Does it work on a full-frame camera?

It is built for Super35/APS-C sensors. On a full-frame body you need to shoot in crop mode, or the corners will vignette heavily.

No. It is manual focus only and has no electronic contacts, so focus and aperture are set by hand.

What widescreen ratio do I get?

The 1.33x squeeze turns a 16:9 frame into roughly 2.4:1, the standard cinema widescreen ratio.

What is the filter thread size?

It takes 67mm filters, which is handy for ND and polarizers on the front element.

Which mounts are available?

Sirui sells it in Sony E, Fujifilm X, Micro Four Thirds and Z Cam mounts. Check the mount before buying.

Is it good for stills?

It can be used for stills, but the manual focus and anamorphic distortion make it a video-first lens.

Where is the Sirui 50mm F1.8 1.33x APS-C Anamorphic Lens cheapest?

At Amazon, for $199.00, 49% under what the other stores charge, as of our latest check.

What do buyers say about the Sirui 50mm F1.8 1.33x APS-C Anamorphic Lens?

Rated 4.9 out of 5 from 61 ratings.

Where can I buy the Sirui 50mm F1.8 1.33x APS-C Anamorphic Lens?

15 stores we checked sell it, including Amazon, store.sirui.com, Lensrentals, B&H Photo-Video-Audio, Adorama.

Sirui 50mm F1.8 1.33x APS-C Anamorphic Lens Price History: $199.00

What reviewers say

4.9 / 561 ratings

Owners rate it very highly, praising the anamorphic look it delivers for the money and its build for a compact lens. Most criticism centers on the manual-focus workflow and the strong blue flares, which some find distracting.

What people mention

Anamorphic lookPraisedOwners say the 1.33x squeeze and oval bokeh give footage a genuine cinematic feel.
Flare characterMixedThe horizontal blue flares are a signature draw for some and too strong for others.
Manual focusCriticisedReviewers note the long focus throw is smooth but slow, and there is no autofocus.
BuildPraisedBuyers describe it as compact and well made for an anamorphic lens.
SharpnessPraisedUsers report it is usable wide open at f/1.8 and sharpens up when stopped down.

From store.sirui.com

1.33x anamorphic squeeze produces cinematic 2.4:1 widescreen video in a 16:9 setting
33% wider field of view than conventional 50mm lenses (about 37.5mm equivalent)
Creates horizontal blue lens flares, sci-fi reflections and oval bokeh
f/1.8 to f/16 aperture with 10 aperture blades
Covers Super35/APS-C sensors
Manual focus with 143.6° focus ring rotation; 67mm filter thread

Materials: Aluminum housing (aircraft aluminum alloy, precision CNC machining), German Schott optical glass elements, multilayer Nano coatings, precision copper focus adju
Fit: Available mounts: E, L, RF, X, MFT
Guarantee: Free replacement within 3 years for non-human product defects.
Shipping: Shipping calculated at checkout.

About the Sirui 50mm F1.8 1.33x APS-C Anamorphic Lens

The Sirui 50mm F1.8 is a 1.33x anamorphic lens with a Sony E mount. It covers Super35/APS-C sensors. The anamorphic squeeze produces cinematic 2.4:1 widescreen video in a 16:9 setting. The field of view is 33% wider than a conventional 50mm lens, about 37.5mm equivalent.

The housing is precision CNC-machined aircraft aluminum alloy, and the design is lightweight. The optics use German Schott optical glass elements with multilayer Nano coatings.

Focus is manual, with 143.6° of focus ring rotation. The aperture ranges from f/1.8 to f/16 and has 10 blades. The lens creates horizontal blue lens flares, sci-fi reflections and oval bokeh. It has a 67mm filter thread.

Mount: Sony E
Focal length: 50 mm, fixed
Aperture: f/1.8 to f/16
Aperture blades: 10
Squeeze ratio: 1.33x anamorphic
Sensor coverage: Super35/APS-C
Focus: Manual, 143.6° rotation
Filter thread: 67mm
Housing: Aluminum alloy
Color: Blue