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Imaging Systems, Mounting Adapters, Imaging Devices

An imaging device and imaging system technology, applied in the field of imaging systems, can solve the problems of mirrorless digital single-lens cameras shortening the flange focal length, interchangeable lenses cannot be used as they are, and achieve the effect of improving focusing accuracy

Active Publication Date: 2017-05-24
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the sub-mirror that guides the incident light to the focus detection part is removed together with the mirror, mirrorless digital single-lens cameras cannot perform focus detection in the phase difference detection method using the camera main body
[0004] In addition, since mirrorless digital single-lens cameras shorten the flange focal length compared to digital SLR cameras, interchangeable lenses that can be attached to digital SLR cameras cannot be used as they are

Method used

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  • Imaging Systems, Mounting Adapters, Imaging Devices
  • Imaging Systems, Mounting Adapters, Imaging Devices
  • Imaging Systems, Mounting Adapters, Imaging Devices

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0027] First, will use figure 1 The overall structure of the imaging system according to the first embodiment is described. figure 1 A structural example of the imaging system according to the first embodiment is shown.

[0028] The imaging system 1 is provided with an imaging device (camera body) 2 , a mount adapter 10 and a lens (interchangeable lens) 7 . The imaging device 2 is a camera body of a mirrorless digital single-lens camera that achieves reduction in size and weight by shortening the flange focal length more than a digital single-lens reflex camera. The lens 7 is an interchangeable lens for a digital single-lens reflex camera and cannot be directly mounted on the imaging device 2 because the flange focal length is different. Furthermore, there are cases where the lens 7 cannot be mounted on the imaging device 2 because the interfaces are different.

[0029] The mount adapter 10 is mounted between the imaging device 2 and the lens 7 . The mount adapter 10 adjus...

no. 2 example

[0092] Next, we will use Figure 9 Defocus amount adjustment processing according to the second embodiment is described. Figure 9 is a flowchart of defocus amount adjustment processing according to the second embodiment.

[0093] The second embodiment is different in that the amount of contrast is acquired in units of a predetermined drive amount of the lens 7 whereas the defocus amount adjustment processing of the first embodiment acquires the amount of contrast in units of a predetermined defocus amount of the AF sensor unit 13 . In the detailed description of the second embodiment, unless otherwise specified, the overall structure of the imaging system 1 is the same as that of the first embodiment, and thus their descriptions are omitted.

[0094] [Step S41] The imaging apparatus 2 starts a focus detection operation using the contrast method.

[0095] [Step S42 ] The imaging device 2 starts driving of the lens 7 .

[0096] [Step S43 ] The imaging device 2 performs focus...

no. 3 example

[0099] Next, we will use Figure 10 The adjustment information table of the mount adapter according to the third embodiment is described. Figure 10 One example of the adjustment information table of the mount adapter according to the third embodiment is shown. The mount adapter adjustment information table 140 of the third embodiment is stored in the storage section 101 of the mount adapter 10 . Furthermore, the mount adapter adjustment information table 140 is a data table in which adjustment amounts correspond to combinations of the lens 7 and the imaging device 2 (camera). For example, based on the combination of camera (CB0) and lens (L0), the corresponding adjustment amount is adjustment amount (dm00). If it is the lens (L1) and camera (CB0), the corresponding adjustment amount is the adjustment amount (dm01). Also, for the camera (CB1) and the lens (L1), the corresponding adjustment amount is the adjustment amount (dm11).

[0100] The mount adapter adjustment inform...

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Abstract

The present invention relates to an imaging system, a mounting adapter, an imaging device and a program. An imaging system includes: an imaging device provided with an imaging device; and a mount adapter that adjusts a flange focal length between the imaging device and an interchangeable lens, wherein the mount adapter is provided with a phase difference focus detection section that performs focus detection from a phase difference and An optical device that divides incident light from an interchangeable lens into incident light of an imaging device and incident light of a phase difference focus detection section, and the imaging device is provided with a contrast focus detection section that performs focus detection from contrast using the imaging device, adjusting phase difference focus detection The adjustment part of the focus position of the part, and the adjustment control part of the adjustment control of the focus position activated by the detection of the mounting of the mount adapter and the interchangeable lens.

Description

technical field [0001] The present invention relates to an imaging system, a mount adapter, an imaging device and a program. Background technique [0002] In recent years, the use of digital single-lens reflex cameras has grown rapidly, but it has not been able to respond to demands for further reduction in size and weight of camera bodies. This is because a digital SLR camera needs to house a mirror that switches between the imaging light path and the viewfinder light path, and a pentaprism that guides the subject image to the viewfinder (OVF: Optical Viewfinder) in the camera body. [0003] Therefore, by providing an electronic viewfinder (EVF) instead of the OVF, a so-called mirrorless digital single-lens camera (mirrorless digital single-lens camera) that achieves size and weight reduction by removing a mirror is introduced. However, since a sub-mirror that guides incident light to a focus detection portion is removed together with a mirror, a mirrorless digital single-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225H04N5/232G03B17/14G03B13/36
CPCG03B13/36G03B17/14H04N23/672H04N23/673
Inventor 村岛伸治中村真备赤松范彦
Owner SONY CORP
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