SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Blue Flare)
SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Blue Flare)
The SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Blue Flare) captures video and photos with an anamorphic effect on mirrorless cameras with a Leica L mount. This 75mm prime optical tool offers a constant 1.33× squeeze factor to achieve a wide-screen 2.4:1 cinematic aspect ratio without needing to crop the image. 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. The design includes aspherical optical elements that suppress distortion and maintain high sharpness across the entire frame. Triple protection shields the internal components from rain, dust, and dirt in adverse weather.
Key Features of the SIRUI Astra Series 75mm T1.8 1.33X Full-frame Anamorphic Cine Lens (L Mount, Blue Flare)
- The 1.33× squeeze factor creates a wide-screen image with a 2.4:1 aspect ratio
- The T1.8 aperture makes it easier to shoot in poor lighting conditions
- Focusing uses a silent STM stepping motor
- The all-metal body provides triple protection against dust and moisture ingress
- The aperture ring offers a switch between smooth operation and clicked positions
- A lock firmly holds the selected aperture value in the chosen position
- Compatible with Panasonic cameras
Cinematic Aspect Ratio
The sensors of standard mirrorless cameras operate with a 16:9 aspect ratio. This optical element, with its constant 1.33× squeeze factor, changes the final recording to a 2.4:1 wide-screen format without the loss of resolution caused by cropping. It creates the typical oval bokeh in the background and a vertical stretching of out-of-focus areas. The lens produces distinct blue horizontal flares that give the scene a characteristic look.
T1.8 Aperture in Practice
The fast T1.8 aperture expands the possibilities for shooting in low light without needing to significantly increase the sensor's sensitivity. The aperture helps control the depth of field and the separation of the main subject. The low aperture number makes it easier to work in the dark and encourages the creation of a blurred background. The minimum focusing distance is 60.2cm from the sensor plane.
Autofocus
The focusing system uses an STM stepping motor for fast and quiet operation when tracking subjects. Smooth focus transitions meet the demands of video production and minimise distracting sounds in the recording. The stepping motor supports smooth tracking of dynamic scenes and makes creating portraits easier. Switching between automatic and manual modes is done using a dedicated switch directly on the body.
Physical Aperture Control
The aperture ring offers a choice between smooth, clickless operation and a mode with tactile feedback. The clickless setting eliminates unwanted noise and exposure jumps during video recording. A mechanical aperture lock prevents accidental changes to the set values while handling the equipment. The aperture scale covers a range from T1.8 to T22.
Function Buttons and Locks
The lens barrel features a customisable FN button, to which you can assign selected functions in the camera's menu to increase work efficiency. A dual focus scale in metres and feet makes orientation easier during manual focusing. The identical placement of the geared rings simplifies lens changes within a set without needing to readjust the follow focus. The front thread accommodates standard 67mm filters.
Mount:
Leica L
Lens Type:
Prime Lens
Focal Length:
75mm
Aperture:
T1.8
Filter Diameter:
67mm
Minimum Focusing Distance:
60.2cm
Weight:
0.655kg
Specifications
Bayonet
Features
Functions
Dimensions
Weight
Specifications can be changed without notice. Images are for illustrative purposes only.
