SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Neutral Flare)
SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Neutral Flare)
The SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Neutral Flare) enables you to shoot wide-screen video and photos on Nikon Z-mount mirrorless cameras. The optical system projects the image onto both Full-Frame and APS-C sensors. A constant 1.33× squeeze factor changes the aspect ratio to a cinematic 2.4:1 format without needing to crop the image and without losing sensor resolution. The fixed 75mm focal length provides a natural perspective with a slight zoom. The optical design includes aspherical elements that suppress distortion and maintain sharpness across the entire frame.
Key Features of the SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Neutral Flare)
- Full-frame anamorphic lens with a 1.33× squeeze factor
- 75mm focal length and T1.8 to T22 aperture
- Fast and quiet autofocus for both photos and video
- Neutral horizontal flares with a characteristic anamorphic look
- Oval bokeh and vertical background stretching for a cinematic look
- Uniform colour rendering with other lenses in the series
- All-metal construction for high durability
- 67mm filter thread allows for the use of common accessories
- AF/MF switch and a programmable Fn button simplify operation
Cinematic Format
The anamorphic design horizontally compresses the image, using the entire sensor area without the need for cropping. After de-squeezing, the resulting footage has a 2.4:1 aspect ratio, corresponding to widescreen cinematography standards. This optical system preserves the full resolution of the sensor without any loss of pixels. The lens creates neutral horizontal anamorphic flares and vertically stretched, out-of-focus points in the background that accompany the classic cinematic look.
Aperture and Bokeh
The fast T1.8 aperture makes it easier to work in low-light conditions and helps to separate the subject from the background. The aperture ring operates in the T1.8 to T22 range for precise exposure control. The optical system creates a typical oval bokeh with vertical background blurring. The aperture can be controlled manually using the ring, which offers smooth, de-clicked operation for silent exposure changes during filming, or a clicked mode for photography.
Autofocus
Autofocus is driven by a quiet STM stepping motor, optimised for smooth transitions in video. The system works with the camera body's subject and face tracking algorithms. The focus drive exhibits stable and smooth operation when shooting dynamic scenes and creating portraits. The minimum focusing distance is 60.5cm from the sensor plane for detailed close-up shots without loss of sharpness.
On-body Controls
On the barrel, there is a switch for toggling between automatic and manual focus for quick reactions to scene changes. The customisable FN button is used to assign selected functions directly from the camera menu. An aperture ring lock prevents accidental changes to the aperture value while handling the equipment. The body features an integrated dual focus scale in metres and feet, and gearing for a follow focus system. The geared focus and aperture rings are in the same position as on other lenses in the Astra series, allowing for quick lens changes without needing to readjust the follow focus.
Durable Construction
The all-metal construction contributes to high mechanical durability for daily professional use. Seals at critical points prevent dirt and water from entering the internal parts of the lens. Triple protection resists dust, splashing water, and dirt when working in challenging outdoor environments. The front optical element has protective coatings that make cleaning easier and prevent greasy fingerprints from settling on the glass.
Mount:
Nikon Z
Lens Type:
Prime
Focal Length:
75mm
Aperture:
T1.8
Maximum Aperture:
22
Filter Diameter:
67mm
Minimum Focusing Distance:
60.5cm
Weight:
0.666kg
Specifications
Bayonet
Features
Functions
Dimensions
Weight
Specifications can be changed without notice. Images are for illustrative purposes only.
