SIGMA 18-50mm F2.8 DC DN Contemporary Lens for Canon RF Mount Mirrorless Cameras Instruction Manual

1. Introduction

This instruction manual provides essential information for the safe and effective use of your SIGMA 18-50mm F2.8 DC DN Contemporary Lens for Canon RF Mount Mirrorless Cameras. Please read this manual thoroughly before using the product to ensure proper operation and to maximize its performance and longevity. Keep this manual in a safe place for future reference.

2. Product Overview

The SIGMA 18-50mm F2.8 DC DN Contemporary lens is a high-performance, versatile zoom lens designed specifically for Canon RF Mount APS-C mirrorless cameras. It offers a constant F2.8 aperture throughout its zoom range, providing excellent low-light performance and shallow depth of field capabilities.

Key Features:

• High Performance: Delivers high-quality optical performance across the entire zoom range.
• Lightweight and Compact: Designed to be small and light, making it ideal for everyday use and travel.
• Rubber Sealed Mount: Features a rubber-sealed mount for enhanced dust and splash resistance, suitable for various environments.
• Easy Close-Up Shots: Achieves a minimum focusing distance of 12.1cm and a maximum magnification of 1:2.8, enabling detailed close-up photography.

Figure 2.1: The SIGMA 18-50mm F2.8 DC DN Contemporary Lens. This image shows the lens with its zoom and focus rings, aperture markings, and the SIGMA branding.

Figure 2.2: The compact size of the SIGMA 18-50mm F2.8 DC DN Contemporary Lens, shown held in a hand for scale.

3. Setup

3.1 Attaching the Lens to Your Camera

1. Ensure both the camera and the lens are clean and free of dust.
2. Align the white index mark on the lens barrel with the corresponding white index mark on your Canon RF mount camera body.
3. Gently insert the lens into the camera mount.
4. Rotate the lens clockwise until it clicks into place, indicating it is securely locked.
5. Remove the front lens cap.

Important: Avoid touching the lens contacts or the camera's sensor during attachment. Always hold the lens firmly by its barrel, not by the front element.

3.2 Attaching the Lens Hood

The included lens hood helps to block unwanted stray light, reducing flare and ghosting, and provides some physical protection to the front element.

1. Align the red dot on the lens hood with the red dot on the front of the lens barrel.
2. Push the hood onto the lens and rotate it clockwise until it locks securely.

Figure 3.1: The dedicated petal-shaped lens hood for the SIGMA 18-50mm F2.8 DC DN Contemporary Lens.

For storage, the lens hood can be reversed and mounted onto the lens.

4. Operating Instructions

4.1 Zooming

To adjust the focal length, rotate the zoom ring on the lens barrel. The lens covers a versatile range from 18mm (wide-angle) to 50mm (standard/short telephoto).

Figure 4.1: A photographer using the SIGMA 18-50mm F2.8 DC DN Contemporary Lens on a Canon RF mount camera in an outdoor setting. This illustrates the lens in practical use.

4.2 Focusing

This lens supports both autofocus (AF) and manual focus (MF) modes, controlled via your camera body settings.

• Autofocus (AF): When your camera is set to AF mode, the lens will automatically focus on your subject. The lens features a fast and quiet autofocus motor.
• Manual Focus (MF): To manually focus, set your camera to MF mode. Rotate the focus ring on the lens barrel until your subject appears sharp in the viewfinder or on the camera's LCD screen.

4.3 Aperture Control

The lens maintains a constant maximum aperture of F2.8 across its entire zoom range. Aperture settings are controlled through your camera body. Refer to your camera's instruction manual for details on adjusting aperture.

4.4 Close-Up Photography

The SIGMA 18-50mm F2.8 DC DN Contemporary lens excels at close-up photography, offering a minimum focusing distance of 12.1cm (4.8 inches) and a maximum magnification ratio of 1:2.8. This allows for detailed shots of small subjects.

5. Maintenance and Care

5.1 Cleaning the Lens

• Use a blower brush to remove dust from the lens surface.
• For smudges or fingerprints, use a clean, soft microfiber cloth specifically designed for optical lenses. Apply a small amount of lens cleaning solution to the cloth, not directly to the lens.
• Clean the lens mount contacts with a dry, clean cloth.
• Never use organic solvents like paint thinner or benzene to clean the lens.

5.2 Storage

• Store the lens in a cool, dry place away from direct sunlight and high humidity.
• Attach both front and rear lens caps when not in use to protect the optical elements.
• If storing for extended periods, consider using a desiccant to prevent mold growth.

5.3 Handling Precautions

• Avoid exposing the lens to extreme temperatures or sudden temperature changes.
• The lens mount is rubber-sealed for dust and splash resistance; however, it is not waterproof. Avoid direct exposure to water.
• Do not drop or subject the lens to strong impacts.

6. Troubleshooting

If you encounter issues with your lens, please refer to the following common troubleshooting steps before contacting support.

If the problem persists after trying these steps, please contact Sigma customer support or your authorized dealer.

7. Specifications

Note: Specifications are subject to change without notice.

8. Warranty and Support

This product is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Sigma website. Keep your proof of purchase for warranty claims.

For technical support, service, or inquiries regarding your SIGMA 18-50mm F2.8 DC DN Contemporary Lens, please contact Sigma Corporation of America customer service or your local authorized Sigma dealer.

Online Resources: For the latest information, firmware updates, and additional resources, please visit the official Sigma website.