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Canon News has uncovered a patent showing optical formulas for fast RF zoom lenses, likely of the L variety. The purpose of the patent is to showcase a high-performance zoom lens design.
Of the three embodiments in this patent, only the RF 35-135mm f/2.8 seems like a design that has a slight chance of becoming a consumer product.
Canon RF 35-135mm f/2.8 | |||
Focal Length | 35.39mm | 69.00mm | 132.93mm |
F Number | 2.85 | 2.85 | 2.85 |
Half Angle of View | 31.44° | 17.41° | 9.24° |
Image Height | 21.64mm | 21.64mm | 21.64mm |
Total Lens Length | 173.35mm | 186.83mm | 203.35mm |
Backfocus | 17.95mm | 27.32mm | 34.01mm |
Canon RF 40-150mm f/2.8 | |||
Focal Length | 40.06mm | 69.00mm | 147.97mm |
F Number | 2.85 | 2.85 | 2.85 |
Half Angle of View | 28.37° | 17.41° | 8.32° |
Image Height | 21.64mm | 21.64mm | 21.64mm |
Total Lens Length | 173.35mm | 191.43mm | 218.30mm |
Backfocus | 17.98mm | 26.04mm | 38.94mm |
Canon RF 30-110mm f/2.8 | |||
Focal Length | 30.99mm | 69.00mm | 109.92mm |
F Number | 2.85 | 2.85 | 2.85 |
Half Angle of View | 34.92° | 17.41° | 11.13° |
Image Height | 21.64mm | 21.64mm | 21.64mm |
Total Lens Length | 173.09mm | 189.92mm | 203.35mm |
Backfocus | 17.95mm | 28.25mm | 33.97mm |
- Via: Canon News
- Source: JPO