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Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Micro Four Thirds, Neutral Flares)

BH #SI20AF133XMN • MFR #20AF133X-MN
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Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Micro Four Thirds, Neutral Flares)
Key Features
  • 37mm Image Circle Covers S35 Sensors
  • Creates 2.35:1 Aspect Ratio in 16:9
  • Eye-Tracking Autofocus with STM Motor
  • T1.8-T22 Aperture
Combining the cinematic quality of 2.35:1 widescreen imagery with the convenience of subject-tracking autofocus, this Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens is a versatile, wide-angle lens designed specifically for MFT-mount cameras with Super 35 sensors. With a 1.33x squeeze factor and T1.8 maximum aperture, the lens ensures exceptional low-light performance and allows for stunning subject isolation with its signature oval-shaped bokeh.
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Constant 1.33 squeeze factor?

Constant 1.33 squeeze factor?
Asked by: john
Yes, the Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Micro Four Thirds, Neutral Flares) has a constant 1.33x squeeze factor.
Answered by: Paige K
Date published: 2025-10-16

Is this a focus by wire lens or will it work with ...

Is this a focus by wire lens or will it work with the DJI Focus Pro lidar?
Asked by: Timon
The Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens is a focus by wire lens but it is linear and can be used with the DJI Focus Pro LiDAR.
Answered by: John W
Date published: 2025-03-18

Does this lens have hard stops for manual ...

Does this lens have hard stops for manual focusing?
Asked by: Mark
No, the Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Micro Four Thirds, Neutral Flares) does not have hard stops on the focus ring.
Answered by: Chris H
Date published: 2025-03-10

Is there any vignetting if you combine this lens ...

Is there any vignetting if you combine this lens with the Sirui 1.25x adapter?
Asked by: Kieran
You may experience some vignetting when using the Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Nikon Z, Neutral Flares) with the Sirui 1.25x adapter.
Answered by: Boyd H
Date published: 2025-05-19

Is this lens compatible with the Sirui 1.25x ...

Is this lens compatible with the Sirui 1.25x anamorphic adapter?
Asked by: Kieran
Yes, the Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Nikon Z, Neutral Flares) is compatible with the Sirui 1.25x Anamorphic Adapter.
Answered by: Jonathan S
Date published: 2025-04-22

Is the squeeze factor constant?

Is the squeeze factor constant?
Asked by: john
Yes, the squeeze factor of the Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Micro Four Thirds, Blue Flares) is constant.
Answered by: Elliot A
Date published: 2026-04-13

Can this lens be used in full frame mode with ...

Can this lens be used in full frame mode with vignetting on Nikon bodies?
Asked by: Joshua
Yes, the Sirui 20mm T1.8 1.33x Anamorphic Lens can be mounted on full-frame Nikon Z bodies, with vignetting.
Answered by: Nick Y
Date published: 2025-11-11

Does this have a focus hold when using the AF?

Does this have a focus hold when using the AF?
Asked by: Sherman
Yes, the Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens (Sony E, Neutral Flares) does include a focus hold (AF-Lock) button.
Answered by: Chris H
Date published: 2025-06-20
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