1. Introduction
This manual provides detailed instructions for the proper use, maintenance, and troubleshooting of your Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large Aperture Standard Zoom Lens. Designed for Canon Digital DSLR Cameras with APS-C sensors, this versatile lens offers exceptional image quality and performance across its zoom range.
Key Features
- FLD Glass Elements: Along with two glass mold elements and one hybrid aspherical lens, these provide excellent correction of aberrations for incredibly sharp images with great contrast.
- Constant f/2.8 Aperture: Maintains a bright f/2.8 aperture throughout the entire 17-50mm zoom range, ideal for low-light photography and achieving shallow depth of field.
- Optical Stabilizer (OS): Minimizes camera shake, allowing for sharper handheld shots in various conditions.
- Hyper Sonic Motor (HSM): Ensures quiet, high-speed autofocusing.
- Compact and Lightweight Design: Easy to handle and transport, making it a convenient everyday lens.
2. Setup
Mounting the Lens
To attach the lens to your camera body, align the red dot on the lens barrel with the red dot on your camera's lens mount. Rotate the lens clockwise until it clicks into place. Ensure the lens is securely fastened before use.
Figure 2.1: Front view of the Sigma 17-50mm lens with its lens hood.
Figure 2.2: Rear view of the Sigma 17-50mm lens, highlighting the Canon EF-S mount for attachment to compatible DSLR cameras.
3. Operating the Lens
Basic Operation
The Sigma 17-50mm lens is designed for intuitive use. Familiarize yourself with the zoom ring, focus ring, and control switches on the lens barrel.
Aperture Control
This lens features a constant maximum aperture of f/2.8 across its entire zoom range. This means you can maintain a wide aperture for consistent low-light performance and shallow depth of field, regardless of your chosen focal length.
Zoom Function
To adjust the focal length, rotate the zoom ring located on the lens barrel. The lens offers a versatile range from 17mm (wide-angle) to 50mm (standard/short telephoto), suitable for various photographic situations from landscapes to portraits.
Figure 3.1: The Sigma 17-50mm lens with its zoom and focus rings clearly visible, allowing for precise control over focal length and sharpness.
Focus Modes (AF/MF)
The lens features an AF/MF switch to toggle between autofocus and manual focus. For precise control, especially in challenging lighting or for creative effects, switch to manual focus (MF) and rotate the focus ring. For quick and convenient focusing, use autofocus (AF).
Figure 3.2: A close-up view of the lens barrel, highlighting the AF/MF (Autofocus/Manual Focus) switch and the Optical Stabilizer (OS) switch for easy mode selection.
Optical Stabilizer (OS)
The built-in Optical Stabilizer (OS) system helps to reduce blur caused by camera shake, particularly useful when shooting handheld in low light or at slower shutter speeds. Use the OS switch to turn this feature On or Off as needed. Note that stabilization may not be available on all camera mounts (e.g., Pentax or Sony mounts, as mentioned in some reviews).
Video 3.1: Official product video showcasing the features and capabilities of the Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large Aperture Standard Zoom Lens.
4. Maintenance
Cleaning the Lens
- Use a soft, lint-free microfiber cloth to gently wipe dust and smudges from the lens elements.
- For stubborn dirt, use a specialized lens cleaning solution applied to the cloth, not directly to the lens.
- Avoid touching the glass elements with your fingers.
Storage
- Always attach the front and rear lens caps when not in use to protect the glass elements.
- Store the lens in a cool, dry place, away from direct sunlight and extreme temperatures.
- If storing for extended periods, consider using a dehumidifying agent to prevent mold growth.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lens not focusing | AF/MF switch set to MF; insufficient light; dirty contacts. | Switch to AF; use external lighting; clean lens and camera contacts. |
| Images are blurry | Optical Stabilizer (OS) off; camera shake; incorrect focus. | Turn OS on; use a faster shutter speed or tripod; re-focus. |
| Zoom ring is stiff | New lens; environmental factors. | Normal for new lenses, will loosen with use; avoid extreme temperatures. |
| Vignetting on full-frame camera | Lens designed for APS-C sensors. | This is expected behavior; use a camera with an APS-C sensor or crop images. |
6. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 3.6 x 3.3 x 3.3 inches |
| Item Weight | 1.25 pounds |
| ASIN | B003A6H27K |
| Item model number | 583101 |
| Brand | Sigma |
| Focal Length Description | 17-50 millimeters |
| Lens Type | Standard |
| Compatible Mountings | Canon EF-S |
| Camera Lens Description | zoom lens |
7. Warranty and Support
Legal Disclaimer
Please contact Manufacturer for information.
Customer Support
For further assistance, technical support, or warranty claims, please refer to the official Sigma website or contact their customer service department. Contact details are typically found on the product packaging or the manufacturer's official support pages.
