Sirui 40mm T1.8 Anamorphic Overview
Capture cinematic widescreen footage with the aid of an autofocus option using the Sirui Micro Four Thirds-mount 40mm T1.8 1.33x S35 AF Anamorphic Lens. This innovative prime lens uses an STM motor for fast, accurate autofocus while offering manual focus for more complicated shots handled by a camera assistant/focus puller. It produces blue flares that are a classic feature of the anamorphic format and has a fast T1.8 maximum aperture lens that is ideal for low-light capture and for creating distinctive bokeh effects.
Super 35 Coverage
- This anamorphic prime lens has a 1.33x squeeze factor.
- It produces a widescreen 2.35:1 aspect ratio when shooting in a 16:9 mode.
Manual and Autofocus
- The autofocus feature now lets you capture anamorphic footage as quickly as when using spherical lenses.
- Select manual or autofocus using the switch on the lens.
- Use the AFL button to lock the autofocus or create a custom setting.
High Optical Performance
- One aspherical and five cylindrical elements contribute to the high optical quality of this lens.
- Focus breathing and chromatic aberration are well controlled.
- Supports EXIF metadata transfer and has a USB-C port for firmware upgrading.
Ideal for Low-Light Shooting
- The maximum T1.8 aperture enables you to capture low-light scenes using lower camera ISO settings.
- Choose between stepped and stepless aperture settings for smooth exposure adjustments.
- Sharpness and optical quality are maintained even in night scenes.
Flares and Distinctive Bokeh
- Shoot with a wide-open aperture to create a distinctive hexagonal bokeh.
- Stop down to get an oval bokeh that is typical of the anamorphic look.
- Create notable blue flares for an intriguing, classic sci-fi look.
All Around Prime
- This all-around 40mm lens is ideal for portraits, landscapes, street scenes, and establishing shots.
- Horizontally equivalent to 42mm in full-frame format.
Compact Cine-Style Form
- This prime lens features a compact, lightweight design suitable for handheld and gimbal work.
- Cine-style features include an 80mm front outside diameter, standard 0.8 MOD gears, and wide 360° focus rotation.
Sirui 40mm T1.8 Anamorphic Lens Specifications
General Specifications
| Focal Length | 40 mm |
| Maximum Aperture | T1.8 |
| Minimum Aperture | T22 |
| Lens Format Coverage | Super35/APS-C |
| Horizontal Squeeze (Anamorphic) | 1.33x |
Optical and Build Details
| Optical Design | 16 Elements in 12 Groups |
| Diaphragm Blades | 11 |
| Image Circle | 37.0 mm |
| Angle of View | Super35: Horizontal: 55° Vertical: 25.4° |
| Minimum Focus Distance | 60.05 cm |
| Filter Thread | 77 mm x 0.75 |
| Diameter | 80 mm |
| Weight | 614 g |
Features and Connectivity
| Image Stabilization | No |
| Electronic Communication | Yes |
| Camera Connection | 10 x Flat Contacts (EXIF) Data |
| Gear Standard | Focus: 0.8 MOD Iris: 0.8 MOD |
| Gear Rotation | Focus: 360° |
What's in the box
- 1 x Sirui 40mm T1.8 1.33x S35 AF Anamorphic Lens
- 1 x Front Lens Cap
- 1 x Rear Lens Cap
- 1 x Lens Pouch with Strap
- Barcode: 78317
- UPC Barcode: 6952060075891
- Supplier Code: 40AF133X-MB