Canon Patent: 15-70mm F2.8-4 IS, 15-70mm F4 IS And 15-85mm F2.8-5.6 IS for APS-C

Canon Patent

A new Canon patent application for three lenses for the RF mount and cameras with APS-C imaging sensor.

Canon patent application 2022013994 (Japan, published 8/14/2023) discusses optical formulas for three RF-mount lenses for APS-C imaging sensors:

  • 15-70mm F2.8-4 IS
  • 15-70mm F4 IS
  • 15-85mm F2.8-5.6 IS

From the patent literature:

A compact zoom lens with a wide angle of view is provided that is robust against manufacturing errors and yet provides high optical performance.

Description of the Related Art

In recent years, there has been a strong demand for a lens system used in an imaging apparatus to have high optical performance while the entire lens system is compact. In order to achieve good optical performance while miniaturizing the entire lens system, it is important to appropriately set the refractive power and configuration of each lens group, and the conditions for moving each lens group during zooming. In particular, when miniaturizing the lens system of a camera with a large image sensor, high refractive index glass materials are often used, and it is required to suppress chromatic aberration while ensuring robustness against decentration of the lens.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a compact zoom lens or the like with a wide angle of view that provides high optical performance while being robust against manufacturing errors. In the zoom lens of each embodiment, any one of the lens groups as a whole or a part thereof is moved so as to include a component in the direction perpendicular to the optical axis as an anti-vibration group, or in an in-plane direction including the optical axis. It is also possible to employ a configuration in which vibration isolation is performed by rotationally moving (oscillating). In particular, it is preferable to use the cemented lens B as the anti-vibration group.

Example 1 (15-70mm F4, for APS-C)

  • Zoom ratio 4.40
  • Focal length 15.45 36.03 67.94
  • F value 4.12 4.12 4.12
  • Half angle of view 41.27 19.59 10.60 Image
  • height 12.66 13.66 13.66
  • Total lens length 100.14 108.00 120.23
  • Back focus 10.46 10.79 12.37

Example 2 (15-70mm F2.8-4, for APS-C)

  • Zoom ratio 4.40
  • Focal length 15.45 36.49 68.04
  • F number 2.88 3.86 4.12
  • Half angle of view 41.38 19.53 10.61 Image
  • height 12.66 13.66 13.66
  • Lens length 100.32 11 0.44 118.71
  • Back focus 10.62 11.68 15.59

Example 3 (15-85mm F2.8-5.6, for APS-C)

  • Zoom ratio 5.42
  • Focal length 15.45 36.29 83.77
  • F value 2.88 4.00 5.80
  • Half angle of view 41.36 19.65 8.71
  • Image height 12.66 13.66 13.66
  • Total lens length 101.54 1 16.35 133.85
  • Back focus 12.12 12.61 16.91

More Canon patents are listed here.

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Canon Might Soon Announce The Canon EOS R100

Eos R6 Mark Iii Nab 2023 Canon Eos R5 Mark Ii Canon Eos R8 CP+ 2024 Mark Ii Canon EOS Rf 24-50mm R6 Mark Ii Rf Mount Eos R6 Mark Ii Rf 300mm Rf 35mm Canon Eos R100 Rf 24mm F/1.8 Rf-s Canon Eos R7 Eos R100 Canon High Resolution Eos R R10 Eos C5 Canon Canon Eos R1 Eos R5c Canon Rf 16mm Rf 35mm F/1.2L EF Lenses Tilt-shift Lenses Rumor

We broke the news about a possible Canon EOS R100 time ago. Now it appears the camera might get announced soon.

It seems 5chan has become the new source for rumors. Everyone takes from there, but the usual suspects do not quote it. Believe me, 90% of the rumors come from there.

Like this one. The Canon EOS R100 is actively discusses, with some leaks we think might be real. Have a look about what is rumored (at least the name “EOS R100” seems to be sure):

  • RF 28mm F2.8 STM lens – $299
  • Lens Hood EW-55: $45
  • EOS R100 Body – $479
  • EOS R100 RF-S18-45 IS STM Lens Kit – $599
  • EOS R100 Double Zoom Kit (18-45mm & 55-210mm) – $829

The Canon EOS R100 might be the first RF-mount camera that will actively take the place of the EOS M lineup. We’ll see.

[via asobinet]

Canon EOS R50 Hands-on Review (is it replacing the EOS M50?)

Canon Eos R50 Review

A Canon EOS R50 hands-on review. The Canon EOS R50 made quite the splash when it was announced.

At a glance:

  • 24.2MP APS-C CMOS Sensor
  • DIGIC X Image Processor
  • UHD 4K 30p Video Recording
  • Dual Pixel CMOS AF II with 651 Zones
  • 2.36m-Dot Electronic Viewfinder
  • 3.0″ 1.62m-Dot Vari-Angle Touchscreen
  • 15 fps Electronic Shutter
  • Movie for Close-Up Demos Mode
  • Vertical Movie Mode
  • Multi-Function Shoe, Wi-Fi & Bluetooth

DPReview posted their Canon EOS R50 hands-on review. They also tackle the question many are wondering about: can or does the EOS R50 replace the hugely popular Canon EOS M50 Mark II? DPReview says:

The similarities between the two cameras [EOS R50 and EOS M50 II, editor’s note] are plentiful. […] In short, they seem to be targeting the same user base of casual users, beginners and those seeking a small, simple camera.

So what does the R50 mean for the M-mount?

Canon hasn’t said anything official on what the future holds for the M-mount, but it’s been four and a half years since the last EF-M lens launch and two and a half years since the last new EOS M body. The M50 was one of Canon’s best-selling EF-M mount models and yet we haven’t seen any movement or new support to expand on the EF-M mount in years. Now, in addition to having no new news, we’ve gotten what looks like a direct upgrade/replacement of the M50 II, new and improved in every way.

Read the Canon EOS R50 hands-on review at DPReview…

DPReview provided also a Canon EOS R50 sample gallery to check out.

The Canon EOS R50 was announced last week, along with the Canon EOS R8 and new RF mount lenses.

All new Canon gear is available for preorder at B&H Photo and Adorama, or by using the links below.

Canon EOS R50 preorder:

America: B&H Photo, 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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Today Only: Sigma 18-35mm f/1.8 DC HSM Art Lens (Canon EF) – $549 (reg. $799)

Sigma 18-35mm F/1.8 Deal Art DC ART

Only for today (12/16/2022) B&H Photo has a solid $250 discount on the excellent Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon EF mounts.

At a glance:

  • EF-Mount Lens/APS-C Format
  • 28.8-56mm (35mm Equivalent)
  • Aperture Range: f/1.8 to f/16
  • Five SLD Elements
  • Four Aspherical Elements
  • Super Multi-Layer Coating
  • Hyper Sonic Motor AF System
  • Rounded 9-Blade Diaphragm

Get the Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon EF mounts on sale at $549. Compare at $799. I own this lens and I love it.

More selected deals:

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Has The Canon EOS M50 Mark II Also Been Discontinued?

Eos R6 Mark Iii Nab 2023 Canon Eos R5 Mark Ii Canon Eos R8 CP+ 2024 Mark Ii Canon EOS Rf 24-50mm R6 Mark Ii Rf Mount Eos R6 Mark Ii Rf 300mm Rf 35mm Canon Eos R100 Rf 24mm F/1.8 Rf-s Canon Eos R7 Eos R100 Canon High Resolution Eos R R10 Eos C5 Canon Canon Eos R1 Eos R5c Canon Rf 16mm Rf 35mm F/1.2L EF Lenses Tilt-shift Lenses Rumor

After reports about the discontinuation of the Canon EOS M200, now it is suggested the Canon EOS M50 Mark II is facing the same fate.

The Canon EOS M50 Mark II is one of Canon’s bestselling consumer MILCs. The fact that it might be discontinued finds us surprised. On the other hand, we expect Canon to release a very entry level EOS R mirrorless camera with APS-C sensor, the Canon EOS R100. Maybe Canon is really discontinuing the EOS M lineup.

Stay tuned…

[via asobinet]

Laowa Argus 25mm F0.95 APO Review (a serious lens, D. Abbott)

Laowa Argus 25mm

Just announced, the Laowa Argus 25mm F0.95 APO lens for APS-C sensors already has a full review.

At a glance:

  • Aperture Range: f/0.95 to f/11
  • 50mm (35mm Equivalent)
  • Internal Focus Design
  • 1 Aspherical Element, 1 ED Element
  • 3 Ultra-High Refraction Elements
  • 9 Aperture Blades
  • 62mm Filter Thread
  • Manual Focus

Dustin Abbott posted his exhaustive Laowa Argus 25mm F0.95 APO review. From his conclusion:

The Laowa Argus 25mm F0.95 APO is both similar and different than the Argus 35mm F0.95 full frame lens that I reviewed. The APO design does alter the formula, which results in more usable sharpness results at huge aperture values like F0.95.

It also means that the bokeh isn’t quite as soft, however, which might turn off some of the core audience that is interested in a lens like this.

These are all a matter of preference, however, and what is definite is that there is always room for more premium prime lenses for APS-C, a space that often gets overlooked.  This is a serious lens, and it is interesting to see Laowa bring some of their APO experience that they’ve developed in their macro lens designs into a more extreme lens like this.  You’ll have to determine for yourself whether or not the end result is something you’re looking for, but I will say this:  the list of F0.95 lenses with an Apochromatic design and a price tag of under $550 USD is a VERY short one.  

Read the full review at Dustin Abbott’s…

All reviews by Dustin Abbott come with test charts, sample pics, dynamic range tests, and much more. D. Abbott also provides a video-review that someone might prefer to the written review. It’s here (below) for your viewing pleasure.

Laowa Argus 25mm F0.95 APO: Venus Optics | Adorama | B&H Photo

More reviews by Dustin Abbott are listed here.

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