CanonNews / Thursday, August 22, 2019 / Categories: Canon Patents Canon Patent Application: Canon RF 17-70mm Canon has applied for a patent that discusses some interesting full-frame lenses. These lenses are from the focal range of 17-70mm that covers an interesting mix between UWA and normal zoom. This isn't the first patent application we've seen with a 17-70, however, both patents have different optical formulas. Multiple patents for the same focal range would certainly lead one to believe that this is something that Canon is seriously considering for the RF mount. Also included is an 18-80mm full frame lens embodiment, which would be equally as compelling on a full frame camera. Interestingly enough, this is a lens that if inexpensive and relatively compact, could be used equally well for full frame or APS-C. It wouldn't be optimized for APS-C, as the image circle described in the patent is most certainly full frame. Howver this would allow Canon to implement an APS-C camera, and have a good normal zoom ready for it, without making an RF-s styled APS-C lens. While they are very consumer-orientated with variable aperture they certainly would be very compelling lenses. 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 Japan Patent Application 2019-139172 Previous Article Canon Patent Application: Further IBIS+IS Patent Applications Next Article Canon Patent Application: AF calibration for DSLRs Print 5398 Tags: CanonCanon RFCanon RF 17-70mm 3.5-5.6 Related articles Macquarie University supported by Canon Australia unveils The Huntsman Telescope ICYMI: Canon RF 100mm F2.8L IS Macro Review TDP Reviews the Canon RF-S 18-150mm F3.5-6.3 IS STM Meyer Optik Görlitz adds native Canon RF to its lens lineup Deal of the Day: Lensbaby 85mm F1.8 for Canon RF and Canon EF Please enable JavaScript to view the comments powered by Disqus.blog comments powered by Disqus