo

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SmallRig Arca-Type Mount Plate with AirTag Compartment for Select Canon Cameras

By Louis Ferreira | Published: July 27, 2025


SmallRig released a new AirTag holder with a universal mount and a Canon-specific mount that is compatible with EOS R5 Mark II, EOS R5 C, EOS R5, EOS R6, EOS R7, and EOS R10 Cameras. The compact Arca-Type Mount Plate looks quite compact and will help you find and organize your gear. The Specs are below:

Key Features
  • Custom Designed for Select Canon Cameras
  • Arca-Swiss Quick Release Plate Design
  • Built-In Compartment Conceals AirTag
  • Track AirTag up to 49.2′ via Bluetooth
  • Captive 1/4″-20 Camera Mounting Screw
  • Dual 1/4″-20 Female Threads
  • Safety Pin Hole for DJI Gimbals
  • Unobstructed Battery Access
  • EVA Anti-Vibration Cushioning
  • Wrist Strap Loop | Nonslip Rubber Pad

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Canon Rereleases the Canon EOS R1 and EOS R5 Mark II Firmware Updates

By Louis Ferreira | Published: July 26, 2025


Canon republished the Canon EOS R1 and EOS R5 Mark II firmware updates after pulling them on their release day. You can find them below:

Canon EOS R1:B&H Photo / Amazon / Adorama
Canon EOS R1 Firmware changes Download Here

This firmware 1.1.0 includes the following changes:

  • The security function has been improved.
    A password can now be requested when the power is turned on.

    • You will need to set a password the first time.
    • You can change the settings so that the password request screen does not appear.
    • You can check the history of password changes, network information changes, etc.
      *Please refer to the detailed guide “Setting a Password” on cam.start.canon.
  • You can now update the firmware on the camera alone by downloading it from the Internet.
  • A “finder display priority mode” has been added, which turns on the viewfinder when the camera’s rear sensor detects a person.
  • 100/120Hz flicker can now be automatically detected during live view.
  • It is now possible to register the focus position in the preset function of the Camera Remote Application CR-A100. When used with the Robotic Camera System CR-S700R, this makes it easier for the photographer to focus on the intended subject distance and take pictures.
  • Added [Panning Assist] to the menu. When panning with a compatible lens, camera shake correction and subject blur correction are performed during exposure.
  • The servo AF characteristics have been expanded to include [Case Special], which is suitable for shooting subjects through a net, such as badminton and volleyball.
  • Added support for the digital camera software development support kit (EDSDK/CCAPI).A function has been added that allows you to protect an image at the same time as rating it.
  • Supports CFexpress cards up to 8TB.
    • Cards over 8TB require a low level format in the camera.
    • Any card over 8TB will be treated as an 8TB card.
    • Cards over 2TB cannot be used for firmware updates
  • A setting has been added to lower the image capture frame rate to prevent heat generation when connecting the CR-A100 and taking remote shots over long periods of time.
  • When transferring images with voice memos via FTP, the order of transfer has been changed to voice memo → image. Also, if a voice memo is added to an image waiting to be transferred, the image and voice memo will be transferred last.
  • The number of shots recorded during pre-continuous shooting can now be set in single increments.
  • [Airplane Mode] has been added to the shooting button customization.
  • It is now possible to simulate exposure when using a strobe.
  • AF tracking performance has been improved for subjects that are difficult to focus on when shooting video.
  • Fixed an issue that could cause Err70 to occur when enlarging the display after shooting with [Blackout Free Display] set to “On” and [Servo AF 1st Frame Release/One-Shot AF Release] set to “Release Priority.”
  • Fixed an issue where Err70 could occur during Bluetooth communication due to interference from other Bluetooth devices.
  • Fixed the phenomenon that Err70 would very rarely occur when repeatedly shooting in “High-speed continuous shooting +”.
  • Fixed the phenomenon that Err70 would very rarely occur when shooting with the electronic shutter immediately after starting up the camera.
  • Fixed the phenomenon that Err70 occurs very rarely when recording video with the “FHD239.8P/200.0P” setting.
  • Fixed an issue that occasionally caused Err70 to occur when using the camera in movie mode with the frame rate set to “50.00P” and [Movie Digital IS] set to “On” or “Strong.”
  • Fixed an issue that could cause Err70 to occur while waiting to shoot when [Pre-recording] was set to “On” and [Auto Transfer] to image.canon was set to “Yes”.
  • Fixed an issue that could cause the camera to stop working properly if [Review] was set to “Off” and the monitor displayed a low brightness image after taking pre-continuous shots.
  • Fixed an issue that could cause video recording to be impossible when using remote live view shooting in EOS Utility with HDMI output.
  • Fixed an issue where large RAW images could not be transferred via Camera Connect.
  • Fixed the issue of being unable to connect to a Wi-Fi 7 compatible router.

Canon EOS R5 Mark II: B&H Photo / Amazon / Adorama
Canon EOS R5 Mark II Firmware 1.1.0 changes Download Here

This firmware includes the following changes:

  • The security function has been improved.
    A password can now be requested when the power is turned on.

    • You will need to set a password the first time.
    • You can change the settings so that the password request screen does not appear.
    • You can check the history of password changes, network information changes, etc.
      *Please refer to the detailed guide “Setting a Password” on cam.start.canon.
  • You can now update the firmware on the camera alone by downloading it from the Internet.
  • A “finder display priority mode” has been added, which turns on the viewfinder when the camera’s rear sensor detects a person.
  • 100/120Hz flicker can now be automatically detected during live view.
  • It is now possible to register the focus position in the preset function of the Camera Remote Application CR-A100. When used with the Robotic Camera System CR-S700R, this makes it easier for the photographer to focus on the intended subject distance and take pictures.
  • Added [Panning Assist] to the menu. When panning with a compatible lens, camera shake correction and subject blur correction are performed during exposure.
  • The servo AF characteristics have been expanded to include [Case Special], which is suitable for shooting subjects through a net, such as badminton and volleyball.
  • Added support for the digital camera software development support kit (EDSDK/CCAPI).
  • A function has been added that allows you to protect an image at the same time as rating it.
  • Supports CFexpress cards up to 8TB.
    • Cards over 8TB require a low level format in the camera.
    • Any card over 8TB will be treated as an 8TB card.
    • Cards over 2TB cannot be used for firmware updates
  • A setting has been added to lower the image capture frame rate to prevent heat generation when connecting the CR-A100 and taking remote shots over long periods of time.
  • When transferring images with voice memos via FTP, the order of transfer has been changed to voice memo → image. Also, if a voice memo is added to an image waiting to be transferred, the image and voice memo will be transferred last.
  • The number of shots recorded during pre-continuous shooting can now be set in single increments.
  • [Airplane Mode] has been added to the shooting button customization.
  • It is now possible to simulate exposure when using a strobe.
  • AF tracking performance has been improved for subjects that are difficult to focus on when shooting video.
  • Fixed an issue that could cause Err70 to occur when enlarging the display after shooting with [Blackout Free Display] set to “On” and [Servo AF 1st Frame Release/One-Shot AF Release] set to “Release Priority.”
  • Fixed an issue where Err70 could occur during Bluetooth communication due to interference from other Bluetooth devices.
  • Fixed the phenomenon that Err70 would very rarely occur when repeatedly shooting in “High-speed continuous shooting +”.
  • Fixed the phenomenon that Err70 would very rarely occur when shooting with the electronic shutter immediately after starting up the camera.
  • Fixed the phenomenon that Err70 occurs very rarely when recording video with the “FHD239.8P/200.0P” setting.
  • Fixed an issue that occasionally caused Err70 to occur when using the camera in movie mode with the frame rate set to “50.00P” and [Movie Digital IS] set to “On” or “Strong.”
  • Fixed an issue that could cause Err70 to occur while waiting to shoot when [Pre-recording] was set to “On” and [Auto Transfer] to image.canon was set to “Yes”.
  • Fixed an issue that could cause the camera to stop working properly if [Review] was set to “Off” and the monitor displayed a low brightness image after taking pre-continuous shots.
  • Fixed an issue that could cause video recording to be impossible when using remote live view shooting in EOS Utility with HDMI output.
  • Fixed an issue where large RAW images could not be transferred via Camera Connect.
  • Fixed the issue of being unable to connect to a Wi-Fi 7 compatible router.

If your camera’s firmware is version 1.0.1, please perform the firmware update with only one memory card inserted in the camera.

If your camera’s firmware is already version 1.1.0, there is no need to change the firmware. If you wish to change the firmware, please read this page carefully to the end before using the download service.

Posted in Canon EOS R1, Canon EOS R5 Mark II, Firmware | 1 Comment