SKU: BMD-CINEURSAMUPROTB4HD

Blackmagic Design BMD-CINEURSAMUPROTB4HD Blackmagic URSA Mini Pro B4 Mount

$579.00

Items Included

Blackmagic Design BMD-CINEURSAMUPROTB4HD Blackmagic URSA Mini Pro B4 Mount

Item Notes

Condition: Fully Working 5 availableⓘ

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Description

The URSA Mini Pro B4 Mount from Blackmagic Design is a replacement mount for use on the URSA Mini Pro. This mount enables using your ENG-style B4 mounted HD lens on your URSA Mini Pro. The mount incorporates corrective optics that enable the use of a lens designed to work on a camera with three sensors and a prism, on the URSA Mini Pro, which is a single-sensor camera, without the image suffering from optical degradation. Read more

Features

For HD Lenses with B4 Mount.Spherical-Aberration Correction.Integrated Optical Elements.Includes Shim Set.

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Features

For HD Lenses with B4 Mount.Spherical-Aberration Correction.Integrated Optical Elements.Includes Shim Set.

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About the Blackmagic Design BMD-CINEURSAMUPROTB4HD Blackmagic URSA Mini Pro B4 Mount

The Blackmagic Design URSA Mini Pro B4 Mount is an interchangeable lens mount adapter that allows the URSA Mini Pro 4.6K G2 and URSA Broadcast G2 cameras to utilize standard B4-mount broadcast and ENG (Electronic News Gathering) lenses. This mount is engineered for live production, sports broadcasting, and studio environments where the operational benefits of broadcast lenses—such as power zoom, servo-driven focus and iris, and built-in optical image stabilization—are essential.

It features an integrated optical element that corrects for the inherent magnification and focal length shift that occurs when projecting the large image circle of a 2/3-inch B4 lens onto the camera's larger Super 35mm sensor. This optical correction ensures the lens performs as intended, maintaining its advertised field of view and focus calibration.

The mount includes electronic contacts that communicate with the camera, enabling control of zoom, focus, and iris via the camera's side grip controls, a connected studio remote, or a compatible control panel, seamlessly integrating broadcast lens functionality into the URSA Mini Pro ecosystem.

Key Features

For HD Lenses with B4 Mount.Spherical-Aberration Correction.Integrated Optical Elements.Includes Shim Set.

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Blackmagic Design BMD-CINEURSAMUPROTB4HD Blackmagic URSA Mini Pro B4 Mount Specs

Compatibility & Mount

Compatible Cameras

URSA Mini Pro 4.6K G2, URSA Broadcast G2

Mount Type

B4 Mount with electronic contacts

Optical System

Integrated glass optical group for 2/3" to Super 35 sensor adaptation

Lens Communication

Full electronic communication for zoom, focus, and iris control

Optical Performance

Focal Length Factor

Approximately 1.7x (varies slightly; a 14x B4 lens behaves like a 24x lens in terms of field of view on the S35 sensor)

Aperture

Maintains the lens's native f-stop range with minimal light loss from the optical group

Control & Connectivity

Control Protocol

Blackmagic URSA Lens Protocol / Standard B4 servo protocol

Control Functions

Enables electronic control of Zoom, Focus, and Iris from camera controls or external units (e.g., Focus Demand)

Connection

Connects directly to camera's internal lens control circuitry

Physical & Electrical

Construction

Precision metal and optical glass assembly

Power for Lens

Provides power to B4 lens servo motors directly from the camera

Weight

Substantial due to optical elements and metal housing

Installation

User-installable; replaces the camera's factory default mount

Key Features

For HD Lenses with B4 Mount.Spherical-Aberration Correction.Integrated Optical Elements.Includes Shim Set.

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