Canon Patent: RF 300mm f/2.8 IS And RF 400mm f/2.8 IS

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And yet another Canon patent application: two telephoto fast primes for the RF mount.

Canon patent application 2023104022 (Japan, published 7/28/2023) discusses optical formulas for two fast telephoto prime lenses for the RF mount: RF 300mm f/2.8 IS and RF 400mm f/2.8 IS.

From the patent literature:

Optical System and Imaging Device Having the Same

Description of the Related Art

An optical system used in an imaging apparatus is required to be compact and lightweight as a whole, and to have high optical performance capable of satisfactorily correcting various aberrations including chromatic aberration. As a compact optical system, 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. However, in the telephoto type optical system, the longer the focal length, the larger the entire system, and the use of a lens with a large diameter or a heavy lens tends to increase the weight of the entire optical system.

Example 1

  • Focal length: 294.99
  • F-value: 2.90
  • Half angle of view: 4.19
  • Image height: 21.64
  • Overall length: 280.25
  • Back focus: 37.47

Example 2

  • Focal length: 390.00
  • F-value: 2.90
  • Half angle of view: 3.18
  • Image height: 21.64
  • Overall length: 370.50
  • Back focus: 37.00

More Canon patents are listed here.

[via asobinet]

Canon Patent: RF 15mm f/2 And RF 12mm f/2.8 Lenses

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And here is another Canon patent application, for two RF mount lenses.

Canon patent application 023104029 (Japan, 7/28/2023) discusses optical formulas for two fast prime lenses for the RF mount: RF 15mm f/2 and RF 12mm f/2.8.

From the patent literature:

Optical System and Imaging Device Having the Same

A wide-angle lens is provided that is compact and lightweight, and provides a high optical performance in which fluctuations in aberration due to focusing are suppressed while a high photographing magnification can be obtained at the time of photographing at the shortest distance.

Description of the Related Art

In recent years, there has been a demand for wide-angle lenses used in imaging apparatuses that are compact as a whole and that are capable of obtaining a high photographing magnification at the time of photographing at the shortest distance. In addition, there is a demand for a lens having high optical performance in focusing from infinity to the closest object.

In a wide-angle lens, in order to obtain a high photographing magnification at the time of photographing at the shortest distance, it is necessary to increase the amount of movement of the focus lens group, which makes it difficult to reduce the size of the entire lens. In order to reduce the amount of movement of the focus lens group, it is necessary to increase the refractive power of the focus lens group.

[via asobinet]

Canon Takes Over Canadian Chipmaker Redlen For $270M

Eos R With Aps-c
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As you fine and well-informed folks surely know, there is a chip shortage going on. Blame the pandemic, as usual.

Nikkei Asia reports that Canon is about to acquire the Canadian chip maker Redlen. For $270M. It’s not much about cameras but for computer tomography (CT( scanners.

Canon is developing CT scanners that reduce radiation exposure to one-tenth by leveraging Redlen technology that efficiently detects X-rays.

Redlen Technologies, created in 1999, currently employs around 200 workers. It does not disclose its annual sales. Canon has a 15% stake in the Canadian company and appears to have agreed with other shareholders to buy the remaining 85%.

The acquisition is expected to be completed this fall.

Canon would be able to make the needed chips on their own.

Save 10% On Selected Canon (and Nikon) Gear At KEH

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Starting today and expiring July 10th, KEH is offering 10% discount on selected Canon and Nikon gear. Just use code ON7A at checkout.

Click here to see all eligible items (and don’t forget code ON7A when checking out).

Noteworthy Kickstarter projects:

  1. DUO Daypack, quick access camera bag with lifetime warranty
  2. Kamlan 50mm f/1.1 lens for $199
  3. Peak Design super light travel tripod

More selected deals:

More hand-picked deals are listed here.

Authorised Canon retailer B&H Photo has discounted EOS 5D Mark IV and EOS 6D Mark II bundles on offer for the holidays.

We offer 10% discount to subscriptions to Pixpa all-in-one platform for photographers.

Today’s Gold Box and one day only deals at Amazon US, Amazon DE, Amazon UK, B&H Photo, eBay, Adorama.

Canon Europe stores have a cash back promotions going on:

Refurbished lenses and DSLRs at Canon Store (best deals to be found here)

Save $10 on Luminar 4 and/or Aurora HDR 2019 using our code “WATCH” at checkout.

Canon Selected To Outfit Largest Esports Stadium In USA

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Canon U.S.A. Selected By City Of Arlington To Outfit Largest Esports Stadium In United States

Go Canon, you guys rock! Press release:

MELVILLE, NY, January 23, 2019 – Canon U.S.A., Inc., a leader in digital imaging solutions, today announced that its state-of-the-art broadcast lenses will be capturing the action at Esports Stadium Arlington in Arlington, Texas—the country’s largest esports stadium. To outfit the stadium’s 4K UHD broadcast cameras, the City of Arlington purchased three Canon UHD-DIGISUPER 66 4K UHD field box lenses, four CJ24ex7.5B 4K UHD telephoto zoom lenses and one CJ14ex4.3B 4K UHD wide angle zoom lens. 

Located in the heart of Arlington’s Entertainment District, Esports Stadium Arlington is a $10 million, 100,000 square-foot facility built to serve the unique and technologically advanced demands of the esports industry. Designed by award-winning architectural firm Populous and brought to life with build partner Shawmut Design and Construction, the stadium features a competition space with a built-in 85 foot-long, LED wall accompanied by an immersive sound and theatrical lighting system.

Providing 4K optical performance for cameras that feature 2/3-inch sensors, the UHD-DIGISUPER 66 mid-range telephoto zoom lens features a 66x zoom ratio, making it ideal for sports and live-event productions. Leveraging Canon’s Optical Shift Image Stabilizer (Shift-IS), this lens provides both handling and operational controls similar to existing field-zoom lenses for HDTV broadcast cameras, offering stable imaging and comfortable maneuverability during indoor and outdoor sports broadcasting.

“Canon’s ability to supply lenses that met our 4K visual needs, budget constraints, support and time requirements helped us succeed in building this industry-changing facility,” says Corey Dunn, Executive Producer with NGAGE Esports, who oversaw all operations and production for Esports Stadium Arlington. “Working with Canon has been great and has afforded us the maximum flexibility for a facility of this size.”

The City of Arlington also purchased four CJ24ex7.5B 4K UHD telephoto zoom lenses and one CJ14ex4.3B 4K UHD wide angle zoom lens, notable for their compact size and low weight, supporting high-mobility shooting often involved in sports-entertainment production. All the lenses, which are being paired with Grass Valley cameras, will enhance current HDTV optical-imaging performance, while solidifying a place for the shift to 4K production.

“We chose Canon’s broadcast lenses not only for their superb 4K optical quality, but for the Company’s leading service and support offerings,” said Marc Scarpa, founder and executive producer of Simplynew, the systems integrator for the stadium. “This is more than an one-time equipment purchase—it’s the start of a new relationship with Canon as we look to shape the future of esports.”

For more information on Canon’s broadcast solutions, visit www.usa.canon.com/broadcast. For more information about Esports Stadium Arlington, visit http://www.arlington-tx.gov/esports.