Canon RF-S 7.8mm F/4 STM Dual Lens

The Canon RF-S 7.8mm F/4 STM Dual Lens is a stereoscopic dual-lens prime designed for Canon EOS R-series APS-C mirrorless cameras such as the EOS R7. Unlike traditional single-lens optics, this lens is built with two lens elements that work together to capture depth information, enabling the creation of 3D and spatial videos or photos that can be experienced on compatible devices.

 Key Features

Dual-Lens Stereoscopic Design

• This lens features two synchronized optical paths that mimic the slightly different viewpoints of left and right eyes — allowing it to record true stereoscopic depth and create immersive 3D imagery.

• The interpupillary distance between the lenses is around 11.8 mm, providing natural-looking spatial depth for subjects that are relatively close.

Focal Length & Field of View

• 7.8 mm focal length gives a wide field of view (~60–63°) on APS-C cameras, creating a natural and immersive perspective.

• On Canon APS-C bodies like the EOS R7, this equates to roughly 12.6 mm in 35 mm full-frame terms.

 Aperture & Optics

• Maximum aperture: f/4 — suitable for general use and offers consistent performance across both lens barrels.

• Optical design: Around 9 elements in 7 groups with 2 UD (Ultra-Low Dispersion) elements that help control chromatic aberration and improve clarity.

• Equipped with Canon’s Super Spectra Coating (SSC) for reduced flare and ghosting.

⚙️ Focus & Control

• STM (Stepping Motor) autofocus delivers smooth, quiet, and accurate focusing for both video and stills.

• Full-time manual focus allows quick, fine adjustments without changing camera settings.

• A focus differential adjustment switch lets you independently control or balance focus between the two lenses for optimal 3D effect.

 Creative Workflow Integration

• Captured footage can be processed into spatial video formats such as 3D 180°, 3D Theater, and VR using Canon EOS VR Utility or an Adobe Premiere Pro plug-in (software may require a subscription).

• Designed to work seamlessly with immersive displays including Apple Vision Pro and Meta Quest 3, enabling true 3D playback experiences.

Technical Overview