Sirui - 'IronStar T1.9 1.5x Anamorphic Full Frame Cine Three-Lens Kit'
35mm + 45mm + 60mm
Neutral Flare
ARRI PL/EF Mount
Three Lenses, Covering the Core Focal RangeThe Sirui IronStar T1.9 1.5x Anamorphic Full Frame Cine Three-Lens Kit is a professional-grade set of anamorphic lenses designed to bring cinematic precision and vintage character to modern filmmaking. Featuring three essential focal lengths, 35mm, 45mm, and 60mm, each lens offers a fast T1.9 aperture for excellent low-light performance and smooth bokeh. With a consistent 1.5x squeeze ratio, these lenses deliver true-widescreen CinemaScope aspect ratios of up to 2.66:1, capturing wide fields of view on full-frame sensors. The set combines cutting-edge optics, including ED, aspherical, and HRI glass elements, with classic anamorphic blue and neutral flare options, minimal focus breathing, and a compact, lightweight design with interchangeable PL and EF mounts for versatile professional use across diverse shooting scenarios.
1.5X Constant Squeeze Ratio
cinematic look and feelCompared to 1.33X, 1.5X provides a wider horizontal view, stronger background compression, and more elliptical bokeh, enhancing the overall cinematic look and feel.
3:2 mode2.25:1 widescreen aspect ratio
16:9 mode2.66:1 widescreen aspect ratio
Fast Aperture
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Cinema-Level Optical Quality
optical elementsThe IronStar series features 19-20 precision optical elements, including ED, aspherical and HRI components. It delivers sharp, accurate imagery with a subtle vintage glow—where modern engineering meets classic cinematic aesthetics.
| Focus Distance | Optical Structure | Aspherical Lens | Cylindrical Lens | HRI Glass | ED Glass |
|---|---|---|---|---|---|
| 35mm | 20 elements in 60 groups | 1 | 6 | 5 | 1 |
| 45mm | 19 elements in 14 groups | 1 | 4 | 5 | 1 |
| 60mm | 19 elements in 14 groups | 1 | 5 | 5 | 1 |
Well-Controlled Focus Breathing
image stability and consistencyNear-zero focus breathing during focus shifts maintains image stability and consistency, essential for professional cinematic workflows.
Cinematic-Level Design
Compact and UnifiedThe IronStar series lenses feature a uniform appearance and consistent colour temperature and tone, ensuring a cohesive visual style throughout the entire creative process.
Wide CompatibilityFilter thread: Φ92mm/3.6inch
Included: CPL and VND filters (kit only)
Front diameter: Φ95mm/3.7inch
Identical Gear PositionDesigned for fast lens swaps easing the process of follow focus and accessory adjustments
Compact & Lightweight990g / 2.2lb (35mm) Lighter than other full-frame anamorphic lenses on the market
270° Focus ThrowUniform design
Metallic TextureRugged construction
1/4” Threaded BaseEnhance mounting stability
Dual MarkingsImperial & Metric
Efficient Production with StyleMeet diverse professional creative needs
Interchangeable PL/EF Mounts
dedicated toolsEach lens comes with a native PL mount and includes an EF mount with dedicated tools. Users can effortlessly switch between mounts as needed, significantly enhancing the lens's cost-effectiveness and operational versatility.
Innovative Back Focus Adjustment
flexible and efficient operationSimply turn the back focus adjustment ring with a tool instead of disassembling the mount or adding shims, providing a flexible and efficient operation experience.
Full-Frame Coverage
Larger Image CircleThe SIRUI IronStar series features a 46mm image circle, covering full-frame and even large-format cameras. It delivers clean, detailed, and wide images with no vignetting and cropping.
