According to the CN, Canon has just filed a new patent which includes one we’ve never seen before – an 18-70mmm powershot lens design.
We will show three examples that this patent application goes into, there are more, but they are simply variations of the same 3 themes;
First we have the “normal” zoom of the powershot G series 1″ cameras; this example covers 24-115mm in equivalent focal length on a 1″ sensor.
- zoom ratio 4.74
- focal length 9.00 22.58 42.68
- F number 2.06 3.09 4.12
- half field angle 35.71 10.47
- image height 6.47 7.65 7.89
- lens total length 60.38 65.31 77.00
- BF 3.00 10.18 8.34
This next example covers a lens design for an APS-C sized sensor, something similar to the G1X Mark III perhaps, with a focal length of 24-70mm equivalent.
- zoom ratio 2.75
- focal length 15.62 28.71 42.97
- F number 2.50 2.88 3.15
- half angle of view (degrees) 35.65 24.78 17.63
- image height 11.20 13.25 13.66
- lens Length 85.01 71.06 73.01
- BF 3.00 19.72 16.57
The final example and possibly the most interesting, is a zoom lens for a 1″ sensor with an 18-70mm equivalent focal length.
- zoom ratios 3.66
- focal length 6.79 12.87 24.88
- F-number 1.85 2.50 2.88
- half angle of view (degrees) 43.60 30.74 17.59
- image height 6.47 7.65 7.89
- lens total length 60.00 54.02 54.00
- BF 3.00 4.04 6.02
Read More Canon Lens Patent
See also 2019 Canon Lens Deals