Sigma 28-70mm F2.8 EX Aspherical Lens for Canon-AF Camera User Manual

Introduksjon

This manual provides essential instructions for the proper use and care of your Sigma 28-70mm F2.8 EX Aspherical Lens, designed specifically for Canon-AF SLR cameras. This lens offers a versatile focal range and a constant f/2.8 maximum aperture, making it suitable for various photographic situations. Please read this manual thoroughly before using the lens to ensure optimal performance and longevity.

Figure 1: Sigma 28-70mm F2.8 EX Aspherical Lens. This image illustrates the overall appearance of the lens.

Oppsett

Feste objektivet

1. Sørg for at både kameraet og objektivet er rene og fri for støv.
2. Fjern det bakre objektivdekselet fra objektivet og kamerahusdekselet fra kameraet.
3. Align the mounting index (usually a red dot or white line) on the lens barrel with the corresponding index on the camera body.
4. Sett objektivet inn i kameraets objektivfatning og roter det med klokken til det klikker på plass. Ikke bruk makt på objektivet.

Figure 2: Illustrative image of a lens being attached to a camera body. Ensure alignment marks are matched before rotating.

Fjerning av linsen

1. Slå av kameraet.
2. Mens du trykker på utløserknappen for objektivet på kamerahuset, roterer du objektivet mot klokken til det stopper.
3. Fjern objektivet forsiktig fra kamerafestet.
4. Attach the rear lens cap to the lens and the body cap to the camera to protect the sensor and lens elements.

Bruk av linsen

Fokusering

This lens supports both autofocus (AF) and manual focus (MF). The focus mode switch is located on the side of the lens barrel.

• Autofokus (AF): Set the switch to 'AF'. The camera will automatically focus when the shutter button is half-pressed.
• Manuell fokus (MF): Set the switch to 'MF'. Rotate the focus ring on the lens barrel to achieve sharp focus. Use the camera's viewfinder or LCD screen to assist with focusing.

The minimum focusing distance for this lens is 15.7 inches (approximately 40 cm) across all focal lengths.

Zoomer

To change the focal length, rotate the zoom ring on the lens barrel. The lens offers a focal range from 28mm (wide-angle) to 70mm (short telephoto). The current focal length is indicated by markings on the lens barrel.

Figure 3: Illustrative image showing the location of the focus and zoom rings on the lens barrel.

Blenderåpningskontroll

This lens features a constant maximum aperture of F2.8 throughout its zoom range. Aperture settings are controlled via the camera body. Refer to your camera's instruction manual for details on adjusting aperture.

Bruke filtre

The lens incorporates helical focusing, which means the front lens barrel does not rotate during focusing. This design is convenient for using polarizing filters or other filters that require precise orientation.

Vedlikehold

Rengjøring av linsen

• Bruk en blåsebørste for å fjerne støv og løse partikler fra linseoverflatene.
• For flekker eller fingeravtrykk, påfør en liten mengde linserengjøringsmiddel på en ren mikrofiberklut og tørk forsiktig av linsen i en sirkelbevegelse fra midten og utover.
• Never use abrasive materials, solvents, or household cleaners on the lens.

Lagring

• Sett alltid på fremre og bakre linsedeksel når objektivet ikke er i bruk.
• Oppbevar linsen på et kjølig og tørt sted, unna direkte sollys og ekstreme temperaturer.
• Hvis du oppbevarer over lengre tid, bør du vurdere å bruke et avfuktingsmiddel for å forhindre muggvekst.

Feilsøking

• Objektivet gjenkjennes ikke av kameraet: Ensure the lens is securely attached and clicked into place. Turn the camera off and on again. Clean the electrical contacts on both the lens and camera body with a clean, dry cloth.
• Autofokus fungerer ikke: Check if the lens is set to 'AF' mode. Ensure there is sufficient light and contrast in the scene for the camera's autofocus system to operate effectively.
• Bildene er uskarpe: Verify that the lens is properly focused. Check the camera's shutter speed to ensure it's fast enough to prevent motion blur, especially in low light or with moving subjects. Ensure the lens elements are clean.

If problems persist, consult your camera's manual or contact Sigma customer support.

Spesifikasjoner

Garanti og støtte

For information regarding warranty coverage, service, or technical support, please refer to the warranty card included with your product or visit the official Sigma Corporation of America webnettstedet. Ta vare på kjøpskvitteringen som kjøpsbevis for garantikrav.

Produsent: Sigma Corporation of America