SIRUI FFEK6-E 50mm T2.9 1.6X Anamorphic Lens Review: 2.8:1 Aspect Ratio on 16:9 Sensors

What the SIRUI FFEK6-E Is, and Who For

SIRUI FFEK6-E 50mm T2.9 1.6X Anamorphic Lens captures a wide architectural shot with a 2.9 f-stop aperture for shooters requiring an anamorphic look on an E Mount camera.

Anamorphic glass creates a 2.8:1 aspect ratio on a 16:9 sensor, producing a wide cinematic field of view that standard spherical lenses cannot replicate. This specific horizontal squeeze allows for the signature oval bokeh and horizontal sci-fi reflections that define the look of high-end motion pictures.

The SIRUI FFEK6-E 50mm 1.6X Anamorphic Lens achieves these results through a 16-element, 13-group optical construction. It weighs 1073.6g, providing a substantial build that balances the weight of the 50mm glass and the internal 1.6x squeeze mechanism.

We evaluated 51 cinema lenses and selected 15 for full review based on the highest buyer ratings that pass screening. This product was chosen because it has 84 buyer ratings, the 6th most of the 51 screened. Our comparison is based on a research-driven analysis of listing data.

The Short Answer on the SIRUI FFEK6-E

Best for: You need a budget-friendly anamorphic lens to achieve a 1.6x squeeze for indie projects without the cost of high-end cinema glass.

The SIRUI FFEK6-E is a practical choice for these requirements at the $300 mark.

• Pro: The 1.6x squeeze factor provides a distinct cinematic look for anamorphic cinematography.
• Pro: A 4.5 rating from 84 buyers indicates a reliable experience for the price point.
• Con: The T2.9 maximum aperture limits performance in low-light indie scenes where a T1.4 or T2.0 is typically required.
• Con: The 1073.6g weight makes it heavier than many standard prime lenses for mobile setups.

Don’t buy this if: You need to shoot a cinematic portrait with a blurry background, as the T2.9 aperture is not wide enough to achieve the required 1.2 to 2.8 f-stop range.

Price assessment: At $300, this lens offers a low-cost entry point into anamorphic glass with a 1.6x squeeze factor.

Filmmakers using the RED Komodo should see our best cinema lens for red komodo guide to find the ideal glass for that specific body.

The Numbers on the Spec Sheet

The 1.6 times squeeze factor measures the ratio of the horizontal field of view to the vertical field of view.

Before You Buy: Cine Lens Checklist

The first thing to check is the Sony E Mount compatibility to ensure the lens physically attaches to your camera body.

• ✓ Confirm the Sony E Mount—failure to match the mount means the lens will not attach to your camera.
• ✓ Verify the 1073.6g (2.37lbs) weight—this weight may cause front-heavy balance issues on a small mirrorless camera setup if not counterweighted.
• ✓ Check the 50mm focal length—this measurement determines the magnification and angle of view, which may be too narrow for wide-angle vlogging in small rooms.
• ✓ Measure the 142.9mm total length—ensure this length fits your lens grip or cage without hitting other accessories.
• ✓ Verify the T2.9 maximum aperture—this opening is only sufficient for wide-angle vlogging or architectural shots at the easier end of the light range.
• ✓ Assess the 1.6x squeeze factor—this determines the horizontal field of view relative to the vertical, which defines the anamorphic look for your footage.

You should not buy this product if you need to capture a cinematic portrait with a blurry background, as the T2.9 aperture is not wide enough to achieve that specific depth of field.

Practical Performance of this Cinema Lens

How the 1.6x squeeze factor expands the horizontal field of view

The SIRUI FFEK6-E provides a 1.6x squeeze factor, which measures the ratio of the horizontal field of view to the vertical field of view. This squeeze factor functions like a horizontal expansion of the image, allowing you to capture a wider field of view while maintaining the vertical height of the frame.

SIRUI FFEK6-E allows you to capture wide architectural shots or cinematic environments that would otherwise be cut off by a standard lens. Because the squeeze is 1.6x, the 50mm focal length provides a horizontal angle of view equivalent to a 31mm regular lens. This specific value enables you to frame larger scenes while keeping the characteristic oval bokeh and horizontal sci-fi reflections of anamorphic glass.

How the T16-T2.9 variable aperture measures actual light transmission

The T16-T2.9 aperture on the SIRUI FFEK6-E defines the range of light transmission through the glass. A T-stop measures the actual light passing through the lens rather than the theoretical f-stop, which is the standard for professional cinema glass. This range allows you to choose between a wider, deeper focus at T16 or a shallower depth of field at T2.9.

At the T2.9 maximum opening, the SIRUI FFEK6-E supports capturing wide-angle vlogs in a small room or architectural shots at the easier end of the light requirements. However, because T2.9 is wider than the T1.4 to T2.0 range typically required for low-light indie scenes or high-end commercial work, you will need sufficient lighting for those specific tasks. The 10 aperture blades help maintain consistent shapes across the frame as you adjust the opening.

Full frame support prevents vignetting on high-end cinema bodies

Full frame support means the SIRUI FFEK6-E is designed to cover the entire surface area of a full-frame sensor without vignetting or significant distortion. This allows you to use the lens on high-end cinema bodies without losing the edges of your image. The 16 elements in 13 groups are arranged to maintain optical integrity across the larger sensor area.

Using this lens on a full-frame sensor provides the necessary clearance for cinematic portraiture and wide-angle shots. Because the lens supports the full sensor, you do not have to worry about dark corners or “barrel” warping in your wide-angle compositions. This compatibility ensures that the 50mm focal length remains consistent whether you are filming a wide-angle vlog or a more intimate cinematic shot.

Which Jobs the SIRUI FFEK6-E Handles, Worked Out From Its Specs

The SIRUI FFEK6-E against the jobs buyers ask about, worked out from its listed maximum aperture and a typical need for each job.

Where the SIRUI FFEK6-E Sits Among the Alternatives

Comparison to Similar Cinema Lenses

The SIRUI FFEK6-E provides the largest squeeze factor at 1.6 times, which creates a wider anamorphic look than the other options we compared.

• The SIRUI 50mm F1.8 1.33X SR-MEK7E costs $14 cheaper than this model.
• The 7artisans 35mm T1.05 Cine Lens has a smaller T1.05 maximum aperture.
• The SIRUI Mars 1.33x T2 to T2.9 Anamorphic Lens Set is $1 cheaper than the SIRUI FFEK6-E.
• The Meike ZN-1622 16mm T2.2 M43 Cinema Lens is $26.66 more expensive.

If you need a much wider field of view for tight spaces, the Meike ZN-1622 16mm T2.2 M43 Cinema Lens is the better pick.

If you are considering other options, view our full SIRUI 50mm Anamorphic review for a detailed look at its performance.

You might also consider the Meike 50mm T2.1 spec breakdown if you need a high-speed prime for Super 35 sensors.

What features a $300 price point offers for this cinema lens

The SIRUI FFEK6-E sits at the $300 mark, positioned $7 below the $307 average of the similar cinema lens products we compared. At this price point, you gain a 1.6x squeeze factor—the ratio of horizontal to vertical field of view—and a T2.9 maximum aperture. You trade off the wider aperture of higher-end glass, which limits this lens to capturing a wide-angle vlog in a small room where the light is abundant, rather than low-light indie scenes or high-end commercial work.

The SIRUI FFEK6-E is the right buy if you need a 50mm anamorphic lens for a 3:2 or 16:9 sensor and your budget is firm at $300. You should choose this model when your priority is the specific horizontal sci-fi reflections and oval bokeh effects provided by the 16-element optical design.

What It Takes to Run the SIRUI FFEK6-E

Setting Up the SIRUI FFEK6-E

You must have a Sony E mount camera body before the SIRUI FFEK6-E can be used for filming.

1. Unscrew the front cap from the 88mm front diameter and the rear cap from the mount.
2. Attach the lens to the camera body by aligning the mount and rotating until it locks.
3. Thread a lens hood onto the front to protect the front element and manage light.
4. Attach a follow focus system to the barrel to enable smooth, repeatable focus pulls during production.
5. Mount a matte box to the front to block stray light and hold filters.

Warranty and Support: What to Check

Warranty terms and support availability differ by seller and country.

• Confirm the 16 elements in 13 groups are free of internal dust or scratches, as internal optical issues are difficult to service.
• Verify the manual focus ring moves smoothly without grinding, as a seized focus mechanism prevents the lens from performing its primary task.
• Check that the 1.6x squeeze factor produces the expected 2.4:1 or 2.8:1 aspect ratio on your specific sensor, as this is a hardware limitation that cannot be adjusted.

Test the focus throw and check for any optical defects as soon as the package arrives while the return window remains open.

Questions Buyers Ask About This Cinema Lens

Anamorphic Squeeze and Sensor Compatibility

The SIRUI FFEK6-E provides a 1.6x squeeze factor, which is the ratio of the horizontal field of view to the vertical field of view. This specific squeeze results in a 2.8:1 aspect ratio on a 16:9 sensor, allowing you to capture the wide, cinematic look of anamorphic glass without cropping the vertical height of your footage. While many buyers assume anamorphic lenses require specific sensor shapes, this 1.6x squeeze works with standard 16:9 sensors to produce a 2.8:1 image.

Does it work with my current 16:9 sensor without losing too much image?

Yes, the SIRUI FFEK6-E works with a 16:9 sensor to produce a 2.8:1 aspect ratio. Because the 1.6x squeeze factor is designed to expand the horizontal field of view, you can retain the full vertical height of your sensor while achieving a wide cinematic frame.

Is the SIRUI FFEK6-E Right for You?

Who the SIRUI FFEK6-E suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Movie Camera Lens

When we looked in November 2026, the SIRUI FFEK6-E was listed at $300 – a snapshot that may have changed since.

Cinema lenses are sold by the retailers below – we do not track which of them has the SIRUI FFEK6-E in stock, so check availability and the current price with the retailer before making a trip.

• Albert Instruments (online only) — specialist retailer for high-end cinema and specialty optics
• KEH Camera (online only) — reliable source for used and refurbished cinema lenses
• Adorama (online and physical stores) — wide selection of cinema gear and professional trade accounts
• B&H Photo Video (online and physical stores) — wide selection of cinema gear and professional trade accounts
• B&H Photo Video (online and physical stores) — wide selection of cinema gear and professional trade accounts
• Adorama (online and physical stores) — large inventory of cinema accessories and professional support
• Amazon (online only) — high volume of third-party sellers and fast shipping

Final Verdict on the SIRUI FFEK6-E

If you need a cinema lens for a wide-angle vlog in a small room, the SIRUI FFEK6-E provides a T2.9 maximum aperture. This T2.9 value—the widest opening of the lens—is enough for this task only at the easier end of the 2.8 to 4 f-stop range required for indoor vlogging.

You should check the space requirements for your filming location and compare them against the 2.9 f-stop limit. If your room requires a wider opening than 2.9 to maintain a usable exposure, this lens will not provide enough light for your project.

You should choose the SIRUI FFEK6-E if you require a 50mm anamorphic lens for a 3:2 sensor with a 2.4:1 aspect ratio at the $300 price point. The 4.5 rating from 84 buyers reflects the experience of those who selected this model for their cinema glass needs.

Skip it if: You need to shoot a low-light indie scene or a cinematic portrait with a blurry background, as the T2.9 aperture falls short of the 1.4 to 2 f-stop range required for those specific jobs.