Key Take-Aways:

The Sirui Astra 75mm T1.8 Anamorphic is an autofocus full-frame anamorphic cine prime, the middle lens of Sirui’s Astra set of 50, 75 and 100mm lenses, sold in L, E and Z mounts with a blue or a neutral flare option. In L-Mount it weighs 655 g without lens cap, is 129 mm long and 80 mm across at the widest, with a 67 mm filter thread, a 0.6 m minimum focus distance, 13 aperture blades and a T1.8 to T22 aperture range; Sirui lists it as dustproof, dirt-resistant and raindrop-resistant. Sirui’s US store lists the single lens in L-Mount at $849. As of Oct 2026, few reviews have been written and four videos are linked, each covering more than one lens of the set. Josh & Chris Adrift used the 75mm for tighter portrait work and found the subject separation amazing, with colors matching the 50mm. Bobby Tonelli, comparing it with a full-frame 85mm lens, says the 75mm autofocus is all right, while he found the 100mm pulsating, and calls the set entry-level anamorphic without a distinct character. Future Shock Studios, testing the Sony E-mount version, calls the 75mm a sweet spot with natural-looking faces and nicely stretched backgrounds, and recommends the set. HelloVSTV calls the 75mm his personal favorite for interviews and portraits, praising its natural perspective and background separation.

From Sirui:

Most mirrorless cameras shoot in 16:9. With a 1.33x squeeze rratio, this lens directly restores the classic 2.4:1 widescreen cinematic look-no cropping, no pixel loss, delivering a high-resolution! Immersive image.

Fast, precise, and smooth autofocus system – Provides stable and fluid focusing for both dynamic video shooting and portrait creation.

Use this T1.8 fast aperture lens to capture images featuring clear subject, soft bokeh and shallow depth of field.

Three focal lengths with similar sizes, and a weight of only about 600g-700g, making them portable and easy to switch quickly.

Two classic flares highlight the lens’ signature anamorphic character, revealing a distinctive cinematic.

Uniform color and tone across three focal lengths, enabling fast swapping and easier post-production.

Aspherical lens helps to reduce lens size and also show outstanding optical performance with sharpness and well-controlled distortion.

Dustproof, Dirt-Resistant, Raindrop-Resistant

67mm filter thread and 72mm outer diameter, compatible with commonly used filters.

Official Website

Specifications are from the spec table on Sirui’s page for the Astra set, which has one column per focal length and gives weight and length per mount; the L-Mount figures are used (weight excludes the lens cap; length is 128.9 mm rounded to 129 mm). Sirui publishes one set of figures for all mounts for the filter thread, minimum focus distance, aperture range and maximum magnification. Diameter is the 80 mm maximum diameter that Sirui gives for the E and L mount versions (the focus ring; the outer diameter is 72 mm). Maximum magnification is the larger, vertical figure (0.165; the horizontal figure is 0.123). The angle of view is Sirui’s 40.37 degree diagonal figure, rounded to 40. Weather sealing is entered because Sirui’s page lists dustproof, dirt-resistant and raindrop-resistant protection. The price is the single-lens L-Mount price in Sirui’s US store, with no crossed-out price; an archived copy of the page from 17 Dec 2025 shows the same $849, and the page also sells the three lenses as a $2,549 set. The page sells the lens with a blue or a neutral flare at the same price. The product image is Sirui’s picture of the 75mm lens, with the mount not specified.

YouTube:

• Josh & Chris Adrift: Anamorphic Autofocus - Sirui Astra Series Full Frame Lens Review, Jan 2026
• Bobby Tonelli: Do You Actually Need Anamorphic Lenses? Here’s What I Found, Jan 2026
• Future Shock Studios: SIRUI Astra 75mm & 100mm T1.8 Review | Full-Frame Anamorphic Lenses?!, Mar 2026
• HelloVSTV: SIRUI Astra AF 50mm 75mm 100mm T1.8 - World’s First AF Anamorphic Lenses, Jul 2026