Description
Sigma Aizu Prime 40mm T1.3 LF Cinema Lens: The Expansive “Normal” for Full Frame Storytelling
The Sigma Aizu Prime 40mm T1.3 LF Cinema Lens is an exceptional optical instrument designed to meet the rigorous demands of high-end cinematic productions. Engineered for large-format (LF) or full-frame sensor cameras, this prime lens offers a highly sought-after “normal” yet slightly expansive perspective with an exceptionally fast T1.3 aperture. It’s a cornerstone lens for capturing compelling narratives, naturalistic character interactions within their environments, and performing brilliantly in challenging low-light conditions, providing a field of view that feels inherently natural to the human eye.
Masterful Optical Design for Unrivalled Image Quality:
Originating from Sigma’s revered “Aizu” production facility, known for its precision engineering, this 40mm T1.3 prime lens delivers superb image quality across the entire full-frame sensor. It offers:
- Exceptional Sharpness: Razor-sharp detail from centre to edge, even wide open at T1.3, ensuring high-resolution capture that withstands critical scrutiny for 4K, 6K, and 8K productions.
- Minimal Aberrations: Meticulously corrected for chromatic aberration, distortion, and vignetting, providing clean, pure images without unwanted optical artefacts, saving valuable time in post-production.
- Consistent Colour Science: Designed to meticulously match the colour rendition of other Sigma Cine Prime lenses, ensuring seamless integration and a cohesive look across your entire lens set during production, simplifying colour grading.
- Beautiful Bokeh: The very fast T1.3 aperture, combined with a large number of iris blades, produces incredibly smooth and artistic background blur, allowing subjects to beautifully separate and achieve that sought-after cinematic dimensionality.
Ultra-Fast T1.3 Aperture for Low Light and Creative Depth of Field:
The incredibly wide T1.3 maximum aperture is a standout feature, making this lens an ideal choice for shooting in dim environments where every photon counts. It allows for natural light capture without relying heavily on high ISO settings, preserving image purity and dynamic range. Furthermore, this fast aperture provides exceptional control over depth of field, enabling cinematographers to achieve extremely shallow focus, drawing the viewer’s eye precisely where intended.
Robust Cine-Ready Construction:
Every aspect of the Sigma Aizu Prime 40mm T1.3 LF is crafted for the rigorous demands of professional filmmaking:
- Durable All-Metal Housing: Ensures exceptional longevity and resistance to the wear and tear of continuous set use, providing a reliable tool for years to come.
- Industry-Standard Gear Rings: Features standard 0.8 MOD gear rings on the focus and iris rings, ensuring seamless compatibility with follow focus systems, lens control motors, and other grip accessories.
- Clickless Iris Ring: Provides smooth, stepless aperture adjustments for seamless exposure transitions during recording, vital for professional video capture.
- Minimized Focus Breathing: Engineered to significantly suppress focus breathing, maintaining a consistent angle of view when pulling focus, which is critical for professional cinematography.
- Consistent Form Factor: Designed to maintain a consistent front diameter (e.g., 95mm) and similar physical dimensions across the Sigma Cine Prime series, simplifying matte box and filter changes, and streamlining workflow on set.
Full-Frame / Large-Format Sensor Coverage:
Optimized for full-frame and large-format cinema cameras, this 40mm prime lens ensures full coverage of larger sensors, maximizing the resolution and artistic potential of modern cinematic cameras. This focal length provides a natural, slightly wider-than-normal perspective that is highly versatile for narrative, documentary, and commercial applications, offering a comfortable blend of context and intimacy.
The Sigma Aizu Prime 40mm T1.3 LF Cinema Lens is an exceptional instrument for cinematographers seeking a versatile prime that offers unparalleled optical performance, extreme low-light capability, and robust cinematic construction for the most demanding professional productions. It’s a cornerstone lens for capturing visually stunning narratives with a natural, engaging perspective.
Key Features:
- Versatile 40mm Prime: Offers a natural, slightly wide-angle perspective for diverse scenes.
- Ultra-Fast T1.3 Maximum Aperture: Superb low-light performance and shallow depth of field.
- Designed for Full-Frame / Large-Format Sensors: Maximizes sensor utilization and artistic potential.
- Pristine Optical Quality: High sharpness, minimal aberrations, and consistent colour rendition.
- Robust, All-Metal Cine Housing: Built for professional durability and reliability.
- Industry-Standard 0.8 MOD Gear Rings: For seamless integration with cine accessories.
- Clickless Iris: Enables smooth, silent exposure pulls during recording.
- Minimised Focus Breathing: Maintains a consistent angle of view during focus shifts.
- Consistent Front Diameter: Simplifies matte box and filter changes across the series.

