Sirui Astra AF 75mm T1.8 1.33x Full-Frame Anamorphic Lens

Sirui Astra AF 75mm T1.8 1.33x Full-Frame Anamorphic Lens

In The Box

• Sirui Astra AF 75mm T1.8 1.33x Full-Frame Anamorphic Lens
• Lens Cap
• Lens Cleaning Cloth
• Carrying Bag

Sirui Astra AF 75mm T1.8 1.33x Full-Frame Anamorphic Lens

The Sirui Astra 75 mm T1.8 1.33× Auto-Focus Anamorphic Lens is part of Sirui’s Astra series — a groundbreaking trio of full-frame 1.33× anamorphic primes that combine cinematic character with practical usability. With a constant T1.8 aperture, this lens delivers excellent low-light performance, rich depth of field, and beautifully stretched oval bokeh.

Designed for full-frame mirrorless systems (E-mount, Z-mount, L-mount), the Astra 75 mm covers a 44 mm image circle. Its fast STM autofocus motor enables smooth, silent focusing, while the AF/MF switch, AF lock (FN), iris lock, and click-on/off aperture offer flexible control for both run-and-gun and cine-style workflows.

The lens is built with a durable aluminum-alloy body and features dust, dirt, and raindrop protection, making it robust enough for professional use. It also maintains a 67 mm filter thread for compatibility with common filters. With two flare styles — Blue and Neutral — cinematographers can choose the mood that suits their project.

Key Features

• Full-frame coverage (44 mm image circle)
• 1.33× anamorphic squeeze, delivering ~2.35:1 widescreen on 16:9 sensors
• Constant T1.8 aperture for creative low-light work and shallow depth of field
• Autofocus + Manual Focus with STM motor
• AF/MF switch, FN focus lock, & iris lock to toggle between auto and manual control
• Two flair options: Blue or Neutral
• 18 elements in 13 groups, with cylindrical and aspherical elements (same optical construction as other Astra lenses)
• Minimum focus distance: 0.6 m (1.97 ft) for the 75 mm model
• Max magnification: –0.165 (V), –0.123 (H) per Sirui’s spec sheet
• Field of view (FF): 18.52° (vertical) / 36.9° (horizontal) / 40.37° (diagonal)
• 67 mm filter thread (M67 × 0.75)
• Focus ring rotation: 136°
• Outer diameter: 72 mm
• Length: 131 mm (E-mount) / 133 mm (Z) / 128.9 mm (L)
• Weight: ~650 g (E) / ~666 g (Z) / ~655 g (L)
• Durable body: aluminum alloy + triple protection (dust, dirt, raindrop)

Best Suitable

• Independent and narrative filmmakers looking for an anamorphic “look” but who want autofocus convenience
• Content creators using full-frame mirrorless cameras (Sony E, Nikon Z, L-Mount)
• Solo shooters or small crews who don’t have a separate focus puller
• Projects that benefit from widescreen aspect ratio and cinematic flares (commercials, music videos, short films)
• Low-light shooting situations where T1.8 performance is valuable
• Cinematographers who want consistent look and gear dimensions across a lens set (50/75/100 mm Astra)

FAQ – Sirui Astra AF 75mm T1.8 1.33x Full-Frame Anamorphic Lens

Which sensor formats does the Astra 75mm cover?

It supports full-frame sensors, as part of Sirui’s Astra 1.33× FF anamorphic series.

What mounts does this lens come in?

Available in Sony E, Nikon Z, and L-Mount.

Can I switch between autofocus and manual focus?

Yes, there is an AF/MF switch.

What is the minimum focusing distance?

For the 75 mm version, it’s 0.6 m (1.97 ft).

Does it support de-clicking the aperture?

Yes, it supports click on/off (stepped vs stepless) and has an iris lock.

What flare options are available?

You can choose Blue flare or Neutral flare depending on the cinematic style you want.

How durable is the lens?

Built with aluminum-alloy body and offers triple protection (dust, dirt, raindrop).

Specifications