SIRUI Astra Series 50mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Neutral Flare)
SIRUI Astra Series 50mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Neutral Flare)
The SIRUI Astra Series 50mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Neutral Flare) is used for shooting video footage with an anamorphic effect on mirrorless cameras with a Leica L mount. This 50mm fixed-focal-length optical instrument covers both Full Frame and APS-C sensors. The 1.33× squeeze factor design creates a widescreen 2.4:1 cinematic aspect ratio without the need to crop the image and lose resolution. The minimum focusing distance is 50.3cm. The T1.8 aperture makes it easier to work in low-light conditions and helps to separate the subject from the background using a shallow depth of field.
Key Features of the SIRUI Astra Series 50mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Neutral Flare)
- A 1.33× squeeze factor design creates a 2.4:1 widescreen image format
- The T1.8 aperture makes it easier to shoot in low light
- The metal body has integrated seals to prevent dust and rain ingress
- An optional aperture mode offers smooth, click-free operation
- The focus ring position is unified with other lenses in the series
- The lens supports fast focusing with a quiet STM motor
- Compatible with Panasonic cameras
Optical Properties and Consistent Rendering
The optical system with an aspherical element suppresses distortion and maintains high sharpness across the entire frame. The lens generates neutral flares without a colour cast and creates an oval-shaped light bokeh along with vertical background blur. The T1.8 aperture makes it easier to work in low-light conditions and helps separate the subject from the background. The colour rendering and image toning match other focal lengths from the same product line. The unified look of shots simplifies subsequent post-production and colour-matching of videos from different focal lengths. Support for both Full Frame and APS-C sensors expands its usability on different types of cameras. The similar weight and dimensions of the individual lenses in the set make for quick changes on stabilisers without the need for rebalancing.
Autofocus and Controls
The focus drive uses a quiet STM stepping motor, which responds quickly and smoothly when shooting dynamic scenes and portraits. The autofocus system reduces noise and prevents interference with the video's audio track. Users can switch between automatic and manual modes using a dedicated switch on the barrel. The body includes a programmable FN button to assign selected functions and an Iris Range Lock. The aperture mechanism offers a switchable operation with either a smooth or clicking mode for precise exposure adjustment. Dual scales in metres and feet facilitate manual focusing and collaboration with LiDAR systems.
Durable Body of the SIRUI Astra Series 50mm Lens
The construction includes sealing elements at critical points to prevent debris from entering the internal parts. Triple protection shields the optics from dust, moisture, dirt, and splashing water in adverse weather. The metal Leica L mount provides a firm connection to the body of compatible cameras. The all-metal construction increases overall durability for daily use in the field. The unified placement of the gear rings facilitates quick changes within the set without needing to readjust the follow focus. The front thread has a diameter of 67mm for installing standard filters, while the outer diameter of the front section is 72mm.
Mount:
Leica L
Camera Type:
Mirrorless
Compatible Camera Brands:
Panasonic
For Sensor:
APS-C, Full Frame
Lens Type:
Prime Lens
Focal Length:
50mm
Aperture:
T1.8
Filter Diameter:
67mm
Minimum Focusing Distance:
50.3cm
Specifications
Bayonet
Features
Functions
Dimensions
Weight
| Code: | SUR1h4 |
| Warranty: | 36 months |
| Links: | Producer's Website: |