Sigma 28-105mm F2.8 DG DN Lens for Sony E-Mount Instruction Manual

1. Introduction

This manual provides detailed instructions for the proper use and care of your Sigma 28-105mm F2.8 DG DN lens for Sony E-mount cameras. Please read this manual thoroughly before using the lens to ensure optimal performance and longevity. This lens is designed for full-frame mirrorless cameras and offers a versatile zoom range with a constant F2.8 aperture, suitable for a wide array of photographic applications.

2. What's in the Box

Upon opening your Sigma 28-105mm F2.8 DG DN lens package, you should find the following items:

• Sigma 28-105mm F2.8 DG DN Lens
• Lens Case
• Lens Hood (LH878-07)
• Front Lens Cap (LCF-82 III)
• Rear Lens Cap (LCR II)

3. Product Overview

The Sigma 28-105mm F2.8 DG DN is a high-performance zoom lens engineered for Sony E-mount mirrorless cameras. It features a constant F2.8 maximum aperture across its entire zoom range, providing excellent low-light performance and shallow depth of field control. The lens incorporates advanced optical elements to deliver high image quality, sharpness, and beautiful bokeh. Its robust construction includes weather sealing for durability in various shooting conditions, and internal focusing ensures consistent handling.

Figure 3.1: The Sigma 28-105mm F2.8 DG DN lens, showcasing its sleek design and control rings.

Figure 3.2: A detailed view of the lens barrel, highlighting the zoom ring, focus ring, AF/MF switch, and AFL button.

4. Setup

4.1. Mounting the Lens

1. Ensure your camera is turned off.
2. Remove the rear lens cap from the lens and the body cap from your camera.
3. Align the white index mark on the lens barrel with the corresponding white index mark on your camera's lens mount.
4. Insert the lens into the camera mount and rotate it clockwise until it clicks into place. Do not force the lens.

4.2. Attaching and Detaching the Lens Hood (LH878-07)

The included lens hood helps to block extraneous light and protect the front element of the lens.

Figure 4.1: The LH878-07 petal-shaped lens hood for the Sigma 28-105mm F2.8 DG DN lens.

1. Attaching: Align the red dot on the lens hood with the red dot on the front of the lens barrel. Rotate the hood clockwise until it clicks into place.
2. Detaching: While pressing the release button on the side of the lens hood, rotate it counter-clockwise until it detaches.
3. The lens hood can be reversed and mounted on the lens for compact storage.

5. Operating the Lens

5.1. Focus Mode Switch (AF/MF)

Located on the side of the lens barrel, this switch allows you to select between autofocus (AF) and manual focus (MF).

• AF (Autofocus): The camera automatically focuses on the subject.
• MF (Manual Focus): You manually adjust the focus by rotating the focus ring.

5.2. Zoom Ring

Rotate the wide, ribbed zoom ring to change the focal length from 28mm (wide-angle) to 105mm (telephoto). The current focal length is indicated by markings on the lens barrel.

5.3. Aperture Ring and Click Switch

The lens features an aperture ring for direct control over the aperture setting. The 'A' position allows the camera to control the aperture automatically.

• Rotate the aperture ring to select your desired aperture value (e.g., F2.8, F4, F5.6).
• The CLICK switch allows you to enable or disable the click stops on the aperture ring. Disabling clicks is useful for smooth aperture transitions during video recording.

5.4. Focus Lock (AFL) Button

The AFL button can be customized via your camera's menu to perform various functions, such as locking focus, activating Eye AF, or other programmable controls. Refer to your camera's instruction manual for customization options.

6. Maintenance and Care

Proper maintenance ensures the longevity and performance of your lens.

• Cleaning the Lens: Use a soft, clean microfiber cloth specifically designed for optical lenses to gently wipe away dust or smudges. For stubborn marks, use a small amount of lens cleaning fluid applied to the cloth, not directly to the lens.
• Cleaning the Lens Mount: Use a clean, dry cotton swab to gently clean the electrical contacts on the lens mount. Avoid touching the contacts with your fingers.
• Storage: When not in use, store the lens with both front and rear caps attached, preferably in its dedicated case or a dry, cool place away from direct sunlight and extreme temperatures.
• Avoid Impact: Protect the lens from drops or strong impacts, which can damage internal components.
• Weather Sealing: While the lens features weather sealing, it is not fully waterproof. Avoid prolonged exposure to heavy rain or submersion in water.

7. Troubleshooting

If you encounter issues with your lens, consider the following common solutions:

• Lens not recognized by camera: Ensure the lens is securely mounted and the electrical contacts on both the lens and camera are clean. Turn the camera off and on again.
• Autofocus not working: Check if the lens is set to AF mode. Ensure there is sufficient light and contrast for the camera's autofocus system to operate effectively.
• Image quality issues (e.g., blurriness): Verify that the lens is clean and free from smudges. Check your camera's focus settings and ensure you are using an appropriate shutter speed to prevent camera shake.
• Lens not zooming smoothly: Ensure no debris is obstructing the zoom mechanism. If the issue persists, contact customer support.

For persistent issues, consult your camera's manual or contact Sigma customer support.

8. Specifications

9. Warranty and Support

Your Sigma 28-105mm F2.8 DG DN lens is covered by a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions, including warranty period and coverage details. For technical support, service, or warranty claims, please visit the official Sigma website or contact their authorized service centers in your region.

Keep your proof of purchase for warranty validation.