Canon Patent: 12-24mm f/2.8 And 14-20mm f/2 For RF-Mount

Canon Patent

Here is a new Canon patent application, as usual for RF-mount lenses.

Canon patent application 2024042622 (japan, published 3/28/2024) discusses optical formulas for two lenses for full frame mirrorless cameras (i.e. fort he RF-mount):

  • 12-24mm f/2.8
  • 14-20mm f/2

From the patent literature:

  • An object of the present invention is to provide an ultra-wide-angle zoom lens that is compact and provides high optical performance over the entire object distance range.
  • [ Background Art] As an imaging optical system, an imaging lens with a half angle of view of more than 50 degrees at the wide-angle end is called an ultra-wide-angle lens, and among them, a bright lens with an F value of 2.8 or less has a wide Suitable for taking advantage of the angle of view and short shutter speed for shooting starry skies and dark places. Such an ultra-wide-angle lens is required to have high resolution performance that suppresses spherical aberration and sagittal flare over a short distance from an infinite subject. Particularly in zoom lenses, there has been a problem in that it is difficult to reduce the size of the lens while suppressing variations in aberrations from the wide-angle end to the telephoto end.
  • However, the zoom lens disclosed in Patent Document 1 has a large F value and cannot sufficiently reduce aberration fluctuations during zooming due to an increase in aperture. The zoom lens of Patent Document 2 reduces aberration fluctuations during zooming by having multiple groups compared to the zoom lens of Patent Document 1, but there is a need for a wider angle and a smaller size.
  • An object of the present invention is to provide an ultra-wide-angle zoom lens that is compact and provides high optical performance over the entire object distance.

Example 1

  • Focal length: 12.29-23.80
  • F value: 2.93
  • Half angle of view: 60.39-42.27
  • Image height: 21.64
  • Total length: 138.05-134.83
  • Back focus: 13.86-19.48

Example 2

  • Focal length: 14.30-21.50
  • F value: 2.06
  • Half angle of view: 56.54-45.18
  • Image height: 21.64
  • Total length: 148.04-139.46
  • Back focus: 13.87-20.30

More Canon patents are listed here.

[via asobinet]

Deal: Tokina AT-X 14-20mm f/2 PRO DX – $319 (reg. $499, today only)

Tokina AT-X 14-20mm

Only for today (6/14/21) B&H Photo has a 36% discount on the Tokina AT-X 14-20mm f/2 PRO DX lens for Canon EF mount.

At a glance:

  • Canon EF Mount Lens/APS-C Format
  • 22.4-32mm (35mm Equivalent)
  • Aperture Range: f/2 to f/22
  • One Plastic-Molded Aspherical Element
  • Two Glass-Molded Aspherical SD Elements
  • Two Super Low Dispersion Elements
  • Multi-Layer Anti-Reflection Coating
  • Internal Focus; One-Touch Focus Clutch
  • Nine-Blade Diaphragm

Get the Tokina AT-X 14-20mm f/2 PRO DX on sale at $319. Compare at $499.


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.

Click here to open the rest of the article

Deal: Tokina AT-X 14-20mm f/2 PRO DX Lens – $299 (reg. $499, today only)

Tokina AT-X 14-20mm

Today only (02/08/21) B&H Photo DealZone has a 40% discount on the Tokina AT-X 14-20mm f/2 PRO DX Lens.

At a glance:

  • Canon EF Mount Lens/APS-C Format
  • 22.4-32mm (35mm Equivalent)
  • Aperture Range: f/2 to f/22
  • One Plastic-Molded Aspherical Element
  • Two Glass-Molded Aspherical SD Elements
  • Two Super Low Dispersion Elements
  • Multi-Layer Anti-Reflection Coating
  • Internal Focus; One-Touch Focus Clutch
  • Nine-Blade Diaphragm

Get the Tokina AT-X 14-20mm f/2 PRO DX Lens on sale at $299. Compare at $499.


Hand-picked deals are listed here.

Deal pages:

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

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

Click here to open the rest of the article

Tokina AT-X 14-20mm f/2 PRO DX (Canon mount) deal – $599 (reg. $799, B&H)

Tokina AT-X 14-20mm f/2
Tokina AT-X 14-20mm f/2

Tokina AT-X 14-20mm f/2 PRO DX at a glance:

  • Canon EF Mount Lens/APS-C Format
  • 22.4-32mm (35mm Equivalent)
  • Aperture Range: f/2 to f/22
  • One Plastic-Molded Aspherical Element
  • Two Glass-Molded Aspherical SD Elements
  • Two Super Low Dispersion Elements
  • Multi-Layer Anti-Reflection Coating
  • Internal Focus; One-Touch Focus Clutch
  • Nine-Blade Diaphragm

B&H Photo has the Tokina AT-X 14-20mm f/2 PRO DX lens (Canon mount) on sale at $599. Compare at $799; it’s a $200 instant discount.

Today’s Gold Box and one day only deals at Amazon USAmazon DEAmazon UKB&H Photo, eBay and Adorama

Tokina 14-20mm f/2.0 AT-X Pro DX lens available for pre-order at $899

Tokina 14-20mm F/2.0 AT-X Pro DX

Adorama has the new Tokina 14-20mm f/2.0 AT-X Pro DX lens in stock and ready to ship for $899.

Tokina 14-20mm f/2.0 AT-X Pro DX overview:

  • Fast F2.0 Zoom lens
  • Includes aspherical lens element
  • Compact Lens
  • One-touch Focus Clutch Mechanism allows the photographer to switch between AF/MF simply by sliding the focus ring, forward side for AF and back toward the camera for MF.
  • Focal Length14 – 20 mm
  • ApertureMaximum: f/2, Minimum: f/22
  • Format Compatibility: APS-C
  • Angle of View: 91.68 deg. – 71.78 deg
  • Minimum Focus Distance: 11.02″ (28 cm)
  • Maximum Reproduction Ratio: 1:8.36
  • Groups/Elements: 11/13
  • Diaphragm Blades: 9
  • Autofocus: Yes
  • Filter Thread: 82 mm
  • Dimensions (Diameter x Length): 3.5 x 4.17″ / 89mm x 106mm
  • Weight: 25.55 oz / 725g

Tokina unveils AT-X 14-20 F2 PRO DX lens for APS-C DSLRs

AT-X 14-20 F2 PRO DX

Tokina announced the Tokina AT-X 14-20 F2 PRO DX lens. For an overview (machine translated) I suggest you head over to DicaHub. Canon mount version will be available in February 2016, price in US and EU not yet disclosed, likely below $900

Tokina AT-X 14-20 F2 PRO DX

AT-X 14-20 F2 PRO DX

More information: