Sirui Astra AF T1.8 1.33x Full-Frame Anamorphic Lens Kit
In The Box
- Sirui Astra AF T1.8 1.33x Full-Frame Anamorphic Lens Kit
- Safety Case
- Lens Cap
- Lens Cleaning Cloth
Sirui Astra AF T1.8 1.33x Full-Frame Anamorphic Lens Kit
The Sirui Astra AF 1.33× Full-Frame Anamorphic Lens Kit is a premium cine lens set designed to give filmmakers a complete, cinematic toolkit. It includes three fully matched, autofocus anamorphic primes — 50 mm, 75 mm, and 100 mm — all with a constant T1.8 aperture and 1.33× squeeze. This combination lets you shoot with a consistent look across wide, standard, and telephoto focal lengths, all while preserving the classic anamorphic 2.35:1 aspect ratio (on 16:9 sensors).
This kit is particularly powerful for narrative productions, short films, commercials, or any project where cohesive visual style matters. The lenses are built with durable aluminum alloy bodies and feature dust, dirt, and raindrop protection, making them reliable on set. Each lens uses a silent STM autofocus motor and supports full manual override with an AF/MF switch, AF lock (FN), iris lock, and selectable clicked or de-clicked aperture. The kit comes in a robust safety case, making it ideal for transport and professional environments.
Key Features
- Complete 3-lens kit: 50 mm, 75 mm, and 100 mm anamorphic primes.
- Constant T1.8 aperture across all focal lengths for low-light performance and consistent exposure.
- 1.33× anamorphic squeeze for cinematic 2.35:1 aspect ratio (on 16:9).
- Autofocus + Manual Focus via STM motor with AF/MF switch.
- AF lock (FN) button and Iris lock for professional control.
- Selectable click / de-click aperture, useful for both video and still workflows.
- Blue or Neutral flare versions for creative lighting style.
- Matched optical design across the three lenses: 18 elements in ~13–14 groups (cylindrical/aspherical).
- Focus throw: 136° rotation on all lenses.
- Filter thread: 67 mm (M67 × 0.75) on all lenses.
- Durable build: aluminum alloy, weather-resistant (dust, dirt, raindrop).
- Comprehensive kit packaging: includes a safety case, lens caps, cleaning cloth, warranty card, and custom cut foam.
Best Suitable
- Narrative filmmakers & indie directors who need a cohesive anamorphic lens set
- Cinematographers who want consistent look & color across multiple focal lengths
- Solo shooters and run-and-gun creators who benefit from autofocus
- Commercial and music video production
- Productions using full-frame mirrorless cameras (Sony E, Nikon Z, L-Mount — as supported by Astra line)
- Workshops or rental houses looking to offer a full anamorphic kit
FAQ – Sirui Astra AF T1.8 1.33x Full-Frame Anamorphic Lens Kit
What focal lengths are included in the kit?
The kit includes 50 mm, 75 mm, and 100 mm Astra autofocus anamorphic lenses.
Do all lenses in the kit have the same maximum aperture?
Yes, all three lenses are T1.8 – T22.
Can I use autofocus or do I need to manual focus?
You can do both. The lenses have a STM autofocus motor, plus a switch for manual focus, plus AF lock (FN).
Are these lenses weather-sealed?
They are built with aluminum alloy and have protection against dust, dirt, and raindrops.
What kind of flares do these lenses produce?
There are Blue flare and Neutral flare versions, depending on the kit or the specific version you choose.
Specifications
| Specification |
50 mm |
75 mm |
100 mm |
| Format Coverage |
Full Frame (44 mm image circle) |
Full Frame (44 mm image circle) |
Full Frame (44 mm image circle) |
| Aperture Range |
T1.8 – T22 |
T1.8 – T22 |
T1.8 – T22 |
| Lens Structure |
18 elements in 14 groups (includes cylindrical/aspherical) :contentReference[oaicite:24]{index=24} |
18 elements in 13 groups (includes cylindrical/aspherical) :contentReference[oaicite:25]{index=25} |
18 elements in 13 groups (includes cylindrical) :contentReference[oaicite:26]{index=26} |
| Aperture Blades |
11 |
13 |
13 |
| Minimum Focus Distance |
0.5 m |
0.6 m |
0.7 m |
| Focus Method |
AF (STM) / MF |
AF (STM) / MF |
AF (STM) / MF |
| Max Magnification |
1:7.2 (V) / 1:10.2 (H) |
-0.165 (V) / -0.123 (H) |
1:7.5 (V) / 1:10.0 (H) |
| Field of View (FF) |
27.8° (V) / 56.8° (H) / 60.9° (D) |
18.52° (V) / 36.9° (H) / 40.37° (D) |
18.4° (V) / 27.4° (H) / 32.3° (D) |
| Filter Thread |
M67 × 0.75 mm |
M67 × 0.75 mm |
M67 × 0.75 mm |
| Focus Ring Rotation Angle |
136° |
136° |
136° |
| Maximum Diameter |
φ80 mm |
φ80 mm |
φ80 mm |
| Outer Diameter |
72 mm |
72 mm |
72 mm |
| Length (Exclude Cap) |
E: 131 mm / Z: 133 mm / L: 128.9 mm |
E: 131 mm / Z: 133 mm / L: 128.9 mm |
E: 135.3 mm / Z: 137.3 mm / L: 133.2 mm |
| Weight |
E: ~620 g / Z: ~636 g / L: ~625 g |
E: ~650 g / Z: ~666 g / L: ~655 g |
E: ~700 g / Z: ~716 g / L: ~705 g |
| Squeeze Factor |
1.33× |
| Flare Style |
Blue or Neutral |
| Protection |
Dust, Dirt, Raindrop Resistant |
