Sigma 24mm f/1.4 DG HSM Art Lens (Model 401954) Instruction Manual

Indledning

Thank you for choosing the Sigma 24mm f/1.4 DG HSM Art Lens. This high-performance wide-angle prime lens is designed to deliver exceptional optical quality, making it suitable for a wide range of photographic applications, including landscape, architecture, and astrophotography. This manual provides essential information for the proper use, care, and maintenance of your lens.

Produkt overview

The Sigma 24mm f/1.4 DG HSM Art Lens is part of Sigma's Global Vision Art line, known for its sophisticated optical design and high-level performance. Key features include:

• Stor blændeåbning: A bright f/1.4 maximum aperture excels in low-light conditions and provides extensive control over depth of field.
• Avanceret optisk design: Incorporates FLD and SLD glass elements to minimize chromatic aberrations and distortions, ensuring high sharpness and clarity.
• Hypersonisk motor (HSM): Giver hurtig, stille og præcis autofokus.
• Super flerlagsbelægning: Reduces flare and ghosting for improved contrast and color fidelity.
• Minimum fokusafstand: Capable of focusing as close as 7.1 inches (18 cm) for dynamic close-up shots.

Figur 1: Forside view of the Sigma 24mm f/1.4 DG HSM Art Lens with its included lens hood.

Opsætning

Montering af objektivet på dit kamera

1. Sørg for, at både kameraet og objektivet er rene og fri for støv.
2. Align the mounting index (red dot or white square) on the lens barrel with the corresponding index on your Canon EF mount camera body.
3. Rotate the lens clockwise until it clicks securely into place. Do not force the lens.

Afmontering af objektivet

1. Mens du holder objektivets udløserknap på kamerahuset nede, skal du dreje objektivet mod uret, indtil det stopper.
2. Fjern forsigtigt objektivet fra kamerahuset.
3. Attach the front and rear lens caps to protect the glass elements.

Figur 2: Side view of the lens, highlighting the AF/MF focus mode switch.

Betjening af objektivet

Fokustilstandsknap (AF/MF)

The lens features an AF/MF switch on its barrel. This switch allows you to select between autofocus (AF) and manual focus (MF) modes.

• AF (autofokus): For automatic focusing. The Hyper Sonic Motor (HSM) provides fast and quiet operation.
• MF (Manuel fokus): For manual focusing. Rotate the focus ring to adjust focus. This mode is often preferred for precise focusing in specialized applications like astrophotography.

Blændekontrol

The aperture (f/1.4 to f/16) is controlled via your camera body. A wider aperture (smaller f-number) allows more light into the lens, ideal for low-light photography and creating shallow depth of field with pleasing background blur (bokeh). A narrower aperture (larger f-number) increases depth of field, suitable for landscapes.

Astrophotography Considerations

This lens is highly regarded for astrophotography due to its wide 24mm focal length and fast f/1.4 aperture. When shooting stars or the Milky Way:

• Set the lens to MF (Manual Focus).
• Focus to infinity. It is recommended to use your camera's Live View mode and zoom in on a bright star to achieve precise focus.
• Consider using a star tracker for longer exposures to prevent star trails.

Figur 3: Øverst view of the lens, showing the focus distance scale in feet and meters.

Opretholdelse

Rengøring af linsen

• Use a soft, lint-free cloth or a lens brush to remove dust from the lens surface.
• For stubborn smudges, apply a small amount of lens cleaning solution to a microfiber cloth and gently wipe the lens in a circular motion.
• Brug aldrig slibende materialer eller barske kemikalier.

Opbevaring

• Sæt altid det forreste og bageste objektivdæksel på, når objektivet ikke er i brug.
• Opbevar linsen et køligt, tørt sted, væk fra direkte sollys og ekstreme temperaturer.
• Hvis du opbevarer i længere perioder, bør du overveje at bruge et affugtningsmiddel for at forhindre skimmelvækst.

Fejlfinding

Autofokus problemer

If you experience inconsistent or inaccurate autofocus, consider the following:

• Firmwareopdatering: Sigma periodically releases firmware updates to improve lens performance. It is highly recommended to keep your lens firmware up to date. This often requires the Sigma USB Dock (sold separately) and Sigma Optimization Pro software.
• Fokus kalibrering: Some camera bodies allow for in-camera micro-adjustment of autofocus. If you have a Sigma USB Dock, you can perform more precise calibration for different focus distances.
• Lysforhold: Autofocus performance can be affected by very low light or subjects with low contrast. Switch to manual focus if necessary.

Bekymringer om billedkvalitet

If images appear soft or lack expected sharpness:

• Check Focus: Ensure your subject is in sharp focus. In manual focus, verify using Live View forstørrelse.
• Blænde: While the lens performs well wide open, stopping down by one or two stops (e.g., from f/1.4 to f/2.0 or f/2.8) can sometimes improve corner sharpness.
• Camera Shake: Use a tripod or faster shutter speed to avoid blur from camera movement.

Specifikationer

Garanti og support

This Sigma lens is covered by a manufacturer's warranty. For specific warranty terms, registration, and support, please refer to the official Sigma website or contact Sigma customer service directly. Keep your proof of purchase for warranty claims.

For technical assistance, firmware updates, or service, please visit the Sigma Global Vision webwebsted or consult your local authorized Sigma dealer.