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

Canon Patent
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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

Sigma Might Soon Release RF Mount Lenses (maybe up to 5 in 2022)

Sigma Canon Eos R Art Prime Rf Mount
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A new RF mount rumor and I won’t hesitate to classify it under “good news”. Sigma will eventually address the RF mount.

Latest rumor has it Sigma might dedicate its resources to the design and production of RF mount lenses. Maybe already in 2022. Sigma in then past said that there is not enough demand for RF mount lenses for them to invest into it. In June 2021, Mr. Kazuto Yamaki (Sigma CEO) said that the RF mount is internally discussed and researched. To most of us this sounded like “we are getting into it”. So it doesn’t wonder that much that now Sigma is rumored to release RF mount lenses soon. However, be aware that “Sigma is going to release RF lenses soon”-rumors go back to 2019 (see here too). This time it might be reliable, though.

The source suggests that Sigma might release up to five RF mount lenses in 2022. I can only hope it will happen. Sigma lenses are exceptional performers for the money, I myself love the Sigma 18-35mm f/1.8 and wouldn’t want to miss it. But there are so many more awesome Sigma lenses for Canon cameras.

Stay tuned.

Source: Canon Rumors

New Unreleased Canon Lenses Show Up For Certification (but what are they?)

Canon Lenses
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Two new and yet unreleased Canon lenses have been spotted at a certification authority. We wonder what lenses are coming.

Spotted by Nokishita, the two lenses with SKUs 4858C005 and 5564C005 (image on top) are mentioned along with the recently released RF 5.2mm f/2.8L Dual Fisheye lens. We think these are two more RF mount lenses but are not sure what lenses. One might be an entry level lens. For all we know the two lenses might well be the RF 18-45mm f / 4-5.6 IS STM and “RF 24mm f/1.8 IS STM Macro, both should be relatively affordable lenses.

An overview about rumored upcoming lenses can be seen here.

Stay tuned.

Canon RF 100-400mm f/5.6-8 IS Review And Sample Photos

RF 100-400mm F/5.6-8 IS Review
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Here is a new Canon RF 100-400mm f/5.6-8 IS review. Interesting land affordable lens the Canon RF 100-400mm f/5.6-8 IS.

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

Photography Blog posted their exhaustive Canon RF 100-400mm f/5.6-8 IS review. There is also a set of sample pictures. From their conclusion:

The new RF 100-400mm F5.6-8 IS USM is the best super-telephoto lens for most Canon full-frame mirrorless shooters, delivering satisfyingly sharp results and being compact and lightweight enough to carry around all day, and it’s also something of a bargain to boot.

The main rival to this lens is the RF 100-500mm F4.5-7.1L IS USM, which at an eye-watering £2899.99 / $2699.99 will be well out of the price range of most people.

For everyone except professional users who will use the 100-500mm day in, day out, at just £699 / $649 the new RF 100-400mm makes a lot more sense from a financial point of view.

Thankfully its not just the price tag that’s appealing – it also delivers the goods in most other departments, from image quality to focusing speed, from build quality to feature-set.

More Canon RF 100-400mm f/5.6-8 IS review stuff is listed here.

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, Canon IT, WEX Photographic, Canon FR, Canon UK, Canon DE

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Canon RF 16mm f/2.8 STM Review (highly recommended)

Rf 16mm F/2.8 STM Review
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Here is a new Canon RF 16mm f/2.8 STM review. The RF 16mm is an interesting and affordable lens for the EOS R system.

At a glance:

  • RF-Mount Lens/Full-Frame Format
  • Aperture Range: f/2.8 to f/22
  • One Aspherical Element
  • Super Spectra Coating
  • STM Stepping AF Motor
  • Customizable Control Ring
  • Rounded 7-Blade Diaphragm

Photography Blog posted their Canon RF 16mm f/2.8 STM review. They gave a 4.5/5 and “Highly Recommended” rating. From their conclusion:

[…] the Canon RF 16mm F2.8 STM is a very cheap and very cheerful ultra-wide-angle prime lens that delivers sharp images in the centre, fast and reliable auto-focusing, usefully close shooting distance, and surprisingly good build quality, all housed inside a tiny, super-lightweight design.

It delivers excellent sharpness at the centre of the frame throughout most of its aperture range, even performing very well when shooting wide-open at f/2.8. It’s a different story at the edges of the image, though, which are much softer, with best results obtained from f/5.6-11.

Preorder links for the Canon RF 16mm f/2.8 STM:

America: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA
Europe & UK: Amazon DE, Amazon UK, Amazon IT, Canon IT, WEX Photographic, Canon FR, Canon UK, Canon DE

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Canon RF 100mm f/2.8L Macro IS Review (highly recommended)

RF 100mm F/2.8L Macro IS Review
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Here is a Canon RF 100mm f/2.8L Macro IS review. The RF 100mm Macro is one of the recently released lenses for the EOS R system.

At a glance:

  • RF-Mount Lens/Full-Frame Format
  • 1.4x Magnification with Autofocus
  • Aperture Range: f/2.8 to f/32
  • Minimum Focusing Distance: 10.2″
  • Super Spectra Coating
  • Smooth and Quiet Auto Focus
  • Optical Image Stabilization; Hybrid IS
  • Control Ring for Direct Setting Changes
  • 9-Blade Diaphragm
  • Weather-Sealed Construction

Photography Blog posted their exhaustive Canon RF 100mm f/2.8L Macro IS review. They seem to be rather fond of the lens. They gave the lens a “highly recommended” and a 4.5/5 rating. From their conclusion:

The Canon RF 100mm F2.8L Macro IS USM is a superb macro lens boasting class-leading magnification, outstanding sharpness, impeccable build quality and a unique Spherical Aberration Control ring.

It delivers outstanding sharpness at both the centre and edges of the frame throughout most of its aperture range, even performing brilliantly when shooting wide-open at f/2.8.

There’s some vignetting which requires you to stop down by at least 2 f-stops to prevent it completely, but there’s little evidence of chromatic aberrations. Distortion is very well controlled even when shooting in the RAW format when the camera body doesn’t apply any automatic corrections.

More coverage of this very interesting lens is listed here.

Preorders in USA are open at $1,399: B&H Photo | Adorama. If you are based in UK we recommend Park Cameras. More worldwide preorders:

America: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA
Europe & UK: Amazon DE, Amazon UK, Amazon IT, Canon IT, WEX Photographic, Canon FR, Canon UK, Canon DE

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