Some Canon Power Zoom patents were found for a Canon 15-30mm F4-6.3 PZ, 20-50mm F4-5.6 PZ, and 12-30mm F4-6.3 PZ.
overview
- [Publication number] P2024091148
- [Release date] 2024-07-04
- [Title of Invention] Optical device and imaging device
- [Application date] 2022-12-23
- [Applicant]
[Identification number] 000001007
[Name or company name] Canon Inc. - An optical device capable of appropriately controlling a drive unit for moving a lens group included in an optical system is provided.
- [Background Art]
[0002]
Conventionally, a small and lightweight zoom lens has been proposed which consists of first to fourth lens groups with negative, positive, negative, positive refractive powers arranged in that order from the object side to the image side, and in which the first and fourth lens groups are stationary during zooming and focusing (see Patent Document 1). - An object of the present
invention is to provide an optical device capable of appropriately controlling a drive unit for moving a lens group included in an optical system. - During zooming
, the lens control CPU 106 controls the motor 101 by feedback control using information from the rotation/position sensor 103. At this time, the lens control CPU 106 controls the motor 104 by open loop control in order to correct focus fluctuations that accompany the movement of the second lens group L2.
Example 1 (Admin note: Probably for APS-C)
- Focal length: 14.40-29.10
- F-number: 4.10-6.40
- Half angle of view: 43.4-25.1
- Overall length: 75.06
- Back Focus: 11.78
Example 4 (Admin note: Probably for APS-C)
- Focal length: 12.40-29.10
- F-number: 4.10-6.40
- Half angle of view: 47.9-25.2
- Overall length: 82.67
- Back Focus: 11.71
Example 5 (Admin note: Probably for full size)
- Focal length: 20.60-48.50
- F-number: 4.10-5.88
- Half angle of view: 46.4-24.2
- Overall length: 106.52
- Back Focus: 19.41
overview
- [Publication number] P2024090359
- [Release date] 2024-07-04
- [Name of invention] Zoom lens and imaging device and imaging system having the same
- [Application date] 2022-12-23
- [Applicant]
[Identification number] 000001007
[Name or company name] Canon Inc. - The present invention provides a zoom lens that has an anti-vibration lens group, has excellent optical performance over the entire zoom range, is small and lightweight, and is suitable for video shooting.
- [Background Art]
[0002]
Conventionally, there have been proposed zoom lenses that have an anti-vibration mechanism that performs anti-vibration by moving an anti-vibration lens group in a direction approximately perpendicular to the optical axis, and that enable high-speed zoom operation when changing magnification. Patent Document 1 discloses a zoom lens that is composed of first to fourth lens groups, negative, positive, negative, and positive, arranged in order from the object side to the image side, and performs magnification by moving the lightweight second lens group and third lens group, and causes the fourth lens group to function as an anti-vibration lens group. - [0004] In
a zoom lens equipped with an electric zoom function , if the mass of the driving lens group is large, the load on the actuator for driving the lens group becomes large, making it difficult to perform zooming and focusing quietly and quickly. In addition, the mass of the vibration-proof lens group including the mechanical mechanism tends to be large. Therefore, in order to obtain high optical performance in the entire zoom range while ensuring quietness during zooming and focusing, it is necessary to appropriately set the configuration, refractive power, and arrangement of each lens group and vibration-proof lens group. - [0006] An object
of the present invention is to provide a zoom lens that has an anti-vibration lens group while maintaining good optical performance throughout the entire zoom range, is small and lightweight, and is suitable for video shooting , as well as an imaging device and imaging system that have the same.
Example 1 (Admin note: Probably for APS-C)
- Focal length: 14.40-29.10
- F-number: 4.10-6.35
- Half angle of view: 43.49-25.15
- Overall length: 72.59
- Back focal length: 12.86
Example 4 (Admin note: Probably for APS-C)
- Focal length: 12.33-27.40
- F-number: 4.10-6.40
- Half angle of view: 47.94-26.50
- Total length: 74.60
- Back focal length: 12.86
Example 5 (Admin note: Probably for full size)
- Focal length: 20.60-38.80
- F-number: 4.10-6.18
- Half angle of view: 46.40-29.14
- Overall length: 105.05
- Back Focus: 22.05
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