Astra Series
1.33x Full Frame Auto Focus Anamorphic Cine Lens
50 / 75 / 100mm T1.8
The world's first
full frame auto focus anamorphic cine lens
Stories come alive in anamorphic
Astra Series with three focal lengths
From vast imagery to widescreen world
Stories come alive in anamorphic
Astra Series with three focal lengths
From vast imagery to widescreen world
Full Frame
Auto Focus
1.33x
Constant Squeeze Ratio
T1.8
Fast Aperture
620g
(50mm E Mount)
Flare
Blue/Neutral
Mount
E / L / Z
Consistent in A Set
The World's First
Full Frame Auto Focus Anamorphic Cine Lens
From pioneering lightweight anamorphic lenses to launching the first full-frame autofocus, SIRUI once again pushes high-end technology further. The Astra Series—50mm, 75mm, 100mm—combines compact design with outstanding anamorphic look and efficient workflow.
Length 131mm
Weight 620g
(50mm E mount)
(50mm E mount)
Full Frame Anamorphic
T1.8 Fast Aperture
Auto Focus
Aluminum Alloy
44mm image circle fully covers full-frame sensors, compatible with mirrorless systems, and ready for professional cinematic production.
APS-C
SUPER 35
Full Frame
Solo-Ready Auto Focus
Traditional full frame anamorphic lenses rely on manual focus, which limits efficiency and requires large crews, typically for professional film teams. SIRUI Astra Series introduces fast and precise autofocus, eliminating the need for a focus puller. This significantly increases shooting efficiency, enabling solo operators or small teams to shoot professional cinema with ease.
AF / MF Switch
Switch to manual focus for precise, controllable shots.
Constant 1.33x Squeeze Ratio
Most mirrorless cameras shoot in 16:9. With a constant 1.33x squeeze ratio, this lens directly restores the classic 2.35:1 widescreen cinematic look—no cropping, no pixel loss, delivering a high-resolution, immersive image.
Oval bokeh and vertical background stretch bring classic cinematic artistry to life.
Shine in the Dark with T1.8
Provides ample light even in low-light or night scenes for high-quality and clean images. The shallow depth of field creates soft bokeh and natural subject separation, guiding the viewer's focus with ease.
· Unique Backlight Flare
Two classic flares (blue flare and neutral flare) highlight the len' signature anamorphic character, revealing a distinctive cinematic look.
· Outstanding Close-Up Performance
Easily capture portraits and vivid close-ups with rich detail. T1.8 fast aperture adds depth, texture and atmosphere.
50mm｜Minimum Focus Distance: 0.5m
Crafted to Perfection
67mm Filter Thread
Dual Scale--Feet/Meter
72mm Outer Diameter
Triple Protection
(Dustproof, Dirt-Resistant, Raindrop-Resistant)
(Dustproof, Dirt-Resistant, Raindrop-Resistant)
Identical Gear Position
E / L / Z Mount
AF / MF
Switch between auto focus and manual focus
Switch between auto focus and manual focus
FN
Auto focus lock/customization
Auto focus lock/customization
IRIS LOCK
Lock at "A" for auto aperture, or switch for manual aperture control
Lock at "A" for auto aperture, or switch for manual aperture control
CLICK ON / OFF
Stepped aperture/stepless aperture
Stepped aperture/stepless aperture
Three-Year Replacement, Lifetime Warranty
Free replacement within 3 years for non-human damage (with valid proof of purchase). Lifetime paid repair service available for human-caused damage.
*Warranty above is valid only for products purchased from official SIRUI stores or authorized dealers. Please refer to the warranty card for details.
PERKS
Packing List
Lens Only
1. Lens
2. Packaging Box
3. Carrying Bag
4. Lens Cap
5. Lens Cleaning Cloth
6. Warranty Card
Kit
1. Lens * 3
2. Safety Case
3. Lens Cap
4. Lens Cleaning Cloth
5. Warranty Card
Specifications
Lens
Format Coverage
Full Frame
Full Frame
Full Frame
Focal Length
50mm
75mm
100mm
Aperture
T1.8-T22
T1.8-T22
T1.8-T22
Lens Structure
18 Elements in 14 Groups (4 Cylindrical Lenses and 1 Aspherical Lens)
18 Elements in 13 Groups (4 Cylindrical Lenses and 1 Aspherical Lens)
18 Elements in 13 Groups (5 Cylindrical Lenses)
Aperture Blade
11
13
13
Shooting Distance
0.5M(1.64ft)～∞
0.6M(1.97ft)～∞
0.7M(2.3ft)～∞
Focus Method
MF / AF
MF / AF
MF / AF
Max Magnification
1：7.2(V）
1：10.2（H)
1：10.2（H)
-0.165(V）
-0.123（H)
-0.123（H)
1：7.5(V）
1：10.0（H)
1：10.0（H)
FOV (Full Frame)
27.8°(V)
56.8°(H)
60.9°(D)
56.8°(H)
60.9°(D)
18.52°(V)
36.9°(H)
40.37°(D)
36.9°(H)
40.37°(D)
18.4°(V)
27.4°(H)
32.3°(D)
27.4°(H)
32.3°(D)
Filter Size
M67*P0.75
M67*P0.75
M67*P0.75
Focus Ring Rotation Angle
136°
136°
136°
Max Diameter
Φ80mm / 3.15inch
(E/Z/L Mount)
(E/Z/L Mount)
Φ80mm / 3.15inch
(E/Z/L Mount)
(E/Z/L Mount)
Φ80mm / 3.15inch
(E/Z/L Mount)
(E/Z/L Mount)
Focus Ring Diameter
Φ80mm / 3.15inch
Φ80mm / 3.15inch
Φ80mm / 3.15inch
Aperture Ring Diameter
Φ75.2mm / 2.96inch
Φ75.2mm / 2.96inch
Φ75.2mm / 2.96inch
Outer Diameter
φ72mm
φ72mm
φ72mm
Focus Motor
STM
STM
STM
Length
(Exclude Lens Cap)
(Exclude Lens Cap)
E Mount: 131mm / 5.16inch
Z Mount: 133mm / 5.24inch
L Mount: 128.9mm / 5.07inch
Z Mount: 133mm / 5.24inch
L Mount: 128.9mm / 5.07inch
E Mount: 131mm / 5.16inch
Z Mount: 133mm / 5.24inch
L Mount: 128.9mm / 5.07inch
Z Mount: 133mm / 5.24inch
L Mount: 128.9mm / 5.07inch
E Mount: 135.3mm / 5.33inch
Z Mount: 137.3mm / 5.41inch
L Mount: 133.2mm / 5.24inch
Z Mount: 137.3mm / 5.41inch
L Mount: 133.2mm / 5.24inch
Weight
(Exclude Lens Cap)
(Exclude Lens Cap)
E Mount: 620g / 1.37lb
Z Mount: 636g / 1.4lb
L Mount: 625g / 1.38lb
Z Mount: 636g / 1.4lb
L Mount: 625g / 1.38lb
E Mount: 650g / 1.43lb
Z Mount: 666g / 1.47lb
L Mount: 655g / 1.44lb
Z Mount: 666g / 1.47lb
L Mount: 655g / 1.44lb
E Mount: 700g / 1.54lb
Z Mount: 716g / 1.58lb
L Mount: 705g / 1.55lb
Z Mount: 716g / 1.58lb
L Mount: 705g / 1.55lb
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