Only for today (10/14/2024) B&H Photo has an excellent deal on the Tokina atx-i 11-16mm f/2.8 CF Lens for Canon EF mounts (you can use it on your RF mount camera with the adapter.

At a glance:

• EF-Mount Lens/APS-C Format
• 17.6-25.6mm (35mm Equivalent)
• Aperture Range: f/2.8 to f/22
• Two Aspherical Elements
• Two SD Low Dispersion Elements
• Multi-Coated Elements
• One-Touch Focus Clutch Mechanism
• Internal Focusing Design
• 9-Blade Diaphragm

Get the Tokina atx-i 11-16mm f/2.8 CF for EF mounts on sale at $279. Compare at $499.

More selected deals:

• Get Excire Foto (AI powered photo managment) with 15% discount by using code “canonwatch” at checkout
• USA: Canon USA | B&H Photo | Adorama | Amazon US
• Germany: Amazon Germany
• Refurbished lenses and DSLRs at Canon Store (best deals might be found here)

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]

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.

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:

• Get Excire Foto (AI powered photo managment) with 15% discount by using code “canonwatch” at checkout
• USA: Canon USA | B&H Photo | Adorama | Amazon US
• Germany: Amazon Germany
• Refurbished lenses and DSLRs at Canon Store (best deals might be found here)

These are all high resolution mirrorless cameras, and among the top models of the respective manufacturers. How do the Canon EOS R5 Mark II and Nikon Z8 and Sony a7R V compare to each other? Find out in the video below, courtesy of the folks at PetaPixel.

More gear reviews are listed here.

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]