SIGMA 28-45mm T2 Prototype Autofocus Cine Lens Specs Revealed

Lens NewsIBC 2024

by Alexandra ThompsonSeptember 13^th, 2024

At IBC 2024, SIGMA is presenting a prototype of the SIGMA 28-45mm T2 autofocus cinema lens based on the recently launched 28-45mm F1.8 DG DN | Art stills version. This new cine lens is currently still under development, but let’s have a look at the details we have so far.

Just a few days ago, SIGMA introduced the full-frame 28-105mm f/2.8 DG DN | Art lens. Now, at IBC 2024, they will be showcasing a “proof-of-concept” prototype AF cinema lens based on the SIGMA 28-45mm F1.8 DG DN | Art, and as a refresher, this is the world’s fastest full-frame zoom lens with a constant f/1.8 aperture. Last month, we wrote about what we could expect from this prototype. The following video shows you some of the features the prototype is based on:

SIGMA 28-45mm T2 autofocus cine lens prototype

The new lens is still under development, according to SIGMA. Still, the specs on it say it will be an autofocus, fast-aperture cine zoom with geared zoom, focus, and iris rings, distance markings in both meters and feet, a de-clicked aperture, and compatibility with Φ86mm screw-on filters and Φ95mm matte boxes. There’s also an AF/MF switch to move between the two different focusing modes.

The lens will initially be available with Sony E or Leica L mount options. Please mind that this product is still in development, but here are the available specs, as published by SIGMA:

• Focal length: 28-45mm
• Lens mount: L-Mount, Sony E-mount
• Aperture: T2-16
• Number of Diaphragm Blades: 11 (Rounded diaphragm)
• Minimum Focusing Distance: 0.3m
• Magnification Ratio: 1.4 (at f=45mm)
• Front Diameter: 95mm / 3.8 in
• Filter Size: 86mm
• Focus Rotation: 200°
• Zoom Rotation: 60°
• Length: L-Mount-151.8mm/6 in, Sony E-mount: 153.8mm/6.1in
• Weight: L-mount and Sony E-mount 1,250g/44.1oz
• Angle of View: FF: 65.5-43.6°, APS-C: 45.9-29.5°

Price and availability

As the new cine lens is in development, we have no information about pricing or when it will be released. We will keep you updated as we learn more!

For more information on SIGMA cine lenses, visit their website here.

Will you be attending IBC 2024 this year? Is the new SIGMA prototype cine lens something you want to see? Let us know in the comments below!