After extensive real-world testing, it quickly becomes clear why opinions on the SIRUI Astra vary so widely. Those coming from old, vintage-style anamorphic glass may find the Astra a little too clean and modern. Those coming from spherical lenses, on the other hand, will find in the Astra exactly the anamorphic character they expect—flares, squeeze, and an unmistakable cinematic look, simply packaged in a more corrected, contemporary form.
The Astra is a full-frame autofocus anamorphic lens with 1.33x squeeze, and it stands out primarily because autofocus-capable anamorphic lenses remain rare on the market. Below is a closer look at how the lens performs in practice.
How well does the Astra’s autofocus work in real-world shooting?
Autofocus is this lens’s key feature—the main reason filmmakers would choose an autofocus anamorphic lens in the first place. Tested on a Sony A7S III, the Astra’s autofocus proved practical and stable, particularly with the latest firmware update.
However, its performance is not flawless. In low light with wide-area autofocus enabled, there were some hesitations and brief dropouts. Some of this is more attributable to the lighting conditions than to the lens itself, but it is a useful point for anyone planning to shoot in dark environments.
Does the built-in image stabilization actually work with the Astra?
Traditionally, in-body image stabilization (IBIS) is not recommended with anamorphic lenses—outside of Lumix cameras, it usually causes distortion and visible artifacts. The current Astra firmware appears to change that. In handheld tests without a rig or gimbal, the footage showed neither distortion nor visible artifacts—a noticeable improvement for handheld shooting.
What about focus breathing on the Astra?
The Astra does exhibit some focus breathing, but this is typical of anamorphic lenses as a category and is not a specific weakness of this model. It is best understood as part of the overall anamorphic package.
Do you need a larger monitor for the Astra?
There is one important limitation for Sony users: cameras such as the FX3 and FX30 can desqueeze anamorphic footage directly in-camera, but they currently disable the Astra’s autofocus when doing so. In practice, monitoring with an external monitor is therefore recommended.
Because anamorphic footage is squeezed and displayed with black bars before desqueezing, only a narrow strip of the image is visible on a small display. A larger 6- or 7-inch external monitor makes a real difference when judging focus and framing during a shoot.
What does the Astra’s anamorphic character actually look like?
As a 1.33x anamorphic lens, the Astra produces a subtler squeeze and a gentler anamorphic look than lenses with a stronger ratio. The typical characteristics—flares, distortion, and squeeze—are still present, simply in a more restrained form.
SIRUI consistently uses pincushion distortion throughout its anamorphic range, and the Astra is no exception. Straight lines near the edge of the frame—architectural edges, wall panels, and trim—show a slight inward curvature, characteristic of pincushion distortion, the opposite of barrel distortion (outward bulging) found in some competing anamorphic lenses. Neither variant is objectively “better”—the choice ultimately comes down to taste and the desired look. Distortion can always be corrected in post-production if a shot appears too distorted, although retaining some of it helps preserve a recognizable anamorphic visual language.
Distortion at the edge of the frame is also minimal on the Astra, which matters more than it may initially seem—because the entire full-frame image is used rather than cropped to the classic anamorphic aspect ratio, edge performance is especially apparent during pans. Lenses with a pronounced “fisheye” effect at the edges can be distracting during pans; the Astra performs well in this regard.
How do the Astra’s flares look?
The Astra is available with classic blue flares or a neutral flare option. The version with blue flares was tested, and the result feels well balanced—not overly dramatic or streaky, but complementary to the lens’s overall look rather than working against it. If there is one criticism, it is that the flares lean more blue than turquoise, though this is more of a stylistic footnote than a genuine weakness.
How does the Astra compare with the Blazar Talon in rendering and bokeh?
Anamorphic character is not limited to flares—the look is also apparent in how a lens renders depth, subject separation, and bokeh. The Astra looks clean and modern; much of its subject separation comes from the fast T1.8 aperture rather than strong optical distortion.
A direct comparison with the Blazar Talon at the same aperture makes the difference in optical philosophy clear. The Talon’s additional optical distortion creates the classic elongated, oval bokeh balls associated with vintage anamorphic lenses. The Astra, by contrast, produces rounder, more neutral bokeh shapes that only begin to show slight elongation toward the edges of the frame during pans.
The conclusion: The Astra has a significantly more corrected and modern look than the Talon, for example, but the test footage still feels cinematic rather than clinical or “tack-sharp.”
Does the build quality meet expectations for a cinema lens?
Yes—the Astra has an aluminum body and retains geared rings for aperture and focus, along with the overall form of a classic cinema lens, despite being autofocus-capable. Hard stops on the focus ring allow it to be used with a conventional follow-focus system, just like any manual cinema lens. It also features a 67 mm front filter thread. Overall, it is a functional, versatile design suitable for both autofocus-assisted run-and-gun filming and fully equipped manual setups.
Is chromatic aberration a problem with the Astra?
Not really. Some chromatic aberration at wide apertures is normal and expected with anamorphic lenses, but it remains minimal on the Astra, reinforcing the lens’s clean, sharp, and contrasty overall impression.
Who is the SIRUI Astra really for?
The Astra occupies an interesting niche. Many clients and productions cannot or do not want a strong, obvious anamorphic look—explaining the quirks of an anamorphic lens to a client can quickly feel more like a physics lesson than a creative pitch. That is where the Astra comes in: it works almost like a “stealth anamorphic,” adding cinematic flair and production value without appearing overly stylized.
For anamorphic enthusiasts, it is also a strong middle ground for projects that might otherwise have been shot with spherical glass but call for a somewhat more elevated, modern look. The Astra’s gentler character is not a limitation—it is the whole point.
Suggested image: Screenshot of a finished example around 9:00–9:56 (a clearly cinematic sample frame), selecting 1–2 shots that best convey the atmosphere of a “stealth anamorphic widescreen” look.
Conclusion
The SIRUI Astra clearly deserves a recommendation, particularly the 50 mm model, which is the best starting focal length for anyone who wants to begin with a single lens. Anamorphic purists seeking heavy vintage distortion and oval bokeh will not be completely satisfied. For filmmakers looking for usable autofocus, clean modern rendering, and just enough anamorphic character to add production value, however, it is a compelling choice.
