SIRUI Astra Series 50mm, 75mm&100mm T1.8 1.33X Full-frame Anamorphic Cine Lens Kit (Z Mount, Neutral
SIRUI Astra Series 50mm, 75mm&100mm T1.8 1.33X Full-frame Anamorphic Cine Lens Kit (Z Mount, Neutral
The SIRUI Astra Series 50mm, 75mm & 100mm T1.8 1.33X Full-frame Anamorphic Cine Lens Kit (Z Mount, Neutral Flare) is suitable for Nikon Z-mount mirrorless cameras and can be used for both video recording and photography. These three prime lenses with fixed focal lengths of 50mm, 75mm, and 100mm use a constant 1.33× squeeze factor for a widescreen format without cropping the image or losing resolution. The fast T1.8 aperture helps you shoot effectively in low-light environments and creates a shallow depth of field. The optical system renders an image circle for both Full-Frame and APS-C sensors. The autofocus uses a quiet STM stepping motor, and the front filter thread has a diameter of 67mm.
Key features of the SIRUI Astra Series 50mm, 75mm&100mm T1.8 1.33X Full-frame Anamorphic Cine Lens Kit (Z Mount, Neutral Flare)
- Three lenses with 50mm, 75mm, and 100mm focal lengths cover a wide range of cinematic shots
- Constant 1.33× squeeze factor creates a cinematic 2.35:1 aspect ratio without image cropping
- T1.8 to T22 aperture provides control over both depth of field and exposure
- Fast and quiet autofocus supports smooth focusing for both photos and videos
- Neutral anamorphic flares preserve the natural colour rendition of the image
- Oval bokeh and vertical background stretching create a typical anamorphic look
- Uniform colour rendition across all three lenses simplifies post-production
- Identical gear ring placement enables quick lens changes
- Full-frame construction with Nikon Z mount
STM autofocus
The focusing system uses a quiet STM stepping motor for smooth operation during filming. The autofocus works quickly and accurately on Nikon Z mirrorless cameras when creating portraits and dynamic shots. A switch on the barrel is used for quick changes between automatic and manual focus modes. Users can easily react to changing conditions on set without needing to search through the camera menu.
Optical performance of the lenses
The optical system includes aspherical elements, which reduce the overall size of the barrel and correct optical aberrations. These elements suppress distortion and maintain high sharpness across the entire frame, from the centre to the edges. Consistent colour rendition across different focal lengths simplifies subsequent post-production and colour matching of shots. The T1.8 aperture provides a shallow depth of field to isolate the main subject.
On-body controls
The barrel features an aperture ring with the option to switch between smooth and clicked operation. A programmable FN button on the barrel body expands control options by assigning a selected function from the camera body. An aperture ring lock prevents accidental shifts in settings outside the chosen range or the Auto position. The body also has a dual scale in metres and feet for precise manual focusing. The triple-protected construction resists the ingress of dust, dirt, and splashing water when working outdoors.
Accessory compatibility
The front of the barrel has a 67mm filter thread and an outer diameter of 72mm. The gear rings for follow focus and aperture are in the same position as other versions in the same series. The unified gear position speeds up lens changes on camera cages without needing to readjust focusing systems. The lens can be combined with commonly available circular filters and LiDAR focusing systems.
Mount:
Nikon Z
Camera type:
Mirrorless
For sensor:
APS-C, Full Frame
Lens type:
Prime
Focal length:
50, 75 and 100mm
Aperture:
T1.8
Maximum aperture:
22
Filter diameter:
67mm
Specifications
Bayonet
Features
Functions
Dimensions
Specifications can be changed without notice. Images are for illustrative purposes only.
