> ## Documentation Index > Fetch the complete documentation index at: https://crsdk.app/llms.txt > Use this file to discover all available pages before exploring further. # Power zoom control > Control power zoom lenses. Requires a power zoom lens to be attached. ## OpenAPI ````yaml /openapi.yaml post /api/cameras/{cameraId}/actions/zoom openapi: 3.1.0 info: title: Alpha Camera REST API version: 3.0.0 description: > RESTful control for Sony cameras — shooting, settings, live view with OSD overlay, focus control, and file transfer through a clean HTTP interface. Built on the Sony Camera Remote SDK. Supports USB and network camera connections with multi-camera simultaneous operation. ## Connection Modes | Mode | Description | |------|-------------| | `remote` | Full camera control: shooting, settings, live view. Auto-transfer images to host PC. | | `remote-transfer` | Camera control + explicit SD card file access. Most capable mode. | | `contents` | SD card file access only. No shooting or settings control. | ## Quick Start 1. `GET /api/cameras` — discover cameras 2. `POST /api/cameras/{id}/connection` — connect 3. `PUT /api/cameras/{id}/priority-key` — set to `pc-remote` 4. `PUT /api/cameras/{id}/properties/{name}` — configure settings 5. `POST /api/cameras/{id}/actions/af-shutter` — shoot 6. `DELETE /api/cameras/{id}/connection` — disconnect ## Priority Key Requirement The camera's priority key **must** be set to `pc-remote` before it accepts any remote property changes or shooting commands. license: name: Proprietary contact: name: Camera Remote SDK url: https://github.com/ocjlee888/camera-remote-sdk-project servers: - url: http://{host}:{port} description: | Local camera server. The server binary runs on the host that has the camera physically connected (USB or network). Defaults to `http://localhost:8080`; override `host` and `port` when the server runs on a different machine (e.g. a Raspberry Pi next to the camera). variables: host: default: localhost description: Host running the camera server binary port: default: '8080' description: Port the camera server is listening on security: [] tags: - name: Connection description: Camera discovery, connection, and disconnection - name: Properties description: Read and write camera properties (ISO, aperture, shutter speed, etc.) - name: Actions description: Shooting commands and motor control (shutter, zoom, focus) - name: Live View description: Live view streaming and OSD overlay control - name: Events description: Server-Sent Events for real-time camera callbacks - name: SD Card description: SD card file browsing and download - name: Settings description: Save path configuration and camera settings file management - name: Server description: Server health, status, and log retrieval paths: /api/cameras/{cameraId}/actions/zoom: post: tags: - Actions summary: Power zoom control description: Control power zoom lenses. Requires a power zoom lens to be attached. operationId: controlZoom parameters: - $ref: '#/components/parameters/cameraId' requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ZoomRequest' responses: '200': description: Zoom command executed content: application/json: schema: $ref: '#/components/schemas/CameraResponse' '400': $ref: '#/components/responses/OperationRejected' components: parameters: cameraId: name: cameraId in: path required: true description: Camera identifier (e.g. `D10F60149B0C`) schema: type: string schemas: ZoomRequest: description: | Power zoom command. The server accepts two forms: - **Direction + speed preset** (`ZoomDirectionalRequest`): `{ "direction": "in" | "out", "speed": "normal" | "fast" }`. - **Signed speed** (`ZoomSignedSpeedRequest`): `{ "speed": -10..+10 }`. Negative = zoom out, positive = zoom in, magnitude = speed. `0` stops the zoom. The two forms are disjoint on the `speed` field's JSON type, so generated SDKs may either expose them as an untagged union or surface one method per form (see `x-fern-sdk-method-name` on the endpoint). oneOf: - $ref: '#/components/schemas/ZoomDirectionalRequest' - $ref: '#/components/schemas/ZoomSignedSpeedRequest' CameraResponse: type: object description: | Generic envelope returned by most camera operations. The shape of `data` varies per endpoint — most operations return an empty or null `data`; operations that return structured data document a specific shape. SDK-generated types can treat `data` as an opaque map for generic endpoints. required: - success properties: success: type: boolean message: type: string camera: $ref: '#/components/schemas/CameraSummary' data: type: object additionalProperties: true ZoomDirectionalRequest: type: object description: Direction + named speed preset. required: - direction - speed properties: direction: type: string enum: - in - out speed: type: string enum: - normal - fast ZoomSignedSpeedRequest: type: object description: | Signed speed in range `-10..+10`. Positive = zoom in, negative = zoom out, magnitude = speed. `0` stops an in-progress zoom. required: - speed properties: speed: type: integer minimum: -10 maximum: 10 CameraSummary: type: object description: Camera info embedded in API responses properties: connected: type: boolean example: false model: type: string example: ILCE-7M4 id: type: string example: D06CE05E3323 ErrorResponse: type: object description: | Standard non-2xx response envelope. The API does not currently expose a stable machine-readable error code in the JSON body, so clients should branch on HTTP status first and then inspect `message` for the human-readable reason. example: success: false message: Camera not connected camera: connected: false model: ILCE-7M4 id: D06CE05E3323 required: - success - message properties: success: type: boolean const: false example: false message: type: string example: Camera not connected camera: $ref: '#/components/schemas/CameraSummary' responses: OperationRejected: description: | The request was syntactically valid, but the camera or server rejected it due to connection state, unsupported capability, property writability, current shooting mode, or another runtime precondition. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' ````