Blackmagic Design URSA Cine B4 Lens Mount

Overview

The Blackmagic Design URSA Cine B4 Lens Mount is a dedicated lens mount adapter designed to let you use B4 broadcast and box-style lenses on a compatible Blackmagic URSA Cine camera. Built specifically for URSA Cine workflows, it incorporates optical elements that are matched to the camera’s RGBW sensor design, helping maintain image quality while adapting professional broadcast optics for cinema and live production use.

This mount is particularly useful for productions that want to combine the reach, servo operation, and familiar handling of B4 lenses with the imaging capabilities of the URSA Cine platform. In addition to enabling B4 lens compatibility, it supports the camera’s 4.6K B4 crop 16:9 mode at frame rates up to 240 fps, making it well suited to broadcast, sports, studio, event, and specialty high-frame-rate workflows.

Core Features

• The mount is designed for using B4 broadcast and box-style lenses on compatible Blackmagic URSA Cine cameras.
• Its integrated optics are matched to the URSA Cine RGBW sensor to support proper image formation when adapting B4 lenses.
• The optical design helps reduce spherical aberration for improved image performance with supported broadcast lenses.
• It enables access to the URSA Cine 4.6K B4 crop 16:9 recording mode for broadcast-oriented image capture.
• The mount supports frame rates up to 240 fps in the camera’s 4.6K B4 crop 16:9 mode.
• Its metal construction is designed for dependable professional use in studio, field, and live production environments.

Built for Broadcast Lens Use

The URSA Cine B4 Lens Mount is designed for productions that rely on traditional broadcast and box-style lenses. This makes it a strong fit for studio, live event, sports, and television workflows where B4 optics remain a practical and familiar choice.

Optically Matched for URSA Cine

Rather than functioning as a simple mechanical mount, this adapter includes optical elements tailored to the URSA Cine RGBW sensor. That design helps preserve compatibility and reduce spherical aberration when pairing the camera with B4 lenses.

High-Speed B4 Crop Operation

By enabling the camera’s 4.6K B4 crop 16:9 mode at up to 240 fps, the mount supports workflows that benefit from both broadcast lens handling and high-frame-rate capture. This can be especially valuable for fast-paced live production and specialty motion work.