Canon Patent: 28-70mm f/2.8 And 28-60mm f/4 Lenses For RF Mount

Canon Patent

And yet another Canon patent application for lenses for the RF mount (EOS R).

Canon patent application 2021-179550A (Japan, spotted by Hi Lows Note) discusses optical formulas for a 28-70mm f/2.8 and a 28-60mm f/4 lens, both for full frame mirrorless cameras (hence for the RF mount on the EOS R).

Embodiment 1

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 39.89 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.65 28.06 17.67
  • Image height (mm): 21.64 21.64 21.64
  • Lens length (mm): 149.46 133.18 115.94
  • Back focus (mm): 13.48 19.38 27.78

Embodiment 2

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 39.96 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.68 27.27 17.67
  • Image height (mm): 18.50 20.60 21.64
  • Lens length (mm): 152.91 136.27 115.98
  • Back focus (mm): 13.50 19.41 26.94


Embodiment 3

  • Zoom ratio: 2.08
  • Focal length (mm): 28.84 33.20 60.00
  • F number: 4.12 4.12 4.12
  • Half angle of view (degree): 32.68 31.82 19.83
  • Image height (mm): 18.50 20.60 21.64
  • Lens length (mm): 141.33 130.27 104.61
  • Back focus (mm): 19.70 21.65 35.51

Embodiment 4

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 37.16 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.68 29.00 17.67
  • Image height (mm): 18.50 20.60 21.64
  • Lens length (mm): 121.04 110.42 101.92
  • Back focus (mm): 9.97 13.25 25.53

Embodiment 5

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 39.87 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.65 28.07 17.67
  • Image height (mm): 21.64 21.64 21.64
  • Lens length (mm): 146.19 132.32 116.42
  • Back focus (mm): 14.84 20.01 28.77

Canon RF 100-400mm f/5.6-8 IS Review (and some samples)

RF 100-400mm F/5.6-8 IS Review

Wanna bet this lens is going to be hugely popular among EOS R shooters? Here is a Canon RF 100-400mm f/5.6-8 IS review, one of the less expensive options for the RF mount.

At a glance:

  • RF-Mount Lens/Full-Frame Format
  • Aperture Range: f/5.6 to f/45
  • One UD Element, One Aspherical Element
  • Super Spectra Coating
  • Nano USM AF Motor
  • Maximum Magnification: 0.41x at 400mm
  • Optical Image Stabilizer
  • Customizable Control Ring
  • Rounded 9-Blade Diaphragm

Christopher Frost posted his Canon RF 100-400mm f/5.6-8 IS review. Her calls it a “soon-to-be-very-popular-indeed very low budget Canon RF mount lens“. We agree.

Canon RF 100–400mm F5.6–8 IS:

America: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA
Europe & UK: Amazon DE, Amazon UK, Amazon IT, Wex Photo Video, Canon DE, Canon UK

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Today Only: Rokinon AF 85mm f/1.4 Auto Focus Lens for Canon RF – $589 (reg. $699)

Rokinon AF 85mm

Only for today (10/14/2021) Adorama has a 16% discount on the Rokinon AF 85mm f/1.4 Auto Focus Lens for Canon RF mount.

At a glance:

  • RF-Mount Lens/Full-Frame Format
  • Aperture Range: f/1.4 to f/16
  • One Extra-Low Dispersion Element
  • Four High Refractive Index Elements
  • Ultra Multi-Coating
  • Ultrasonic Dual Linear AF Motor
  • Weather-Sealed Construction
  • Round 9-Blade Diaphragm

Get the Rokinon AF 85mm f/1.4 Auto Focus Lens for Canon RF on sale at $589. Compare at $699. Rokinon lenses are also branded as Samyang, depending by your geographic location.


Hand-picked deals are listed here.

Deal pages:

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

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

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A Pro Photographer Changed Her Mind About The Canon RF 28-70mm f/2L

Canon RF 28-70mm F/2L Review Rf Mount Canon Eos R

Sometimes you are mistaken, and if you can admit it, it’s a good sign. That’s what happened to a professional photographer with the Canon RF 28-70mm f/2L.

At a glance:

  • RF-Mount Lens/Full-Frame Format
  • Aperture Range: f/2 to f/22
  • Ultra-Low Dispersion Elements
  • Ring-Type Ultrasonic Motor AF System
  • Customizable Control Ring
  • Rounded 9-Blade Diaphragm

Katelyn James posted a video where she shares her experiences with the Canon RF 28-70mm f/2L lens:

A few months ago I made a review of the Canon RF 28-70 f/2.0 after using it for only one wedding day. Well 6 months later my opinion about this lens has changed… I LOVE IT more than I ever thought I would. It gives you all the advantages of shooting with prime lenses AND zoom lenses with almost zero compromise. I use it for 80%-90% of my images on the wedding day and want to share my experiences with this lens after using it non-stop for 6 months!

More coverage of the outstanding Canon RF 28-70mm F/2L is listed here.

Canon RF 28-70mm F/2L: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA

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The Rumored RF 5.2mm Lens Seems To Be A Dual Fisheye VR Lens

A few days ago we got a rumor suggesting Canon might be set to release a RF 5.2mm f/2.8 lens. Today we know a bit more.

As Nokishita added to their original rumor, the RF 5.2mm f/2.8 lens might indeed be a dual fisheye lens for VR (virtual reality) applications:

The product category of canon’s RF 5.2mm f/2.8 L Dual Fisheye seems to be a VR lens.

There is more. Months ago a Canon patent application was spotted that seems to be related to the rumored RF 5.2mm lens. The patent application P2021-51282A (Japan) discusses optical formulas for a stereo lens for a full frame mirrorless camera. From the patent literature:

PROBLEM TO BE SOLVED: To provide a small lens device that can obtain a natural stereoscopic effect by setting an appropriate length of a base line.

SOLUTION: A lens device (200) includes: a first optical system (201R); a second optical system (201L) arranged in parallel to the first optical system; and a lens mount unit (202) attachable to a camera body, the first and second optical systems each having a first optical axis (OA1), a second optical axis (OA2), and a third optical axis (OA3) in order from an object side to an image side. A distance (L1) between the first and second optical systems is larger than a dimeter (φD) of the lens mount unit, and a distance (L2) between the third axes of the first and second optical systems is smaller than the dimeter (φD) of the lens mount unit.

A RF 5.2mm f/2.8 lens for the EOS R full frame mirrorless system. Interesting times ahead.

Is Canon Set To Release a RF 5.2mm f/2.8 Lens?

Rf 24mm F/1.8 Rf-s Canon Eos R7 Eos R100 Canon High Resolution Eos R R10 Eos C5 Eos R1 Eos R5c Canon Rf 16mm Rf 35mm F/1.2L EF Lenses Tilt-shift Lenses Rumor

Not sure if this is a typo or if it is real. Canon might release a RF 5.2mm f/2.8 lens for the EOS R system, a usually very reliable rumor source suggests.

Nokishita tweeted that Canon might be set to release a RF 5.2mm f/2.8 lens. A fish-eye lens, I guess. Nokishita says:

Canon’s next RF lens will be 5.2mm f/2.8L. Check Canon’s latest accessory list for unreleased lens caps 5.2.

As far as I know, such a lens has never been rumored. What do you think? Real, or something got lost in translation?