1. Introduction
This manual provides comprehensive instructions for the proper use, setup, operation, and maintenance of your Sigma 28-80mm F3.5-5.6 Aspherical Macro HF Lens. Please read this manual thoroughly before using the lens to ensure optimal performance and longevity.
2. Product Overview
The Sigma 28-80mm F3.5-5.6 Aspherical Macro HF Lens is a versatile zoom lens designed for Minolta-AF cameras. It features an aspherical element for improved optical performance and a macro function for close-up photography. The "HF" designation indicates a helical focusing mechanism.
Figure 2.1: Front view of the Sigma 28-80mm F3.5-5.6 Aspherical Macro HF Lens. This image displays the lens barrel with its various rings and markings, including the zoom ring, focus ring, aperture scale, and the "28-80mm HF" and "ASPHERICAL" labels.
2.1 Lens Components
- Zoom Ring: Used to adjust the focal length between 28mm and 80mm.
- Focus Ring: Used for manual focusing.
- Aperture Ring/Scale: Displays the current aperture setting (F3.5-F22).
- Distance Scale: Indicates the focusing distance in meters and feet.
- Macro Switch/Setting: Engages the macro function for close-up photography.
- Lens Mount: Connects the lens to the camera body (Minolta-AF mount).
3. Setup
3.1 Attaching the Lens
- Ensure both the camera and lens are powered off.
- Remove the rear lens cap from the lens and the body cap from the camera.
- Align the mounting index (usually a red or white dot) on the lens with the corresponding index on the camera body.
- Insert the lens into the camera mount and rotate it clockwise (for Minolta-AF) until it clicks securely into place. Do not force the lens.
3.2 Detaching the Lens
- Ensure the camera is powered off.
- While pressing the lens release button on the camera body, rotate the lens counter-clockwise until it detaches.
- Immediately attach the rear lens cap to the lens and the body cap to the camera to protect the sensor and lens elements from dust.
4. Operating Instructions
4.1 Zooming
To change the focal length, rotate the zoom ring on the lens barrel. The lens can be set anywhere between 28mm (wide-angle) and 80mm (telephoto). The current focal length is indicated by the markings on the lens barrel.
4.2 Focusing
This lens supports both autofocus (AF) and manual focus (MF). The camera body controls the autofocus mechanism. For manual focusing, rotate the focus ring until the subject appears sharp in the viewfinder or on the camera's display. The distance scale on the lens provides an approximate focus distance.
4.3 Aperture Control
The lens features a variable maximum aperture of F3.5 at 28mm and F5.6 at 80mm. The aperture can be adjusted via the camera's controls. The aperture scale on the lens barrel indicates the range of available apertures, typically from the maximum aperture to F22.
4.4 Macro Function
To engage the macro function for close-up photography, set the zoom ring to the designated macro range (often marked on the lens, e.g., 80mm). Then, activate the macro switch or rotate the focus ring into the macro area. This allows for closer focusing distances and higher magnification ratios. Refer to the lens markings for specific macro engagement instructions.
5. Maintenance
5.1 Cleaning the Lens
- Use a blower brush to remove dust and loose particles from the lens surfaces.
- For smudges or fingerprints, apply a small amount of lens cleaning solution to a clean microfiber cloth and gently wipe the lens in a circular motion from the center outwards.
- Never use abrasive materials or harsh chemicals.
5.2 Storage
- Always attach the front and rear lens caps when the lens is not in use.
- Store the lens in a cool, dry place, away from direct sunlight and extreme temperatures.
- Consider using a dehumidified storage cabinet if you live in a humid environment to prevent mold growth.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lens not attaching securely | Incorrect alignment; debris on mount | Ensure alignment marks match; clean mount area; rotate until click. |
| Autofocus not working | Camera AF/MF switch set to MF; poor lighting; dirty contacts | Check camera settings; ensure sufficient light; clean lens and camera contacts. |
| Images are blurry | Incorrect focus; camera shake; dirty lens elements | Verify focus; use faster shutter speed or tripod; clean lens. |
| Dust inside lens | Normal accumulation over time; improper storage | Minor dust does not typically affect image quality. For significant dust, contact a professional service center. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | s1-3/62 |
| Focal Length | 28-80mm |
| Maximum Aperture | F3.5 (at 28mm) - F5.6 (at 80mm) |
| Minimum Aperture | F22 |
| Lens Type | Zoom, Aspherical, Macro, HF |
| Compatible Mountings | Minolta AF |
| Item Weight | 13.6 ounces (approx. 385 grams) |
| Package Dimensions | 5.4 x 4.2 x 4.1 inches |
| Manufacturer | Sigma Corporation |
| ASIN | B000050445 |
8. Warranty and Support
For information regarding the warranty period and terms for your Sigma lens, please refer to the warranty card included with your product or visit the official Sigma website. For technical support, service, or inquiries about replacement parts, please contact Sigma customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
Sigma Global Website: www.sigma-global.com
