Canon patents two new RF zoom lenses: a 17-70mm and a 52-83mm f/1.2

Judging from recent patent applications from Canon, we might see two new zoom lenses for the EOS R system: a 17-70mm and a 52-83mm f/1.2 lens. They both include multiple optical formulas, which could mean that we’ll see them in production in the future.

Canon 17-70mm f/3.5-5.6

According to the patent, the 17-70mm lens will come with the aperture range between f/3.5 and f/5.6. There are three optical formulas discussed in the patent for this lens:

• Focal length 17.40 35.02 68.69
• F-number 3.57 4.18 5.85
• Half field angle (degrees) 51.19 31.71 17.48
• Image height 21.64 21.64 21.64
• Total lens length 149.59 133.68 150.50
• BF 13.43 27.63 57.99

 

• Focal length 17.10 34.82 72.70
• F number 3.57 4.18 5.85
• Half angle of view (degree) 51.68 31.85 16.57
• Image height 21.64 21.64 21.64
• Total lens length 151.00 135.57 157.71
• BF 13.13 27.81 63.49

 

• Focal length 18.70 37.55 77.50
• F-number 3.57 4.18 5.85
• Half angle of view (degree) 49.16 29.95 15.60
• Image height 21.64 21.64 21.64
• Total lens length 146.50 128.90 147.50
• BF 15.19 27.72 59.84

Canon 52-83mm f/1.2

Another lens has a pretty weird zoom range of 52-83mm. However, it will probably be marked as 50-80mm (and it’s still pretty unusual). For this lens, there are two optical formulas in the patent:

• Zoom ratio: 1.60
• Focal length: 51.50 – 64.01 – 82.52 mm
• : 1.24
• Half angle: 22.79 – 18.67 – 14.69
• Lens length: 201.66 – 204.48 – 204.68 mm
• Back focus: 22.89 – 23.95 – 25.47 mm

 

• Zoom ratio: 1.60
• Focal length: 51.50 – 64.01 – 82.52 mm
• : 1.13
• Half angle: 22.79 – 18.67 – 14.69
• Lens length: 220.20 – 225.05 – 224.20 mm
• Back focus: 6.51 – 6.53 – 8.64 mm

Since the lenses are still just patents, we don’t know when and if they will go in production. Since the EOS R system is still relatively new, there aren’t too many lenses available for it yet. You can get the “holy trinity” of zoom lenses and a few primes from Canon. All the other lenses are coming from third-party manufacturers such as Lensbaby, Venus Optics, Mitakon or Meike. So, I believe Canon will certainly launch a few more models. Whether those will be the 17-70mm and a 52-83mm, I guess we have to wait and see.

[via Canon Watch (Canon 17-70mm f/3.5-5.6 | Canon 52-83mm f/1.2)]