SIRUI Astra Series 100mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Blue Flare)
SIRUI Astra Series 100mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Blue Flare)
The SIRUI Astra Series 100mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Blue Flare) lets you shoot widescreen cinematic footage on Nikon Z-mount mirrorless cameras. This prime lens, with a fixed 100mm focal length and T1.8 aperture, renders an image field for both Full Frame and APS-C sensors. The construction combines optical elements with mechanical controls for smooth focusing and aperture changes while filming. The anamorphic optical system creates blue flares and an oval bokeh from light sources. Its all-metal body provides mechanical protection for the internal optical elements. An aspherical optical element corrects geometric distortion and helps maintain the compact dimensions of the entire barrel. Dust and moisture seals protect the internal electronics and optics from adverse weather conditions.
Key features of the SIRUI Astra Series 100mm T1.8 1.33X Full-frame Anamorphic Cine Lens (Z Mount, Blue Flare)
- Covers full-frame sensors
- T1.8 aperture allows for shooting in low light and creates a soft bokeh
- Fast and precise autofocus ensures smooth transitions when shooting video
- Quickly switch between autofocus and manual focus
- Creates a widescreen 2.4:1 cinematic ratio without cropping the image
- Produces an oval bokeh and a vertical background stretch
- With blue anamorphic flares
- Lightweight design makes it easy to carry and change lenses quickly
- Compatible with Nikon cameras
Anamorphic display and wide format
The lens works with a constant 1.33× squeeze factor, which compresses the captured scene horizontally. When subsequently de-squeezed in post-production, you get a widescreen 2.4:1 aspect ratio without needing to crop the top and bottom of the shot. This process preserves the full sensor resolution and brings a cinematic perspective to your video footage.
Aperture
The fast T1.8 aperture makes it easier to work in poor lighting conditions without needing to significantly increase the ISO sensitivity. The low f-number contributes to the creation of a pronounced oval blur on background light sources. The optical system with this aperture creates a very shallow depth of field, which separates the main subject from the background.
Autofocus with STM motor
The autofocus system uses an STM stepping motor, which exhibits quiet and smooth operation during audio recording. Focusing algorithms track selected subjects and reduce jerkiness during transitions between different distances. The silent focusing drive eliminates distracting noises in the final video soundtrack. The fast and precise focusing provides stable results both for dynamic video shooting and for portrait photography.
Controls
On the body, there is a switch between automatic and manual focus for quick mode changes without needing to enter the camera menu. A mechanical aperture ring lock prevents the set aperture value from shifting accidentally during handling. Users can also take advantage of the programmable FN button, to which selected camera body functions can be assigned.
Variable aperture and focus settings
The aperture ring offers a switch function between smooth operation for video and clicked steps for photography. The identical placement of the gear rings makes it easy to change different focal lengths within a single camera setup. The focusing ring has a dual scale in metres and feet, and its gearing is compatible with follow-focus systems.
Mount:
Nikon Z
Lens type:
Prime
Focal length:
100mm
Aperture:
T1.8
Maximum aperture:
22
Minimum focusing distance:
70.4cm
Filter diameter:
67mm
Weight:
0.716kg
Durability:
Dust and moisture resistant
Specifications
Bayonet
Features
Functions
Dimensions
Weight
Specifications can be changed without notice. Images are for illustrative purposes only.
