Anamorphic lenses are closely linked to cinematic visuals and the widescreen look of movies. This guide explains the anamorphic lens definition, what anamorphic means, how these lenses work, and how they differ from standard spherical lenses.
What Does Anamorphic Mean?
"Anamorphic" comes from the Greek for "to transform." An anamorphic lens uses cylindrical optical elements to squeeze a wider horizontal view onto the camera sensor. In editing, the footage is de-squeezed back to a widescreen ratio such as 2.39:1.
In simple terms, the lens compresses the scene horizontally while recording, then the image is stretched back to normal proportions. The result is a frame that is much wider than it is tall. Depending on the squeeze factor and the recording area, most anamorphic lenses produce a final ratio of around 2:1 to 2.4:1. When this wider footage is shown on a standard 16:9 screen, black bars appear above and below the image.
How Does an Anamorphic Lens Work?
A standard spherical lens records the scene without horizontal compression, so the image matches the sensor's native ratio. An anamorphic lens instead uses cylindrical elements that compress a wider field of view onto the same sensor. This lets it capture more of the scene horizontally without needing a physically wider sensor.
The squeezed footage looks stretched vertically when viewed directly. Most modern cameras and monitors offer a de-squeeze preview while shooting, and editing software applies the final de-squeeze in post-production.
Anamorphic vs Spherical Lens: What's the Difference?
| Anamorphic lens | Spherical lens | |
|---|---|---|
| How the image is recorded | Horizontally squeezed, then de-squeezed | Recorded as seen |
| Typical final ratio | About 2:1 to 2.39:1 or wider | Matches the sensor (e.g. 16:9, 3:2) |
| Bokeh shape | Oval | Round |
| Lens flare | Horizontal streaks | Round or scattered flare |
| Post workflow | De-squeeze in camera monitor or in editing | None |
| Common use | Narrative film, music videos, commercials | General photo and video |
What Does an Anamorphic Lens Do to Your Image?
The main purpose of an anamorphic lens is to recreate the visual language of cinema. By capturing a wider frame, it emphasizes the scale and depth of a scene. It also adds characteristic horizontal lens flares and oval bokeh, which many filmmakers use as part of their visual style. Many creators also use rack focus, a smooth shift of focus between subjects within one shot, to guide the viewer's eye.
Anamorphic lenses are most common in filmmaking, but they are increasingly popular in photography as well. Photographers use them for landscapes, portraits and street scenes with a widescreen, cinematic feel. They are not limited to wide views either: anamorphic lenses can also be used for close-ups with controlled distortion, giving room to play with perspective and focus in tighter compositions.
SIRUI Anamorphic Lenses to Explore
Anamorphic lenses are known for their distinctive flares. Some produce a classic blue streak, while others render flares in natural, warm tones that suit everyday shooting. The SIRUI Venus 135mm T2.9 1.8x, for example, is known for its blue flare and oval bokeh, a clear illustration of how anamorphic optics reshape both light and background blur.
SIRUI anamorphic lenses cover several squeeze factors:
| SIRUI series | Squeeze factor | Format | Notes |
|---|---|---|---|
| Astra | 1.33x | Full frame | Autofocus anamorphic |
| IronStar | 1.5x | Full frame | 35–135mm, EF/PL interchangeable |
| Saturn / Saturn V2 | 1.6x | Full frame | Carbon fiber; V2 switches between horizontal and vertical shooting |
| Venus | 1.8x | Full frame | Blue flare, oval bokeh |
SIRUI Saturn V2 T2.9 1.6x — A full-frame anamorphic lens with a T2.9–T16 aperture range. The lens rotates 90° to switch between horizontal and vertical shooting, so the same lens can be used for widescreen footage and vertical video.
SIRUI Saturn 35/50/75mm T2.9 1.6x — A carbon fiber full-frame anamorphic lens that pairs a lightweight build with an accessible price, making it a practical entry into anamorphic shooting. Available in Sony E mount, Canon RF mount, Nikon Z mount, Fuji X mount, Leica L mount, and DL mount.
SIRUI Astra 50/75/100mm T1.8 1.33x — The world's first autofocus full-frame anamorphic lens. For photographers and run-and-gun filmmakers who want the anamorphic look with the convenience of autofocus. Available in Sony E mount, Leica L mount, and Nikon Z mount.
SIRUI IronStar 35/45/60/75/100/135mm T1.9 1.5x — With the widest focal length coverage in the lineup, IronStar suits creators who need flexibility across portraits, landscapes and product shots while keeping a consistent anamorphic look from lens to lens. Available in interchangeable EF and PL mount.
Final Thoughts
An anamorphic lens squeezes a wider view onto the sensor, then de-squeezes it into a widescreen frame with oval bokeh and horizontal flares. Whether you are drawn to the aspect ratio, the flares or the bokeh, these lenses offer a distinct way to bring cinematic storytelling into filmmaking and photography. From the Venus 135mm to Saturn V2, Saturn, Astra and IronStar, SIRUI's anamorphic lineup offers several squeeze factors and focal lengths for different budgets and shooting styles.
FAQ
What does anamorphic mean?
Anamorphic comes from the Greek for "to transform." In filmmaking, it describes a lens that squeezes a wider horizontal view onto the camera sensor. The image is then stretched back to its normal proportions, which produces a widescreen aspect ratio.
What does an anamorphic lens do?
An anamorphic lens compresses the image horizontally using cylindrical glass elements. After de-squeezing, the footage has a wider aspect ratio than the sensor alone would give, along with oval bokeh and horizontal lens flares that are typical of the cinematic look.
What is an anamorphic squeeze factor?
The squeeze factor shows how much the lens compresses the image horizontally, such as 1.33x, 1.5x, 1.6x or 1.8x. A higher squeeze factor produces a wider final image. For example, a 1.33x lens on a 16:9 sensor area gives about 2.36:1, close to the 2.39:1 cinema standard.
Why does an anamorphic lens create oval bokeh?
Because the lens squeezes the image horizontally, out-of-focus points of light are recorded as vertical ovals. They keep that oval shape after de-squeezing. Higher squeeze factors generally produce more noticeably oval bokeh.
Can you use an anamorphic lens for photography?
Yes. Anamorphic lenses can be used for still photos as well as video. The images need to be de-squeezed in editing software by stretching the width by the squeeze factor, which produces a widescreen photo with oval bokeh and horizontal flares.
What is the difference between an anamorphic and a spherical lens?
A spherical lens records the scene without horizontal compression, so the image matches the sensor's ratio and bokeh is round. An anamorphic lens squeezes the image horizontally, requires de-squeezing, and produces a wider ratio with oval bokeh and horizontal flares.
