Laowa Venus Optics Laowa Proteus Flex 2x Anamorphic 20mm Review
The Laowa Proteus Flex 20mm packs anamorphic cinema magic into a compact design with clever swappable flares, but its T2 aperture and niche use case make it a tool for very specific filmmakers.
The 30-Second Version
The Laowa Proteus Flex 20mm is a compact, clever anamorphic cinema lens for dedicated filmmakers. Its swappable flare modules are a unique creative tool. At $10,000, it's a specialist's purchase, offering great optics but a slow T2 aperture and Super35-only coverage. Only buy this if you're specifically building a kit for widescreen cinematic projects and can control your lighting.
Overview
So you're looking at a $10,000 piece of glass. That's not a typo. The Laowa Proteus Flex 20mm is a specialized anamorphic cinema lens, and it's not for your YouTube vlog. This is a tool for filmmakers who want that classic widescreen, cinematic look with horizontal lens flares and oval bokeh, all in a surprisingly compact package for an anamorphic design. What makes it interesting is the 'Flex' part. It comes with four different, user-swappable flare modules (amber, blue, clear, and silver) that let you change the character of the lens flare without swapping the entire lens. That's a clever trick for a DP who needs to switch looks quickly on set.
Performance
Let's talk about the numbers. The optical quality is in the 95th percentile, which is what you'd expect for a lens at this price. It's sharp, controlled, and built to deliver a clean, high-resolution image for 4K and 8K cinema cameras. The trade-off for that compact size and anamorphic magic is speed. With a T2 maximum aperture, it lands in the 29th percentile for aperture. That means it's not a low-light monster compared to, say, a T1.5 spherical prime. You'll need good lighting or a sensor that performs well at higher ISOs. The 300-degree focus rotation is a cinema standard, giving a focus puller incredibly fine control for precise rack focuses.
Pros & Cons
Pros
- Interchangeable flare modules (amber, blue, clear, silver) offer incredible creative flexibility on set. 95th
- Compact and relatively lightweight (2500g) for a 2x anamorphic lens, making rigging and handheld work easier.
- Excellent optical quality (95th percentile) ensures sharp, high-resolution performance for modern cinema cameras.
- Includes both ARRI PL and Canon EF mounts, offering immediate compatibility with two major professional systems.
- True 2x anamorphic squeeze delivers the authentic widescreen cinematic look with oval bokeh.
Cons
- Maximum aperture of T2 is relatively slow (29th percentile), limiting low-light capability. 7th
- Build quality percentile is low (8th), which may be a concern for heavy-duty, run-and-gun filmmaking. 30th
- No autofocus or image stabilization, which is standard for cinema lenses but a dealbreaker for solo shooters.
- Massive 105mm front filter thread means your existing filter kit is probably useless.
- Super35/APS-C sensor coverage only; it won't work on full-frame cinema cameras without cropping.
Specifications
Full Specifications
Optics
| Focal Length Min | 20 |
| Focal Length Max | 20 |
| Elements | 17 |
| Groups | 15 |
Aperture
| Diaphragm Blades | 10 |
Build
| Mount | Interchangeable Mount with Included ARRI PL/Canon EF |
| Format | Super35/APS-C (25.9 x 21.6 mm Sensor) |
| Weight | 2.5 kg / 5.5 lbs |
| Filter Thread | 105 |
AF & Stabilization
| Stabilization | No |
Focus
| Min Focus Distance | 480 |
Value & Pricing
At $9,999, the value proposition is entirely about specialization. You're not paying for versatility; you're paying for a specific, high-quality anamorphic look in a wide focal length. Compared to renting anamorphic primes, which can cost over $1,000 per day, this lens pays for itself after a few weeks of a typical shoot. However, against other purchased cinema lenses, it's a niche player. You could buy a set of three excellent spherical cinema primes for this price. So the value is only there if the anamorphic look is non-negotiable for your project.
Price History
vs Competition
The competitors listed in our database—like the Meike 55mm or Viltrox 35mm—aren't even in the same league. They're budget stills lenses. A real competitor would be something like the Sirui Saturn 35mm T2.9 1.6x anamorphic, which is much cheaper but offers a different squeeze factor and is slower. For a more direct comparison, look at used Cooke or ARRI Master Anamorphic primes on the rental market. The trade-off is clear: the Laowa gives you ownership and the unique flare system at a lower entry cost than those legendary brands, but you sacrifice the bullet-proof build quality and pedigree. Another option is pairing a high-quality spherical lens with an anamorphic adapter, but that adds complexity and optical compromises the Proteus avoids.
| Spec | Laowa Venus Optics Laowa Proteus Flex 2x Anamorphic 20mm | Nikon Nikon S-Line Nikon NIKKOR Z 24-70mm f/2.8 S II Lens (Nikon Z) | Canon Canon RF 24mm f/1.8 Macro IS STM Lens | Tamron Tamron Di III Tamron 17-70mm f/2.8 Di III-A VC RXD Lens for Sony | Meike Meike 55mm F1.8 Pro Full Frame AF STM Lens High | Sirui Sirui Sniper 56mm f/1.2 Autofocus Lens (Sony E, |
|---|---|---|---|---|---|---|
| Focal Length | 20mm | 24-70mm | 24mm | 17-70mm | 55mm | 56mm |
| Max Aperture | — | f/2.8 | f/1.8 | f/2.8 | f/1.8 | f/1.2 |
| Mount | Interchangeable Mount with Included ARRI PL/Canon EF | Nikon Z | Canon RF | Sony E Mount | Sony E | Sony E |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | false | true | false | false | false | false |
| Weight (g) | 2500 | 676 | 269 | 544 | 201 | 422 |
| AF Type | — | Autofocus | Autofocus | Autofocus | STM | Autofocus |
| Lens Type | — | Zoom | Zoom | Zoom | — | — |
Common Questions
Q: Can I use this lens on a full-frame mirrorless camera like the Sony A7S III?
Technically, yes, but not optimally. The lens only covers Super35/APS-C sized sensors. On a full-frame camera, you'd have to crop into the sensor or use a Super35 mode, effectively losing resolution and field of view. It's designed for cinema cameras like the ARRI Alexa Mini or RED Komodo that use that sensor size natively.
Q: How does the interchangeable flare system work? Is it difficult to change?
The flare modules screw into the front of the lens barrel. It's a physical swap that takes a minute. The idea is you can pre-set modules for different scenes—amber for warm daylight, blue for cool night scenes, clear for neutral, and silver for a more intense, metallic look. It's a practical tool for changing the lens character without relensing the camera.
Q: Is the T2 aperture a big limitation?
It depends on your work. For a well-lit studio or exterior day scene, T2 is fine. For available-light night photography or very dark interiors, it's a limitation. You'll need a more sensitive camera or additional lighting. Most premium anamorphics are around T2, so it's standard for the genre, but slower than many spherical cinema primes which can be T1.5 or faster.
Q: Why is the build quality percentile so low (8th)?
Our percentile compares it to all lenses, including bombproof stills lenses. Cinema lenses are judged by extremely rugged standards. At this price, filmmakers expect a tank-like metal housing. The Laowa prioritizes a compact, lighter design, which likely uses more polycarbonate or lighter alloys. It's probably fine for careful set use, but might not survive the same abuse as a $40,000 ARRI lens.
Who Should Skip This
Skip this lens immediately if you're a solo shooter, run-and-gun documentarian, or hybrid photographer. The lack of autofocus and stabilization makes it impractical for anything but a controlled set with a focus puller. Also, if you shoot primarily for social media or 16:9 deliverables, the anamorphic workflow (de-squeezing in post) is an unnecessary hassle. You'd be better served by a fast, autofocus spherical lens like a Sigma Cine prime. Most importantly, if your camera has a full-frame sensor and you want to use all of it, this lens simply won't cover it. Look at full-frame anamorphic options instead, or stick with spherical lenses.
Verdict
For the independent filmmaker or small production house building a kit to shoot a narrative feature or high-end commercial with a distinct anamorphic look, the Laowa Proteus Flex 20mm is a compelling tool. The interchangeable flares are a genuine innovation that saves time and money. If your project lives on a Super35 sensor and you have the lighting package to support a T2 lens, it's a smart buy. For everyone else—documentary shooters, event videographers, or anyone who needs autofocus, stabilization, or full-frame coverage—this lens is a hard pass. It's a scalpel, not a Swiss Army knife.