Sigma 18-50mm f/3.5-5.6 DC Autofocus Zoom Aspherical Lens User Manual

Indledning

This manual provides detailed instructions for the proper use and care of your Sigma 18-50mm f/3.5-5.6 DC Autofocus Zoom Aspherical Lens. Designed exclusively for digital SLR cameras, this compact and lightweight lens offers versatile zoom capabilities and high optical performance.

The lens features an image circle optimized for digital SLR camera sensors, ensuring high-quality images throughout its entire zoom range. It incorporates aspherical lens elements to correct various aberrations and is treated with coatings to minimize flare and ghosting, common issues with digital sensors.

Figur 1: The Sigma 18-50mm f/3.5-5.6 DC Autofocus Zoom Aspherical Lens. This image shows the lens from a front-side perspective, highlighting the zoom and focus rings, as well as the focal length markings (18mm, 24mm, 28mm, 35mm, 50mm) and distance scale (in meters and feet). The lens barrel is black with white and yellow markings, and the Sigma brand name is clearly visible.

Opsætning

Fastgøring af objektivet:
Align the mounting index on the lens barrel with the corresponding index on your camera body. Rotate the lens clockwise (for Canon EF mount) until it clicks securely into place. Ensure the lens is firmly attached before use.
Fjernelse af objektivet:
While pressing the lens release button on your camera body, rotate the lens counter-clockwise until it stops. Carefully remove the lens from the camera body. Always attach the rear lens cap immediately after removal to protect the rear element and contacts.
Montering af modlysblænden:
The supplied lens hood helps to block extraneous light and reduce flare. Align the hood with the front of the lens and twist until it locks into position. For storage, the hood can be reversed and mounted on the lens.

Betjeningsvejledning

Autofocus (AF) Operation

Set the AF/MF switch on the lens barrel to "AF".
Ensure your camera's focus mode is set to autofocus.
Press the camera's shutter button halfway down to activate autofocus. The lens will adjust focus automatically.

Manual Focus (MF) Operation

Set the AF/MF switch on the lens barrel to "MF".
Rotate the focus ring on the lens barrel to manually adjust focus. Use your camera's viewfinder eller Live View display to achieve sharp focus.
The distance scale on the focus ring provides an easy reference for focusing distance.

Zoom betjening

Rotate the zoom ring on the lens barrel to change the focal length between 18mm and 50mm.
The focal length markings (18, 24, 28, 35, 50) indicate the current zoom position.

Makrofotografering

This lens is capable of macro photography with a maximum magnification ratio of 1:3.5.
The minimum focusing distance is 25cm (9.8 inches) at all focal lengths, allowing for close-up shots.

Vedligeholdelse og pleje

Rengøring af linsen: Use a soft, lint-free cloth or a lens brush to remove dust. For smudges or fingerprints, use a specialized lens cleaning solution applied to a microfiber cloth, not directly to the lens surface.
Opbevaring: When not in use, store the lens with both front and rear caps attached in a cool, dry place away from direct sunlight and extreme temperatures. Avoid storing in areas with high humidity to prevent mold growth.
Håndtering: Avoid dropping or subjecting the lens to strong impacts. Do not force any moving parts.
Water and Dust: This lens is not weather-sealed. Avoid exposure to rain, moisture, or excessive dust.

Fejlfinding

Problem	Mulig årsag/løsning
Lens does not autofocus.	Ensure the AF/MF switch on the lens is set to "AF". Check your camera's focus mode settings. Insufficient light or low contrast in the subject may hinder autofocus. Try focusing on an area with more contrast.
Billederne virker slørede eller ude af fokus.	Verify that the lens is properly attached to the camera body. Check if the focus mode is set correctly (AF or MF). Ensure shutter speed is fast enough to prevent camera shake, especially in low light or at longer focal lengths. Clean the lens elements if smudges or dust are present.
Objektivet genkendes ikke af kameraet.	Remove the lens and reattach it, ensuring a secure connection. Rengør de elektriske kontakter på både objektivet og kamerahuset med en ren, tør klud. Sørg for, at kameraets firmware er opdateret.

Specifikationer

Modelnummer: 521101
Brændvidde: 18-50 mm
Maksimal blænde: f/3.5-5.6
Linsetype: Zoom, Aspherical, DC (Digital Compatible)
Kompatible monteringer: Canon (EF-S compatible), Sigma SA, Nikon, Pentax
Minimum fokusafstand: 25 cm (9.8 tommer)
Maksimal forstørrelsesforhold: 1:3.5
Filterstørrelse: 58 mm
Dimensioner (diameter x længde): Approximately 62mm x 67.5mm (2.44 x 2.66 inches)
Produktdimensioner: 5.3 x 4.3 x 4 tommer
Varens vægt: 8.8 ounce (250 g)
Dato først tilgængelig: 17. juni 2003

Garanti og support

For warranty information and technical support, please refer to the official Sigma website or contact your local authorized Sigma dealer. Keep your purchase receipt as proof of purchase for warranty claims.

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Sigma 521101