Introduction
This manual provides essential information for the safe and effective use of your Sigma 24-70mm f/2.8 DG OS HSM Art Lens for Nikon F. This large-diameter standard zoom lens is designed for high-megapixel digital cameras, featuring three SLD (Special Low Dispersion) glass elements and four aspherical lens elements to minimize optical aberrations and deliver high-quality images.
What's in the Box
Upon opening your Sigma 24-70mm f/2.8 DG OS HSM Art Lens package, you should find the following items:
- Sigma 24-70mm f/2.8 DG OS HSM Art Lens
- Lens Hood
- Front Lens Cap
- Rear Lens Cap
- Lens Case
Product Overview
The Sigma 24-70mm f/2.8 DG OS HSM Art Lens is engineered for robust performance and functionality. Key features include:
- Optical Stabilizer (OS) Functionality: Helps reduce camera shake for sharper images.
- Hyper Sonic Motor (HSM): Provides fast, quiet, and accurate autofocus.
- Durable Lens Barrel: Designed for high rigidity and longevity.
- Constant f/2.8 Aperture: Maintains a bright aperture throughout the zoom range for consistent low-light performance and depth of field control.
Figure 1: Front view of the Sigma 24-70mm f/2.8 DG OS HSM Art Lens. This image shows the lens from the front, highlighting the large front element and the zoom ring.
Figure 2: Angled view of the Sigma 24-70mm f/2.8 DG OS HSM Art Lens with its included lens hood attached. The lens hood helps to prevent flare and protect the front element.
Setup
Attaching the Lens to Your Camera
- Ensure your camera is powered off.
- Remove the rear lens cap from the lens and the body cap from your camera.
- Align the mounting index on the lens with the mounting index on the camera body.
- Insert the lens into the camera mount and turn it clockwise until it clicks into place. Do not force the lens.
- Attach the lens hood by aligning its mark with the mark on the front of the lens, then twist until it locks.
Figure 3: Side view of the Sigma 24-70mm f/2.8 DG OS HSM Art Lens securely mounted on a camera body. This view shows the lens controls and the camera's grip.
Figure 4: Top view of the Sigma 24-70mm f/2.8 DG OS HSM Art Lens mounted on a camera body. This perspective highlights the lens's profile and how it integrates with the camera.
Operating Instructions
Focus Mode Switch (AF/MF)
The lens features a switch to select between Autofocus (AF) and Manual Focus (MF). For automatic focusing, set the switch to AF. For manual focusing, set the switch to MF and rotate the focusing ring to adjust focus. The autofocus performance is highly effective, even with older camera bodies.
Optical Stabilizer (OS) Switch
The Optical Stabilizer (OS) function helps to compensate for camera shake, allowing for sharper images, especially in low light or at slower shutter speeds. Use the OS ON/OFF switch on the lens barrel to activate or deactivate this feature as needed. This feature is beneficial for handheld shooting.
Zoom Ring
Rotate the zoom ring to change the focal length between 24mm and 70mm. The constant f/2.8 aperture ensures consistent exposure and depth of field characteristics across the entire zoom range. The zoom ring operates smoothly, providing precise control over your composition.
Maintenance
- Cleaning the Lens: Use a soft, lint-free cloth and a specialized lens cleaning solution to gently wipe the lens elements. Avoid touching the glass with your fingers.
- Dust Removal: Use a blower brush to remove dust from the lens surface.
- Storage: When not in use, store the lens with both front and rear caps attached, preferably in its lens case, in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid Moisture: Do not expose the lens to rain, water, or high humidity. If it gets wet, wipe it immediately with a dry cloth.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lens not focusing | Focus mode set to MF; dirty lens contacts; insufficient light. | Set focus mode to AF. Clean lens and camera contacts. Use adequate lighting or a flash. |
| Images are blurry | Camera shake; incorrect focus; dirty lens elements. | Ensure OS is ON (if applicable). Re-focus. Clean lens elements. Use a faster shutter speed or tripod. |
| Lens not recognized by camera | Improperly mounted lens; dirty electrical contacts. | Re-mount the lens securely. Clean the electrical contacts on both the lens and camera body. |
Specifications
- Brand: Sigma
- Model Number: 576955
- Focal Length: 24-70mm
- Maximum Aperture: f/2.8
- Lens Type: Zoom
- Compatible Mountings: Nikon F
- Optical Stabilization (OS): Yes
- Hyper Sonic Motor (HSM): Yes
- Product Dimensions: 3.5 x 4.2 x 4.2 inches
- Item Weight: 2 pounds
- Batteries: 1 Nonstandard Battery (required for some functions, typically for OS)
Warranty and Support
For warranty information, product registration, and technical support, please refer to the official Sigma website or contact your local authorized Sigma dealer. Keep your proof of purchase for warranty claims.
Manufacturer: Sigma Corporation of America
