Canon Patent For Various RF Mount Zoom Lenses

Canon Patent

Canon patent application US20190369372 discusses optical formulas for various zoom lenses for the Canon EOS R system.

Among the discussed optics in this Canon patent application is a 28-280mm f/2.8 lens. All lenses seem to be designed for the EOS R full frame mirrorless system.

A zoom lens includes, in order from an object side, a positive first unit, a negative second unit, a positive intermediate group consisting of one or two units and including a third unit located on a most object side, a negative unit, and a rear group consisting of one or two units including a positive unit located on a most object side. Conditional expressions are satisfied with respect to amounts of movement of the second and third units from a wide angle end to a telephoto end, a distance at the wide angle end from a most object side surface vertex in the first unit to a most object side surface vertex in the third unit, an Abbe number of a most object side lens in the first unit, a focal length of the second unit, and focal lengths at the wide angle end and at the telephoto end.


A zoom lens of the disclosure includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, an intermediate lens group having a positive refractive power and including one or two lens units inclusive of a third lens unit located on an object side, a lens unit having a negative refractive power, and a rear lens group including one or two lens units inclusive of a lens unit which is located on the object side and has a positive refractive power, which are arranged in order from the object side to an image side. Here, an interval between every two adjacent lens units is configured to be variable for zooming. In the meantime, a total length of the zoom lens is reduced by keeping the first lens unit unmoved relative to an image plane while varying the intervals between the lens units during the zooming. The first lens unit includes three or more lenses and mainly corrects a spherical aberration and an axial chromatic aberration on a telephoto side. The second lens unit includes three or more lenses and mainly suppresses variations in curvature of field and in chromatic aberration of magnification during the zooming. In order to achieve correction of aberrations and reduction in size at the same time, it is preferable to form each of the first lens unit and the second lens unit by use of three or four lenses. 

canon patent

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

Source: Canon News

A Bit Of Everything (PowerShot Hack, Canon 7, RF 28-70mm F/2L, EOS R vs Nikon Z6, EOS R vs 5D4)

Eos R Vs Nikon Z6

Below, a Canon EOS R vs Nikon Z6 comparison: The MAIN REASON I would choose the Canon EOS R over the Nikon Z 6 in 2019 by Manny Ortiz (EOS R vs Nikon Z6)

Above: This researcher created an algorithm that removes the water from underwater images by Scientific American:

Why do all the pictures you take underwater look blandly blue-green? The answer has to do with how light travels through water. Derya Akkaynak, an oceangoing engineer from the University of Haifa, has figured out a way to recover the colorful brilliance of the deep.

Instant Camera Review: Canon IVY CLIQ+ Instant Camera PrinterThe Phoblographer

This Rare Black Paint Canon 7 Was a Leica M3 Competitor – The Phoblographer

Review: Canon RF 28-70mm F/2L USM (One of the Best Zooms Around) – The Phoblographer:

Although the Canon RF 28-70mm f2 L USM is a massive lens, it’s also understandably so. The photographer who will spring for this lens really needs the extra stop of light and genuinely wants super high-quality images. That’s what you’re going to get with the Canon RF 28-70mm f2 L USM. Couple this with better autofocusing abilities that have come out recently and the exemplary build quality, and you’ve got an excellent lens–on paper.

Review: Canon RF 85mm F1.2L USM – The Phoblographer:

The Canon RF 85mm f1.2 L USM produces truly beautiful bokeh, excellent sharpness, plenty of micro-contrast, and overall exceptional image quality. Its performance is quite snappy as well and it’s capable of focusing and tracking fast-moving subjects quickly and accurately. True to Canon’s heritage, this lens is built like a tank and features some of the best weather sealing we’ve seen

Got an Old Canon Point-and-Shoot Camera? Hack It (Add new features and write scripts with CHDK firmware) – IEEE Spectrum

Practical Use of Field Curvature Graphs – the 50mm Primes – Lens Rentals

National Geographic Declares Three Fujifilm Cameras Best Travel Cameras for 2020 – Fuji Rumors

GIZMON announced this funny(?!?) “Bokeh Lens Illuminator” set – Mirrorless Rumors

Samyang AF 14mm f/2.8 RF Review – ePHOTOzine

Below: Canon EOS R vs. 5D Mark 4 – Which is best for VIDEO? – Parker Walbeck

Below: MacBook Pro 16-Inch: A Photographer’s Review by Tyler Stalman

Deal: Rokinon 8mm f/3.5 HD Fisheye Lens – $169 (limited time offer)

Rokinon 8mm

Amazon has the Rokinon 8mm f/3.5 HD Fisheye Lens with Removable Hood for Canon on sale at $169.

  • Ultra wide-angle 8mm fisheye lens with exaggerated perspective for dramatic effects; Manual focus
  • Ultra-wide 167º diagonal field-of-view for APS-C size image formats will produce a rounded image that doesn’t cover the entire frame when used with compatible full frame digital cameras or 35mm film cameras
  • Lens is constructed with hybrid aspherical elements for outstanding, sharply defined images; Lens has a minimum focusing distance of 12″ (30.48 cm) for enhanced close-up shots
  • Features improved HD optics for the sharper images; Lens features super multi-layer coating to reduce flare and ghost images
  • Aperture Range: F3.5 to F22, Minimum Focusing Distance: 11.8”(0.3m), Filter Size: 67mm
  • Number of Diaphragm Blades: 6; Optical Construction: 10 Glass Elements In 7 Groups

More hand-picked deals are listed here.

Click here to open the rest of the article

Canon EOS R Firmware 1.6 Available For Download (RF 85mm DS support, minor fixes)

Canon Eos R Firmware

Canon released Canon EOS R firmware 1.6.

The firmware update can be downloaded from Canon Germany.

EOS R Firmware Version 1.6.0 incorporates the following enhancements and fixes:

  1. Support for the RF 85mm F1.2L USM DS lens has been added.
  2. Corrects a phenomenon in which the function or setting value assigned to the control ring may change when the control ring is operated in Eco mode.
  3. Corrects a phenomenon in which the camera may stop operating properly during “auto transfer” when using Camera Connect with a Wi-Fi connection.
  4. Corrects a phenomenon in which high-speed synchronization with use of an external flash may not operate properly depending on the camera’s setting for C.Fn2 “Set shutter speed range”.

This update for the Canon EOS R is for cameras equipped with firmware up to Version 1.4.0. If the camera’s firmware is already Version 1.6.0, this update is unnecessary.

This firmware will not deliver significant improvements as the previous one did.

Click here to open the rest of the article

Leading Manufacturer Reaffirm Their Commitment To Photokina 2020

Photokina 2020

Photokina 2020 released a (German) press release where some big players in the industry reaffirm their commitment to the “leading exhibition” in the photography industry.

Canon will be present at photokina 2020. Nikon, Olympus and Leica already released press releases where they explain why they are not present at photokina 2020.

Go Tokura, Chief Executive Officer Image Communication Business Operations at Canon states:

With the imaging industry at a significant turning point, we expect photokina to fulfill its role as the leading exhibition in the global photographic and imaging industries. Canon is pleased to announce new products at photokina, contributing to the industry’s success.

So, Canon “is pleased to announce new products”. Expect the EOS-1D X Mark III and maybe a new EOS M and a new EOS R camera.

The machine translated photokina 2020 press release is after the break.

Click here to open the rest of the article

Here Is Another Proof Of How Significantly Latest Canon EOS R Firmware Improves Eye-AF

Canon Eos R Firmware

If you’re a Canon EOS R shooter most likely you already know about the significant improvements of the latest Canon EOS R firmware. If not, read on.

Chris and Jordan from DPReview test the latest Canon EOS R firmware (v1.4, click here to download) to see how much it improves autofocus. See for yourself.

If you want to learn more about Canon EOS R firmware v1.4 have a look at this comparison with Sony or at this article.

Canon EOS R: Amazon USA, Amazon CA, B&H Photo, Adorama, Digitalrev, KEH Camera, eBay US, Canon USA, Canon CA, BestBuy

Click here to open the rest of the article