SIRUI 20mm T1.8 1.33X Anamorphic Lens User Manual

Introducció

This manual provides essential information for the proper setup, operation, and maintenance of your SIRUI 20mm T1.8 1.33X Anamorphic Lens. Please read this manual thoroughly before using the lens to ensure optimal performance and longevity.

The SIRUI 20mm T1.8 1.33X Anamorphic Lens, designed for Micro Four Thirds (M4/3) mount cameras.

Configuració

1. Muntatge de l'objectiu

1. Align the red dot on the lens barrel with the corresponding mark on your camera's lens mount.
2. Introduïu suaument l'objectiu a la muntura de la càmera.
3. Gireu la lent en sentit horari fins que faci clic, cosa que indica que està ben bloquejada.

2. Focus Mode and AFL Button

The lens features both autofocus (AF) and manual focus (MF) capabilities, controlled by a switch on the lens barrel. An Autofocus Lock (AFL) button is also provided for specific camera mounts (E/Z/L Mount).

Detail of the lens barrel showing the AF/MF switch and the AFL button for focus control.

• Interruptor AF/MF: Slide the switch to select between autofocus and manual focus modes.
• AFL Button: Press this button to lock the autofocus at the current distance. This button may also be customizable depending on your camera model.

3. Aperture Ring Click Switch

The aperture ring features a click ON/OFF switch, allowing you to choose between a clicked aperture for photography or a de-clicked (stepless) aperture for smooth iris adjustments during video recording.

The aperture ring with its click ON/OFF switch for versatile use in photography and videography.

4. Camera Compatibility (M4/3 Mount)

This lens is designed for M4/3 mount cameras. Refer to the table below for compatible camera models. For full-frame cameras, switch to APS-C/S35 mode or use post-editing to address potential vignetting.

Compatibility chart for the SIRUI 20mm T1.8 1.33X Anamorphic Lens with M4/3 mount cameras.

Funcionament

1.33X Anamorphic Aspect Ratio

The 1.33x squeeze factor of this anamorphic lens produces a 2.35:1 widescreen ratio when shooting in 16:9 mode, delivering a cinematic visual experience without the need for cropping.

Visual comparison of standard 16:9 footage and 2.35:1 widescreen footage achieved with the 1.33X anamorphic lens.

Sistema d'enfocament automàtic

Equipped with a precision STM stepping motor, the lens provides smooth, accurate, and quiet autofocus. It supports eye-tracking capabilities and offers an AF/MF switch for complete creative control.

The lens's autofocus system in action, highlighting rapid and precise subject tracking.

T1.8 Fast Aperture

The wide T1.8 aperture allows for increased light intake, which is beneficial for reducing ISO in low-light conditions, achieving sharper subject focus, and producing soft, distinctive bokeh. This enhances low-light performance and offers significant depth of field control.

Demonstration of the T1.8 fast aperture's capability in low-light environments.

Example of the unique oval bokeh characteristic of anamorphic lenses at wide apertures.

20mm Wide-Angle Perspective

The 20mm focal length provides a wide-angle perspective, equivalent to a 22mm full-frame lens horizontally. This makes it suitable for capturing expansive landscapes, starry skies, and fitting subjects within tight indoor spaces.

A scene captured with the 20mm lens, illustrating its wide field of view.

Flare Options

The SIRUI 20mm lens offers two flare options: Blue Flare and Neutral Flare. These options allow for customization of the visual style of your footage.

Examples of blue and neutral flares, demonstrating the distinct visual effects each option provides.

Distància mínima d'enfocament

The lens has a minimum focus distance of 0.4m (1.31ft), enabling close-up shots with a shallow depth of field.

A close-up shot demonstrating the lens's minimum focus distance and shallow depth of field.

Vídeos oficials de productes

Manteniment

1. Neteja de la lent

• Use a soft, lint-free cloth or a lens brush to remove dust and loose particles from the lens surface.
• For smudges or fingerprints, apply a small amount of lens cleaning solution to a microfiber cloth and gently wipe the lens in a circular motion. Avoid applying solution directly to the lens.
• Do not use abrasive materials or harsh chemicals, as these can damage the lens coatings.

2. Emmagatzematge

• When not in use, store the lens with both front and rear caps attached to protect the glass elements.
• Mantingueu la lent en un lloc sec i fresc, allunyat de la llum solar directa i de temperatures extremes.
• Consider using a dehumidifying cabinet or silica gel packets in humid environments to prevent mold growth.

3. Manipulació

• Eviteu deixar caure l'objectiu ni sotmetre-lo a impactes forts.
• Do not force any moving parts. If you encounter resistance, recheck the alignment or consult the troubleshooting section.

The compact and lightweight design of the lens facilitates easy handling and integration into various camera setups.

Resolució de problemes

1. Lens Not Mounting Correctly

• Ensure the lens and camera mount are clean and free of obstructions.
• Verify that the red alignment marks on both the lens and camera body are correctly matched before rotating to lock.
• Do not force the lens. If it does not mount easily, re-align and try again.

2. Problemes d'enfocament automàtic

• Check if the AF/MF switch on the lens is set to AF.
• Ensure your camera's focus mode is set to autofocus.
• Verify that the lens firmware is up to date. Firmware updates can be performed via the Type-C port on the lens.
• In very low light or with low-contrast subjects, autofocus may struggle. Switch to manual focus if necessary.

3. Image Quality Concerns (e.g., Vignetting)

• If using a full-frame camera, ensure it is set to APS-C/S35 crop mode to avoid vignetting.
• Vignetting can often be corrected in post-production software.
• Ensure the lens elements are clean, as smudges or dust can affect image clarity.

Especificacions

Below are the technical specifications for the SIRUI 20mm T1.8 1.33X Anamorphic Lens:

Comprehensive technical specifications for the lens.

Garantia i Suport

SIRUI products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official SIRUI weblloc web. Conserveu el rebut de compra com a comprovant de compra per a reclamacions de garantia.