---
title: SIGMA 28-45mm T2.0 AF Cine Zoom Prototype Lens
description: Sigma's new 28-45mm T2.0 AF Cine Zoom prototype lens is debuting at IBC 2024.
---

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# [SIGMA 28-45mm T2.0 AF Cine Zoom Prototype Lens](https://www.redsharknews.com/sigma-28-45mm-t2.0-af-cine-zoom-prototype-lens)

 Written by [Heath McKnight](https://www.redsharknews.com/author/heath-mcknight) | Sep 14, 2024 7:09:01 AM

Recently, in our [fall lens roundup](https://www.redsharknews.com/lens-roundup-fall-2024-dzofilm-cine-primes-sigma-prototype-and-more), we told you about the prototype 28-45mm T2.0 AF Cine Zoom lens Sigma will be showcasing at [IBC 2024](https://www.redsharknews.com/the-10-top-things-to-see-at-ibc2024), and the company has now confirmed some more details.

Sigma has shed some additional light on the prototype 28-45mm AF Cine Zoom lens, and also corrected the fastest speed of the aperture: It’s T2.0 and not T1.8, as originally speculated.

It is designed based on a very similar lens, the Sigma 28-45mm T1.8 DG DN | Art lens. Hence, the original thought the prototype would also be T1.8. Made for full-frame mirrorless cameras it features a T2.0-T16 aperture, and 11 rounded diaphragm blades.

This is Sigma's first ever cinema lens with AF, and the redesign has been done with video sensibilities in mind. It now includes a focus ring with distance indicator, a click-free aperture ring, and compatibility with Φ95mm matte boxes.

It has an impressive 0.3 m minimum focusing distance (0.98’), and a 1:4 magnification ratio (at f=45). Size-wise it has a 95mm (3.8”) front diameter and 86mm (3.39") filter size and weighs 1250 g / 44.1 oz.

It comes in two initial versions, L-Mount and Sony E-Mount, that are 151.8mm / 6 in and 153.8mm / 6.1 in long respectively.

Pricing and a release date have not been revealed yet, but the Art version came out in June 2024 and retails for $1349. At IBC, Sigma is still calling it a prototype, even though it looks pretty production ready to our eyes.

## Key specs

 

| Focal Length | 28-45mm |  |
| --- | --- | --- |
| Lens Mount | L-Mount, SONY E-mount |  |
| Aperture | T2-16 |  |
| Number of Diaphragm Blades | 11 (Rounded diaphragm) |  |
| Minimum Focusing Distance*1 | 0.3 m |  |
| Magnification Ratio | 1:4 (at f=45mm) |  |
| Front Diameter | 95 mm / 3.8" |  |
| Filter Size *2 | 86 mm |  |
| Focus Rotation | 200° |  |
| Zoom Rotation | 60° |  |
| Length *3 | L-Mount | 151.8mm / 6 in. |
| Sony E-mount | 153.8mm / 6.1 in. |  |
| Weight *4 | L-Mount, Sony E-mount | 1,250 g / 44.1 oz. |
| Angle of View | FF *5 | 65.5-43.6° |
| APS-C *6 | 45.9-29.5° |  |

 

 

[View full post](https://www.redsharknews.com/sigma-28-45mm-t2.0-af-cine-zoom-prototype-lens)

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