Sigma 28-105mm T3 FF AF Cine Lens for Sony E (Imperial)

With a full-frame optical design based on the Sigma DG DN Art lens and powered by an HLA linear motor, the Sigma 28-105mm T3 FF AF Cine Lens introduces a constant T3 aperture across a practical zoom range. It delivers consistent resolution, smooth bokeh and controlled flare, while the High-response Linear Actuator provides accurate, near-silent autofocus, with a dedicated AF/MF switch for quick control changes. Cine-standard ergonomics and a 200° focus throw provide reliable control.

Sigma 28-105mm T3 FF AF Cine Lens Key Features:

• Full-frame 28-105mm T3 cine zoom for versatile narrative coverage
• Based on Sigma Art optical design for high resolution and smooth bokeh
• Constant T3 aperture maintains exposure across the zoom range
• HLA linear autofocus motor delivers fast, quiet subject tracking
• 12-blade diaphragm produces natural, rounded highlight rendering
• Clickless iris ring with 54° rotation allows smooth exposure adjustment
• AF/MF Switch quickly toggles between auto and manual focus
• Minimum focus distance of 0.4m supports close framing
• Maximum magnification ratio of 1:3.1 at close focus
• 200° focus rotation enables precise manual focus control
• 0.8M pitch gears support standard follow focus systems
• 95mm front diameter with standard 82mm filter thread compatibility
• Dust- and splash-resistant construction with lens support foot included

What’s new?

The Sigma 28-105mm T3 FF AF Cine Lens extends the AF Cine Line with a constant T3 aperture across a broad 28-105mm focal range. Its optical system is based on the Sigma 28-105mm F2.8 DG DN Art design, and is adapted for cinema use with geared focus, zoom, and iris rings. A 12-blade diaphragm replaces stills-oriented aperture systems to produce controlled highlight rendering, while the HLA linear motor enables responsive autofocus with stable tracking during movement.

Mechanically, the lens features 0.8 module gearing across all control rings, a 200° focus throw, and a 54° iris rotation to support repeatable manual operation. A dedicated lens support foot stabilises the barrel when mounted to a rig, preventing weight imbalance. The addition of a clickless iris lock mechanism and a matching 95mm front diameter aligns it with current Sigma cinema accessories - an expansion of the AF Cine Line.

Optical design and image rendering

The 28-105mm T3 lens uses a full-frame optical construction derived from Sigma’s 28-105mm F2.8 DG DN Art lens architecture. This design maintains resolution across the frame while controlling flare and ghosting through refined element arrangement and coatings. The result is consistent contrast and edge definition throughout the zoom range, from 65.5° at 28mm to 19.5° at 105mm on full-frame cinema sensors.

Because transmission remains consistent during zooming, exposure does not shift when reframing, which simplifies lighting continuity and shot matching. The 12-blade diaphragm produces stable, rounded highlights and smooth tonal transitions in defocused areas, supporting controlled depth rendering in production. The minimum focus distance of 0.4m, measured from the image plane, allows closer framing at mid-telephoto lengths. This enables tighter subject isolation without requiring lens changes.

Autofocus system with HLA drive

The lens incorporates Sigma’s High-response Linear Actuator. This motor directly drives the focus group with linear motion, reducing mechanical delay and minimising operational noise. The behaviour allows stable, quiet subject tracking during handheld movement or gimbal operation. Because the HLA motor maintains a consistent response during rapid focus shifts, focus transitions remain controlled when subjects move unpredictably. Near-silent operation also reduces audible interference when recording with on-camera microphones or compact audio setups.

When switched to manual focus, the 200° rotation of the focus ring provides extended travel. This longer rotation angle increases precision during fine adjustments, supporting repeatable focus pulls.

Cinema-standard mechanical integration

The mechanical system uses 0.8-module gearing on the focus, zoom, and iris rings. This pitch matches industry-standard follow focus and motor units, allowing direct integration with cine accessories. The 95mm front diameter and 82mm filter thread also support common matte box and filter systems. The outer barrel has a maximum diameter of 96 mm, maintaining compatibility with standard lens clamps and support brackets.

The zoom ring rotates through 70°, balancing rapid focal length changes with controlled framing adjustments. The iris ring rotates through 54° and operates without clicks, enabling smooth exposure transitions during recording. An iris lock mechanism secures the ring in position when camera-side aperture control is required.

Handling, support and construction

The lens measures 159.9mm in length and weighs 1.3kg, excluding the lens support foot and caps. This lens balance supports stable operation on shoulder rigs and motorised gimbals designed for full-frame cine lenses. When mounted to a rig-based lens support, the support foot also reduces strain on the mount interface and improves stability during extended production sessions.

The barrel incorporates dust- and splash-resistant construction. While not waterproof, this structure reduces the likelihood of moisture ingress during light rain, maintaining operational reliability.

What’s in the box?

• 1 x Sigma 28–105mm T3 FF AF Cine Lens - Sony E-Mount
• 1 x Lens Support Foot (SF-91)
• 2 x M3×8 Lens Support Foot Fixing Screws
• 1 x Hex Key
• 1 x Front Lens Cap
• 1 x Rear Lens Cap

FAQs:

Does the Sigma 28-105mm T3 FF AF Cine Lens support autofocus during video recording?

The integrated HLA linear motor drives the focus group with direct linear motion, enabling responsive autofocus with minimal operational noise. This feature allows stable subject tracking during handheld, gimbal, or tripod-based recording.

How close can I get to my subject?

The lens focuses down to 0.4m from the image plane and offers a maximum magnification ratio of 1:3.1. This allows you to frame smaller details more tightly at 105mm without changing lenses, which is useful for product shots, inserts, or detail work within a larger scene.

How much control do I get when focusing manually?

The focus ring rotates through 200°, providing a smooth, controlled movement from near to far focus. This extended rotation makes fine adjustments easier and helps you place focus exactly where you want it. When using a follow focus system, the longer throw also makes repeatable focus pulls more consistent and predictable.

Can the iris be controlled from the camera body?

Yes. The iris ring can be set to the “A” position, allowing aperture control from compatible camera systems. The iris lock switch secures or releases this position to prevent accidental changes.

Is the Sigma 28-105mm T3 FF AF Cine Lens compatible with cinema accessories?

Yes. The 0.8 module gearing on focus, zoom and iris rings integrates directly with industry-standard follow focus and motor systems. The 95mm front diameter and 82mm filter thread also support common matte box and filter configurations.