Sigma 31S969

Sigma 50mm F2 DG Contemporary Lens for L Mount (Silver)

Instruction Manual

Introduction

Thank you for purchasing the Sigma 50mm F2 DG Contemporary lens. This manual provides essential information for the safe and effective use of your new lens. Please read it thoroughly before using the product and keep it for future reference.

Safety Precautions

  • Do not look at the sun or other strong light sources through the lens, as this can cause permanent vision damage.
  • Keep the lens away from direct sunlight when not in use to prevent fire hazards.
  • Avoid exposing the lens to extreme temperatures, humidity, or dust.
  • Do not attempt to disassemble or modify the lens. Repairs should only be performed by authorized service personnel.
  • Keep out of reach of children.

Package Contents

Verify that all items are present in your package:

  • Sigma 50mm F2 DG Contemporary Lens
  • Lens Hood (LH633-02S)
  • Front Lens Cap
  • Rear Lens Cap
  • Instruction Manual (this document)

Parts of the Lens

Sigma 50mm F2 DG Contemporary lens for L Mount

This image displays the Sigma 50mm F2 DG Contemporary lens, a prime lens designed for L-mount cameras. It features a sleek silver finish and a compact design, suitable for various photographic applications.

The Sigma 50mm F2 DG Contemporary lens features several key components:

  • Focus Ring: Used for manual focusing.
  • Aperture Ring: Allows direct control over the lens aperture.
  • Lens Mount: Connects the lens to the camera body (L-Mount).
  • Lens Hood Attachment Point: Where the dedicated lens hood is secured.
Sigma LH633-02S lens hood for 50mm F2 DG Contemporary lens

The image shows the LH633-02S lens hood, a cylindrical accessory with a ribbed exterior, designed to attach to the Sigma 50mm F2 DG Contemporary lens. It helps to prevent stray light from entering the lens, reducing flare and ghosting, and offers protection to the front element.

Setup

Attaching the Lens

  1. Ensure both the camera and lens are powered off.
  2. Remove the rear lens cap from the lens and the body cap from the camera.
  3. Align the mounting index on the lens with the mounting index on the camera body.
  4. Insert the lens into the camera mount and rotate it clockwise until it clicks into place. Do not force the lens.

Attaching the Lens Hood (LH633-02S)

  1. Align the red dot on the lens hood with the red dot on the front of the lens.
  2. Rotate the lens hood clockwise until it locks securely into position.
  3. To remove, press the release button on the lens hood and rotate counter-clockwise.

Operating

Focusing

This lens supports both autofocus (AF) and manual focus (MF).

  • Autofocus: Set your camera's focus mode to AF. The lens will automatically focus when the shutter button is half-pressed.
  • Manual Focus: Set your camera's focus mode to MF. Rotate the focus ring on the lens to adjust focus manually. Use your camera's focus peaking or magnification features for precise focusing.

Aperture Control

The lens features an aperture ring for direct control over the aperture setting. You can also control the aperture through your camera body, depending on your camera's settings and mode.

Compatible Cameras

This lens is designed for L-Mount cameras, including models such as Leica SL, Leica TL2, and Leica CL.

Maintenance

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.
  • Never use abrasive materials, solvents, or harsh chemicals to clean the lens.

Storage

  • When not in use, attach both the front and rear lens caps.
  • Store the lens in a cool, dry place, away from direct sunlight and high humidity.
  • If storing for an extended period, consider using a desiccant to prevent mold growth.

Troubleshooting

  • Lens not recognized by camera: Ensure the lens is securely attached to the camera body. Power off and restart the camera. Check for any firmware updates for both the lens and camera.
  • Autofocus not working: Verify the camera's focus mode is set to AF. Ensure there is sufficient light and contrast in the scene for the autofocus system to operate effectively.
  • Images are blurry: Check that the lens is properly focused. Ensure the shutter speed is fast enough to prevent camera shake, especially in low light. Clean the lens elements if smudges are present.
  • Lens hood difficult to attach/remove: Ensure proper alignment of the red dots. Do not force the hood; it should click into place smoothly.

Specifications

Model Name31S969
Focal Length50mm
Maximum ApertureF2
Minimum ApertureF2
Lens TypePrime Lens
Compatible MountingsLeica L
Focus TypeAuto Focus
Image StabilizationNo image stabilization
Water Resistance LevelNot Water Resistant
Item Weight2 Pounds

Warranty and Support

Warranty Information

This product comes with a 9-year warranty. Please retain your proof of purchase for warranty claims. The warranty covers manufacturing defects under normal use. It does not cover damage caused by misuse, accidents, unauthorized repairs, or normal wear and tear.

Customer Support

For technical assistance, service, or warranty inquiries, please contact Sigma customer support through their official website or the retailer where you purchased the product. Have your model number (31S969) and proof of purchase ready when contacting support.

© 2026 Sigma Corporation. All rights reserved.

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