SMALLRIG SR 3666

Baseplate for Sony Alpha 7 IV and Alpha 7R V

The SmallRig SR 3666 is a dedicated camera baseplate designed for the Sony Alpha 7 IV and Sony Alpha 7R V full-frame mirrorless cameras. It attaches to the bottom of the camera to provide a stable mounting platform, improve handling and support a range of compatible accessories. Its low-profile construction preserves the compact dimensions of the camera, making it suitable for photography, handheld video recording and tripod-based shooting.

Lightweight Aluminium Construction

The baseplate is manufactured from aluminium alloy, providing a rigid mounting surface with minimal additional weight. It measures approximately 132 × 65 × 12.5 mm and weighs around 95 g. Its slim profile helps maintain a balanced camera setup without adding unnecessary bulk, while the durable metal construction provides a dependable foundation for mounting and supporting compatible equipment.

Secure Camera Attachment

The baseplate attaches to the camera using a standard 1/4"-20 screw and a locating pin. This combination helps keep the plate securely aligned and reduces the risk of unwanted rotation during use. A built-in silicone pad cushions the contact surface, helping protect the camera’s underside from scratches and supporting a stable connection between the camera and the baseplate.

Integrated Arca-Type Quick-Release Profile

The underside incorporates an Arca-type dovetail profile, allowing the camera to be mounted directly on compatible Arca-style tripod heads without requiring a separate quick-release plate. This simplifies transitions between handheld operation and tripod shooting. The integrated design also reduces the number of individual components attached to the camera, helping maintain a streamlined setup.

Accessory Mounting Options

The baseplate features 1/4"-20 threaded mounting holes for compatible accessories and support equipment. An integrated cold shoe provides an additional mounting point for suitable accessories, such as a compact microphone or wireless audio receiver. These interfaces allow the baseplate to serve as more than a simple protective plate, offering practical expansion options for lightweight photography and video configurations.

Comfortable Grip and Practical Design

Leather-covered side sections provide a more comfortable contact surface when holding the camera and complement the camera body's design. A dedicated strap attachment point allows a compatible wrist strap or lanyard to be connected without obstructing the other mounting points. The low-profile shape is intended to improve handling while preserving access to the camera’s normal operating functions.

Compatibility and Included Accessories

The SmallRig SR 3666 is designed for the Sony Alpha 7 IV and Sony Alpha 7R V. Its integrated quick-release profile supports compatible Arca-type tripod heads, while the threaded holes and cold shoe accommodate selected accessories. The package includes one baseplate and a magnetic flat-head screwdriver stored in the baseplate itself, allowing the mounting screw to be tightened or loosened without carrying a separate tool.

• SmallRig Baseplate for Sony Alpha 7 IV / Alpha 7R V (SR 3666)